/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:23:05,109 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:23:05,163 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:23:05,179 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:23:05,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:23:05,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:23:05,180 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:23:05,181 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:23:05,181 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:23:05,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:23:05,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:23:05,185 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:23:05,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:23:05,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:23:05,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:23:05,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:23:05,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:23:05,186 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:23:05,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:23:05,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:23:05,187 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:23:05,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:23:05,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:23:05,188 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:23:05,188 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:23:05,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:23:05,188 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:23:05,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:23:05,189 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:23:05,189 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:23:05,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:23:05,190 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:23:05,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:23:05,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:23:05,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:23:05,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:23:05,376 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:23:05,376 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:23:05,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-17 11:23:06,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:23:06,568 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:23:06,571 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-17 11:23:06,581 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf5e02eb/6d64f0f8962546d9bc7e5488959c54c5/FLAGff041c738 [2023-11-17 11:23:06,592 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9cf5e02eb/6d64f0f8962546d9bc7e5488959c54c5 [2023-11-17 11:23:06,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:23:06,595 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:23:06,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:23:06,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:23:06,599 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:23:06,599 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,600 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308219f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06, skipping insertion in model container [2023-11-17 11:23:06,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,643 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:23:06,840 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2023-11-17 11:23:06,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:23:06,855 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:23:06,878 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i[30570,30583] [2023-11-17 11:23:06,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:23:06,905 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:23:06,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06 WrapperNode [2023-11-17 11:23:06,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:23:06,906 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:23:06,906 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:23:06,906 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:23:06,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,923 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,946 INFO L138 Inliner]: procedures = 165, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-11-17 11:23:06,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:23:06,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:23:06,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:23:06,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:23:06,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,965 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:23:06,971 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:23:06,971 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:23:06,971 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:23:06,972 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (1/1) ... [2023-11-17 11:23:06,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:23:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:23:06,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:23:07,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:23:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:23:07,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:23:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:23:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:23:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:23:07,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:23:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:23:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:23:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:23:07,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:23:07,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:23:07,024 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:23:07,110 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:23:07,112 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:23:07,217 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:23:07,306 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:23:07,306 INFO L307 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-17 11:23:07,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:23:07 BoogieIcfgContainer [2023-11-17 11:23:07,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:23:07,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:23:07,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:23:07,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:23:07,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:23:06" (1/3) ... [2023-11-17 11:23:07,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427c6041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:23:07, skipping insertion in model container [2023-11-17 11:23:07,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:23:06" (2/3) ... [2023-11-17 11:23:07,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427c6041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:23:07, skipping insertion in model container [2023-11-17 11:23:07,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:23:07" (3/3) ... [2023-11-17 11:23:07,314 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2023-11-17 11:23:07,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:23:07,326 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 11:23:07,326 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:23:07,353 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,414 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2023-11-17 11:23:07,414 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:07,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 5/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-17 11:23:07,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,421 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:07,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,436 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 28 transitions, 60 flow [2023-11-17 11:23:07,447 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2023-11-17 11:23:07,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:07,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 42 events. 