/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/37_stack_lock_p0_vs_concur-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:22:05,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:22:05,150 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 11:22:05,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:22:05,171 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:22:05,171 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:22:05,172 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:22:05,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:22:05,173 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:22:05,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:22:05,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:22:05,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:22:05,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:22:05,174 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:22:05,175 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:22:05,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:22:05,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:22:05,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:22:05,176 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:22:05,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:22:05,176 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:22:05,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:22:05,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:22:05,178 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:22:05,178 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:22:05,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:05,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:22:05,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:22:05,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:22:05,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:22:05,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:22:05,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:22:05,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:22:05,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:22:05,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:22:05,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:22:05,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:22:05,398 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:22:05,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 11:22:06,583 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:22:06,838 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:22:06,843 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 11:22:06,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9db7d24d3/c3acbc136f9b4290b821c48113315d76/FLAG41b2e7994 [2023-11-17 11:22:06,867 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9db7d24d3/c3acbc136f9b4290b821c48113315d76 [2023-11-17 11:22:06,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:22:06,871 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:22:06,872 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:06,872 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:22:06,876 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:22:06,876 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19f4cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:06, skipping insertion in model container [2023-11-17 11:22:06,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:22:06" (1/1) ... [2023-11-17 11:22:06,935 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:22:07,194 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/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-17 11:22:07,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:07,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:22:07,258 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/37_stack_lock_p0_vs_concur-pthread.i[31028,31041] [2023-11-17 11:22:07,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:22:07,294 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:22:07,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07 WrapperNode [2023-11-17 11:22:07,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:22:07,298 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:07,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:22:07,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:22:07,304 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,358 INFO L138 Inliner]: procedures = 165, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 80 [2023-11-17 11:22:07,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:22:07,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:22:07,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:22:07,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:22:07,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,372 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,389 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:22:07,394 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:22:07,394 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:22:07,395 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:22:07,395 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (1/1) ... [2023-11-17 11:22:07,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:22:07,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:22:07,442 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 11:22:07,445 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 11:22:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 11:22:07,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:22:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:22:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:22:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:22:07,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:22:07,471 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 11:22:07,600 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:22:07,602 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:22:07,739 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:22:07,898 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:22:07,899 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 11:22:07,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:07 BoogieIcfgContainer [2023-11-17 11:22:07,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:22:07,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:22:07,906 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:22:07,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:22:07,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:22:06" (1/3) ... [2023-11-17 11:22:07,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1972b035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:07, skipping insertion in model container [2023-11-17 11:22:07,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:22:07" (2/3) ... [2023-11-17 11:22:07,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1972b035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:22:07, skipping insertion in model container [2023-11-17 11:22:07,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:22:07" (3/3) ... [2023-11-17 11:22:07,912 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur-pthread.i [2023-11-17 11:22:07,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:22:07,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:22:07,928 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:22:07,962 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,030 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 11:22:08,030 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:08,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 3 conditions per place. [2023-11-17 11:22:08,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,042 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:08,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,055 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 22 transitions, 48 flow [2023-11-17 11:22:08,066 INFO L124 PetriNetUnfolderBase]: 3/24 cut-off events. [2023-11-17 11:22:08,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:08,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 3/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 3 conditions per place. [2023-11-17 11:22:08,067 INFO L119 LiptonReduction]: Number of co-enabled transitions 128 [2023-11-17 11:22:08,398 INFO L134 LiptonReduction]: Checked pairs total: 372 [2023-11-17 11:22:08,398 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 11:22:08,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:08,425 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;@5848a5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:08,425 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 11:22:08,430 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:08,430 INFO L124 PetriNetUnfolderBase]: 1/12 cut-off events. [2023-11-17 11:22:08,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:22:08,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:08,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 11:22:08,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 11:22:08,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:08,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1025255665, now seen corresponding path program 1 times [2023-11-17 11:22:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:08,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757864814] [2023-11-17 11:22:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:08,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:08,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:08,589 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:08,591 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:08,592 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 11:22:08,595 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 11:22:08,596 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 11:22:08,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:22:08,597 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 11:22:08,605 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:08,605 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:22:08,630 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,647 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 11:22:08,647 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:08,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 6/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2023-11-17 