5/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 93 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2023-11-17 11:23:07,448 INFO L119 LiptonReduction]: Number of co-enabled transitions 320 [2023-11-17 11:23:07,889 INFO L134 LiptonReduction]: Checked pairs total: 888 [2023-11-17 11:23:07,890 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:23:07,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:07,913 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;@352f3f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:07,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:23:07,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:07,917 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-17 11:23:07,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:07,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:07,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-17 11:23:07,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:23:07,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 204480, now seen corresponding path program 1 times [2023-11-17 11:23:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343148839] [2023-11-17 11:23:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:07,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:08,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343148839] [2023-11-17 11:23:08,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343148839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:08,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:08,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409090791] [2023-11-17 11:23:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:08,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:08,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:08,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2023-11-17 11:23:08,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 40 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:08,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2023-11-17 11:23:08,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:08,106 INFO L124 PetriNetUnfolderBase]: 35/103 cut-off events. [2023-11-17 11:23:08,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:08,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 103 events. 35/103 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 35 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 174. Up to 91 conditions per place. [2023-11-17 11:23:08,108 INFO L140 encePairwiseOnDemand]: 43/44 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-11-17 11:23:08,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 66 flow [2023-11-17 11:23:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:23:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:23:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2023-11-17 11:23:08,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2023-11-17 11:23:08,119 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 35 transitions. [2023-11-17 11:23:08,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 35 transitions. [2023-11-17 11:23:08,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:08,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 35 transitions. [2023-11-17 11:23:08,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,125 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,126 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 40 flow. Second operand 2 states and 35 transitions. [2023-11-17 11:23:08,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 66 flow [2023-11-17 11:23:08,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:08,130 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2023-11-17 11:23:08,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-11-17 11:23:08,135 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-11-17 11:23:08,136 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2023-11-17 11:23:08,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:08,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:23:08,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:23:08,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 6338915, now seen corresponding path program 1 times [2023-11-17 11:23:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:08,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420580547] [2023-11-17 11:23:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:08,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420580547] [2023-11-17 11:23:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420580547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:08,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:08,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487944193] [2023-11-17 11:23:08,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:08,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 44 [2023-11-17 11:23:08,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:08,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 44 [2023-11-17 11:23:08,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:08,304 INFO L124 PetriNetUnfolderBase]: 41/110 cut-off events. [2023-11-17 11:23:08,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:08,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 110 events. 41/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 19 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 220. Up to 67 conditions per place. [2023-11-17 11:23:08,305 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 18 selfloop transitions, 4 changer transitions 6/29 dead transitions. [2023-11-17 11:23:08,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 29 transitions, 118 flow [2023-11-17 11:23:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-17 11:23:08,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2023-11-17 11:23:08,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-17 11:23:08,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-17 11:23:08,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:08,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-17 11:23:08,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,309 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 42 transitions. [2023-11-17 11:23:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 29 transitions, 118 flow [2023-11-17 11:23:08,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:08,310 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 66 flow [2023-11-17 11:23:08,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-11-17 11:23:08,311 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 11:23:08,311 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 66 flow [2023-11-17 11:23:08,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:08,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:23:08,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:23:08,312 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:23:08,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1789437488, now seen corresponding path program 1 times [2023-11-17 11:23:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319886385] [2023-11-17 11:23:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:08,342 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:08,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:08,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:08,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:23:08,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:23:08,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:23:08,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:23:08,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:23:08,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:08,365 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:08,365 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:23:08,373 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:08,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,381 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2023-11-17 11:23:08,381 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:23:08,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 8/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2023-11-17 11:23:08,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,383 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:08,383 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 39 transitions, 88 flow [2023-11-17 11:23:08,388 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2023-11-17 11:23:08,389 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:23:08,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 8/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 45. Up to 6 conditions per place. [2023-11-17 11:23:08,390 INFO L119 LiptonReduction]: Number of co-enabled transitions 860 [2023-11-17 11:23:08,857 INFO L134 LiptonReduction]: Checked pairs total: 3967 [2023-11-17 11:23:08,857 INFO L136 LiptonReduction]: Total number of compositions: 27 [2023-11-17 11:23:08,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:08,863 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;@352f3f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:08,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:23:08,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:08,864 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-17 11:23:08,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:08,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:08,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-17 11:23:08,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:23:08,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:08,865 INFO L85 PathProgramCache]: Analyzing trace with hash 259602, now seen corresponding path program 1 times [2023-11-17 11:23:08,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:08,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906446099] [2023-11-17 11:23:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:08,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:08,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906446099] [2023-11-17 11:23:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906446099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:08,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:08,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:08,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215779425] [2023-11-17 11:23:08,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:08,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:08,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 66 [2023-11-17 11:23:08,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:08,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:08,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 66 [2023-11-17 11:23:08,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:08,988 INFO L124 PetriNetUnfolderBase]: 328/682 cut-off events. [2023-11-17 11:23:08,989 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-17 11:23:08,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 682 events. 328/682 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3716 event pairs, 328 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 463. Up to 576 conditions per place. [2023-11-17 11:23:08,998 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 18 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-17 11:23:08,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 94 flow [2023-11-17 11:23:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:23:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:23:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 51 transitions. [2023-11-17 11:23:09,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2023-11-17 11:23:09,001 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 51 transitions. [2023-11-17 11:23:09,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 51 transitions. [2023-11-17 11:23:09,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:09,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 51 transitions. [2023-11-17 11:23:09,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,006 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,006 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 64 flow. Second operand 2 states and 51 transitions. [2023-11-17 11:23:09,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 94 flow [2023-11-17 11:23:09,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 24 transitions, 94 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:09,007 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 58 flow [2023-11-17 11:23:09,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-11-17 11:23:09,009 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-17 11:23:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 58 flow [2023-11-17 11:23:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:23:09,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:23:09,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash 8049344, now seen corresponding path program 1 times [2023-11-17 11:23:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:09,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669108393] [2023-11-17 11:23:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:09,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:09,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:09,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669108393] [2023-11-17 11:23:09,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669108393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:09,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:09,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:09,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722203635] [2023-11-17 11:23:09,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:09,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:09,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:09,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:09,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:09,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 66 [2023-11-17 11:23:09,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:09,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 66 [2023-11-17 11:23:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:09,204 INFO L124 PetriNetUnfolderBase]: 764/1332 cut-off events. [2023-11-17 11:23:09,204 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 11:23:09,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1332 events. 764/1332 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6675 event pairs, 344 based on Foata normal form. 0/1193 useless extension candidates. Maximal degree in co-relation 2681. Up to 786 conditions per place. [2023-11-17 11:23:09,210 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-17 11:23:09,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 181 flow [2023-11-17 11:23:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-17 11:23:09,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31313131313131315 [2023-11-17 11:23:09,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-17 11:23:09,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-17 11:23:09,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:09,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-17 11:23:09,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,218 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 58 flow. Second operand 3 states and 62 transitions. [2023-11-17 11:23:09,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 181 flow [2023-11-17 11:23:09,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 42 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:09,220 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 112 flow [2023-11-17 11:23:09,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-11-17 11:23:09,221 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-11-17 11:23:09,221 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 112 flow [2023-11-17 11:23:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:09,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:23:09,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:23:09,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:23:09,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1924674651, now seen corresponding path program 1 times [2023-11-17 11:23:09,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:09,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114819103] [2023-11-17 11:23:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:09,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:09,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:09,249 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:09,249 