11:22:08,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,649 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:08,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,650 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 39 transitions, 88 flow [2023-11-17 11:22:08,672 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-11-17 11:22:08,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:22:08,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 6/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 90 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 35. Up to 3 conditions per place. [2023-11-17 11:22:08,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 800 [2023-11-17 11:22:08,916 INFO L134 LiptonReduction]: Checked pairs total: 3635 [2023-11-17 11:22:08,916 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:22:08,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:08,921 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;@5848a5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:08,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:22:08,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:08,924 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 11:22:08,924 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:22:08,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:08,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:22:08,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:08,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:08,925 INFO L85 PathProgramCache]: Analyzing trace with hash 454429372, now seen corresponding path program 1 times [2023-11-17 11:22:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:08,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898034] [2023-11-17 11:22:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:08,987 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 11:22:08,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898034] [2023-11-17 11:22:08,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:08,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:08,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:08,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064588513] [2023-11-17 11:22:08,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:08,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:22:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:22:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:22:09,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2023-11-17 11:22:09,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 76 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 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 11:22:09,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:09,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2023-11-17 11:22:09,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:09,242 INFO L124 PetriNetUnfolderBase]: 526/883 cut-off events. [2023-11-17 11:22:09,242 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 11:22:09,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1774 conditions, 883 events. 526/883 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3540 event pairs, 463 based on Foata normal form. 0/814 useless extension candidates. Maximal degree in co-relation 1450. Up to 856 conditions per place. [2023-11-17 11:22:09,251 INFO L140 encePairwiseOnDemand]: 50/55 looper letters, 23 selfloop transitions, 0 changer transitions 0/28 dead transitions. [2023-11-17 11:22:09,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 112 flow [2023-11-17 11:22:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:22:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:22:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2023-11-17 11:22:09,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-17 11:22:09,262 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 54 transitions. [2023-11-17 11:22:09,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 54 transitions. [2023-11-17 11:22:09,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:09,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 54 transitions. [2023-11-17 11:22:09,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 27.0) internal successors, (54), 2 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:09,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 11:22:09,269 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 11:22:09,271 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 76 flow. Second operand 2 states and 54 transitions. [2023-11-17 11:22:09,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 112 flow [2023-11-17 11:22:09,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:09,275 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 66 flow [2023-11-17 11:22:09,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-11-17 11:22:09,279 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-11-17 11:22:09,280 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 66 flow [2023-11-17 11:22:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 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 11:22:09,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:09,280 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-17 11:22:09,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:22:09,281 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 11:22:09,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash -890695618, now seen corresponding path program 1 times [2023-11-17 11:22:09,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:09,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609398526] [2023-11-17 11:22:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:09,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:09,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:09,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:09,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:09,342 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 11:22:09,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 11:22:09,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 11:22:09,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 11:22:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:22:09,343 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:09,344 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:09,344 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:22:09,371 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:09,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,386 INFO L124 PetriNetUnfolderBase]: 9/64 cut-off events. [2023-11-17 11:22:09,386 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 9/64 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 159 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-17 11:22:09,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,389 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:09,389 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 130 flow [2023-11-17 11:22:09,399 INFO L124 PetriNetUnfolderBase]: 9/64 cut-off events. [2023-11-17 11:22:09,399 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 11:22:09,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 64 events. 9/64 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 159 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-11-17 11:22:09,402 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-11-17 11:22:09,807 INFO L134 LiptonReduction]: Checked pairs total: 9032 [2023-11-17 11:22:09,808 INFO L136 LiptonReduction]: Total number of compositions: 24 [2023-11-17 11:22:09,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:09,814 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;@5848a5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:09,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:22:09,817 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:09,817 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 11:22:09,817 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:22:09,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:09,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:22:09,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:09,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:09,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1710051705, now seen corresponding path program 1 times [2023-11-17 11:22:09,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:09,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394807904] [2023-11-17 11:22:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:09,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:09,871 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 11:22:09,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394807904] [2023-11-17 11:22:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394807904] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:09,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:09,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615030856] [2023-11-17 11:22:09,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:22:09,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:22:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:22:09,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 80 [2023-11-17 11:22:09,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 112 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 11:22:09,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:09,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 80 [2023-11-17 11:22:09,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:11,105 INFO L124 PetriNetUnfolderBase]: 8602/12079 cut-off events. [2023-11-17 11:22:11,105 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2023-11-17 11:22:11,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24439 conditions, 12079 events. 8602/12079 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 61756 event pairs, 7639 based on Foata normal form. 0/11056 useless extension candidates. Maximal degree in co-relation 13895. Up to 11924 conditions per place. [2023-11-17 11:22:11,207 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 33 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2023-11-17 11:22:11,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 164 flow [2023-11-17 11:22:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:22:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:22:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 78 transitions. [2023-11-17 11:22:11,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2023-11-17 11:22:11,209