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:23:09,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:23:09,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:23:09,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:23:09,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:23:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:23:09,250 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 11:23:09,251 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:09,251 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:23:09,262 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:09,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,271 INFO L124 PetriNetUnfolderBase]: 11/94 cut-off events. [2023-11-17 11:23:09,272 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:23:09,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 11/94 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 289 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 75. Up to 8 conditions per place. [2023-11-17 11:23:09,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,274 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:09,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 50 transitions, 118 flow [2023-11-17 11:23:09,282 INFO L124 PetriNetUnfolderBase]: 11/94 cut-off events. [2023-11-17 11:23:09,282 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:23:09,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 11/94 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 289 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 75. Up to 8 conditions per place. [2023-11-17 11:23:09,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-11-17 11:23:09,780 INFO L134 LiptonReduction]: Checked pairs total: 7111 [2023-11-17 11:23:09,780 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:23:09,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:09,782 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;@352f3f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:09,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:23:09,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:09,784 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-17 11:23:09,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:09,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:09,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-17 11:23:09,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:23:09,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 336572, now seen corresponding path program 1 times [2023-11-17 11:23:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:09,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9657796] [2023-11-17 11:23:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:09,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:09,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:09,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9657796] [2023-11-17 11:23:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9657796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:09,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764028753] [2023-11-17 11:23:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:09,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:09,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 82 [2023-11-17 11:23:09,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:09,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 82 [2023-11-17 11:23:09,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:10,045 INFO L124 PetriNetUnfolderBase]: 3123/4913 cut-off events. [2023-11-17 11:23:10,045 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-17 11:23:10,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9605 conditions, 4913 events. 3123/4913 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30120 event pairs, 3123 based on Foata normal form. 0/4332 useless extension candidates. Maximal degree in co-relation 1453. Up to 4571 conditions per place. [2023-11-17 11:23:10,106 INFO L140 encePairwiseOnDemand]: 79/82 looper letters, 24 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-11-17 11:23:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 128 flow [2023-11-17 11:23:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:23:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:23:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 67 transitions. [2023-11-17 11:23:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2023-11-17 11:23:10,112 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 67 transitions. [2023-11-17 11:23:10,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 67 transitions. [2023-11-17 11:23:10,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:10,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 67 transitions. [2023-11-17 11:23:10,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:10,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:10,115 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:10,115 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 86 flow. Second operand 2 states and 67 transitions. [2023-11-17 11:23:10,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 128 flow [2023-11-17 11:23:10,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 31 transitions, 126 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:10,116 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 78 flow [2023-11-17 11:23:10,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-17 11:23:10,117 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-11-17 11:23:10,117 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 78 flow [2023-11-17 11:23:10,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:10,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:10,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:10,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:23:10,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:23:10,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 10433179, now seen corresponding path program 1 times [2023-11-17 11:23:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:10,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523784137] [2023-11-17 11:23:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523784137] [2023-11-17 11:23:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523784137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:10,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105095087] [2023-11-17 11:23:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:10,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 82 [2023-11-17 11:23:10,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:10,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 82 [2023-11-17 11:23:10,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:10,902 INFO L124 PetriNetUnfolderBase]: 9806/14457 cut-off events. [2023-11-17 11:23:10,903 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-17 11:23:10,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29066 conditions, 14457 events. 9806/14457 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 85953 event pairs, 4414 based on Foata normal form. 0/12900 useless extension candidates. Maximal degree in co-relation 29060. Up to 8420 conditions per place. [2023-11-17 11:23:11,022 INFO L140 encePairwiseOnDemand]: 70/82 looper letters, 46 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-17 11:23:11,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 244 flow [2023-11-17 11:23:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-17 11:23:11,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-11-17 11:23:11,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-17 11:23:11,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-17 11:23:11,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:11,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-17 11:23:11,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,027 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 78 flow. Second operand 3 states and 82 transitions. [2023-11-17 11:23:11,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 244 flow [2023-11-17 11:23:11,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:11,030 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 150 flow [2023-11-17 11:23:11,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2023-11-17 11:23:11,031 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-17 11:23:11,031 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 150 flow [2023-11-17 11:23:11,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:11,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:11,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:23:11,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:23:11,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1540206795, now seen corresponding path program 1 times [2023-11-17 11:23:11,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:11,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963185671] [2023-11-17 11:23:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:11,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:23:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963185671] [2023-11-17 11:23:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963185671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:23:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638538023] [2023-11-17 11:23:11,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:11,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:11,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:11,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:11,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 82 [2023-11-17 11:23:11,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:11,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 82 [2023-11-17 11:23:11,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:11,152 INFO L124 PetriNetUnfolderBase]: 147/542 cut-off events. [2023-11-17 11:23:11,152 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-11-17 11:23:11,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 542 events. 147/542 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3136 event pairs, 61 based on Foata normal form. 179/706 useless extension candidates. Maximal degree in co-relation 1327. Up to 283 conditions per place. [2023-11-17 11:23:11,154 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 14 selfloop transitions, 6 changer transitions 5/31 dead transitions. [2023-11-17 11:23:11,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 168 flow [2023-11-17 11:23:11,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2023-11-17 11:23:11,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2023-11-17 11:23:11,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 88 transitions. [2023-11-17 11:23:11,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 88 transitions. [2023-11-17 11:23:11,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:11,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 88 transitions. [2023-11-17 11:23:11,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 82.0) internal successors, (328), 4 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,159 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 150 flow. Second operand 3 states and 88 transitions. [2023-11-17 11:23:11,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 168 flow [2023-11-17 11:23:11,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 11:23:11,162 INFO L231 Difference]: Finished difference. Result has 37 places, 22 transitions, 72 flow [2023-11-17 11:23:11,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=22} [2023-11-17 11:23:11,163 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-11-17 11:23:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 22 transitions, 72 flow [2023-11-17 11:23:11,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:11,164 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:23:11,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:23:11,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:23:11,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1323280431, now seen corresponding path program 1 times [2023-11-17 11:23:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901520293] [2023-11-17 11:23:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:11,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:11,189 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:11,189 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:11,189 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:23:11,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:23:11,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:23:11,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:23:11,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:23:11,190 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:23:11,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:23:11,190 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:23:11,190 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:11,190 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:23:11,203 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:11,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,211 INFO L124 PetriNetUnfolderBase]: 14/120 cut-off events. [2023-11-17 11:23:11,211 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:23:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 14/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 380 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-11-17 11:23:11,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,212 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:11,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 150 flow [2023-11-17 11:23:11,217 INFO L124 PetriNetUnfolderBase]: 14/120 cut-off events. [2023-11-17 11:23:11,217 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:23:11,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 120 events. 14/120 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 380 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 106. Up to 10 conditions per place. [2023-11-17 11:23:11,219 INFO L119 LiptonReduction]: Number of co-enabled transitions 2600 [2023-11-17 11:23:11,767 INFO L134 LiptonReduction]: Checked pairs total: 12490 [2023-11-17 11:23:11,767 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-11-17 11:23:11,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:11,769 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;@352f3f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:11,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:23:11,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:11,770 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-17 11:23:11,770 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:11,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:11,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-17 11:23:11,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:23:11,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash 429460, now seen corresponding path program 1 times [2023-11-17 11:23:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305890722] [2023-11-17 11:23:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305890722] [2023-11-17 11:23:11,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305890722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:11,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:11,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839247738] [2023-11-17 11:23:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:11,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 104 [2023-11-17 11:23:11,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:11,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:11,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 104 [2023-11-17 11:23:11,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:13,402 INFO L124 PetriNetUnfolderBase]: 18128/27098 cut-off events. [2023-11-17 11:23:13,402 INFO L125 PetriNetUnfolderBase]: For 1921/1921 co-relation queries the response was YES. [2023-11-17 11:23:13,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52221 conditions, 27098 events. 18128/27098 cut-off events. For 1921/1921 co-relation queries the response was YES. Maximal size of possible extension queue 1530. Compared 195490 event pairs, 18128 based on Foata normal form. 0/25442 useless extension candidates. Maximal degree in co-relation 8440. Up to 24376 conditions per place. [2023-11-17 11:23:13,535 INFO L140 encePairwiseOnDemand]: 99/104 looper letters, 28 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2023-11-17 11:23:13,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 160 flow [2023-11-17 11:23:13,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:23:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:23:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 83 transitions. [2023-11-17 11:23:13,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39903846153846156 [2023-11-17 11:23:13,536 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 83 transitions. [2023-11-17 11:23:13,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 83 transitions. [2023-11-17 11:23:13,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:13,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 83 transitions. [2023-11-17 11:23:13,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 41.5) internal successors, (83), 2 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,538 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,538 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 114 flow. Second operand 2 states and 83 transitions. [2023-11-17 11:23:13,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 160 flow [2023-11-17 11:23:13,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 154 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:13,541 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 98 flow [2023-11-17 11:23:13,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-11-17 11:23:13,542 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-11-17 11:23:13,542 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 98 flow [2023-11-17 11:23:13,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:13,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:13,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:23:13,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:23:13,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:13,542 INFO L85 PathProgramCache]: Analyzing trace with hash 13315323, now seen corresponding path program 1 times [2023-11-17 11:23:13,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:13,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034972581] [2023-11-17 11:23:13,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:13,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:13,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034972581] [2023-11-17 11:23:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034972581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:13,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:13,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290260353] [2023-11-17 11:23:13,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:13,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:13,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 104 [2023-11-17 11:23:13,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:13,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:13,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 104 [2023-11-17 11:23:13,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:20,119 INFO L124 PetriNetUnfolderBase]: 105851/142656 cut-off events. [2023-11-17 11:23:20,119 INFO L125 PetriNetUnfolderBase]: For 2152/2152 co-relation queries the response was YES. [2023-11-17 11:23:20,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286551 conditions, 142656 events. 105851/142656 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 4191. Compared 923860 event pairs, 48011 based on Foata normal form. 0/127211 useless extension candidates. Maximal degree in co-relation 286544. Up to 82035 conditions per place. [2023-11-17 11:23:20,773 INFO L140 encePairwiseOnDemand]: 89/104 looper letters, 57 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2023-11-17 11:23:20,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 68 transitions, 307 flow [2023-11-17 11:23:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2023-11-17 11:23:20,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3269230769230769 [2023-11-17 11:23:20,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 102 transitions. [2023-11-17 11:23:20,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 102 transitions. [2023-11-17 11:23:20,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:20,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 102 transitions. [2023-11-17 11:23:20,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,776 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 98 flow. Second operand 3 states and 102 transitions. [2023-11-17 11:23:20,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 68 transitions, 307 flow [2023-11-17 11:23:20,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:20,782 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 188 flow [2023-11-17 11:23:20,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-17 11:23:20,783 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2023-11-17 11:23:20,783 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 188 flow [2023-11-17 11:23:20,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:20,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:20,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:23:20,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:23:20,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:20,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1637116153, now seen corresponding path program 1 times [2023-11-17 11:23:20,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:20,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344965311] [2023-11-17 11:23:20,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:20,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:23:20,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344965311] [2023-11-17 11:23:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344965311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:20,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:23:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111717052] [2023-11-17 11:23:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:20,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 104 [2023-11-17 11:23:20,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:20,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 104 [2023-11-17 11:23:20,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:20,901 INFO L124 PetriNetUnfolderBase]: 411/1450 cut-off events. [2023-11-17 11:23:20,901 INFO L125 PetriNetUnfolderBase]: For 632/632 co-relation queries the response was YES. [2023-11-17 11:23:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3532 conditions, 1450 events. 411/1450 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10631 event pairs, 181 based on Foata normal form. 643/2062 useless extension candidates. Maximal degree in co-relation 3523. Up to 715 conditions per place. [2023-11-17 11:23:20,905 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 16 selfloop transitions, 8 changer transitions 5/38 dead transitions. [2023-11-17 11:23:20,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 38 transitions, 209 flow [2023-11-17 11:23:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:23:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:23:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-17 11:23:20,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2023-11-17 11:23:20,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-17 11:23:20,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-17 11:23:20,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:20,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-17 11:23:20,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,907 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 188 flow. Second operand 3 states and 108 transitions. [2023-11-17 11:23:20,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 38 transitions, 209 flow [2023-11-17 11:23:20,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 11:23:20,911 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 94 flow [2023-11-17 11:23:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=104, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-17 11:23:20,912 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-17 11:23:20,912 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 94 flow [2023-11-17 11:23:20,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:20,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:20,912 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 11:23:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:23:20,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:23:20,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash 260974913, now seen corresponding path program 1 times [2023-11-17 11:23:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407352706] [2023-11-17 11:23:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:20,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:23:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:23:20,929 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:23:20,929 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 11:23:20,929 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 11:23:20,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:23:20,930 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 11:23:20,930 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:23:20,930 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 11:23:20,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:23:20,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,951 INFO L124 PetriNetUnfolderBase]: 17/146 cut-off events. [2023-11-17 11:23:20,951 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:20,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 146 events. 17/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 478 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2023-11-17 11:23:20,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,952 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:23:20,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 72 transitions, 184 flow [2023-11-17 11:23:20,958 INFO L124 PetriNetUnfolderBase]: 17/146 cut-off events. [2023-11-17 11:23:20,958 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:23:20,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 146 events. 17/146 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 478 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 138. Up to 12 conditions per place. [2023-11-17 11:23:20,961 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2023-11-17 11:23:21,597 INFO L134 LiptonReduction]: Checked pairs total: 18162 [2023-11-17 11:23:21,597 INFO L136 LiptonReduction]: Total number of compositions: 48 [2023-11-17 11:23:21,601 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:23:21,602 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;@352f3f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:23:21,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 11:23:21,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:23:21,603 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-11-17 11:23:21,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:23:21,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:21,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-17 11:23:21,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:23:21,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 544160, now seen corresponding path program 1 times [2023-11-17 11:23:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880327757] [2023-11-17 11:23:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:21,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880327757] [2023-11-17 11:23:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880327757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:21,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:21,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:21,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687604641] [2023-11-17 11:23:21,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:21,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:23:21,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:23:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:23:21,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 120 [2023-11-17 11:23:21,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 140 flow. Second operand has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:21,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:21,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 120 [2023-11-17 11:23:21,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:31,579 INFO L124 PetriNetUnfolderBase]: 136003/180873 cut-off events. [2023-11-17 11:23:31,579 INFO L125 PetriNetUnfolderBase]: For 15196/15196 co-relation queries the response was YES. [2023-11-17 11:23:31,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357622 conditions, 180873 events. 136003/180873 cut-off events. For 15196/15196 co-relation queries the response was YES. Maximal size of possible extension queue 8392. Compared 1267086 event pairs, 136003 based on Foata normal form. 0/166342 useless extension candidates. Maximal degree in co-relation 59920. Up to 172251 conditions per place. [2023-11-17 11:23:32,725 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 34 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-11-17 11:23:32,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 45 transitions, 198 flow [2023-11-17 11:23:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:23:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:23:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 99 transitions. [2023-11-17 11:23:32,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2023-11-17 11:23:32,726 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 99 transitions. [2023-11-17 11:23:32,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 99 transitions. [2023-11-17 11:23:32,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:23:32,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 99 transitions. [2023-11-17 11:23:32,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:32,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:32,727 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:32,727 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 140 flow. Second operand 2 states and 99 transitions. [2023-11-17 11:23:32,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 45 transitions, 198 flow [2023-11-17 11:23:32,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 186 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 11:23:32,732 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 118 flow [2023-11-17 11:23:32,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-11-17 11:23:32,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-11-17 11:23:32,733 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 118 flow [2023-11-17 11:23:32,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.5) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:32,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:23:32,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 11:23:32,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:23:32,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-11-17 11:23:32,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:23:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash 16870868, now seen corresponding path program 1 times [2023-11-17 11:23:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:23:32,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098716014] [2023-11-17 11:23:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:23:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:23:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:23:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:23:32,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:23:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098716014] [2023-11-17 11:23:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098716014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:23:32,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:23:32,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:23:32,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818736332] [2023-11-17 11:23:32,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:23:32,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:23:32,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:23:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:23:32,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:23:32,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 120 [2023-11-17 11:23:32,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:23:32,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:23:32,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 120 [2023-11-17 11:23:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand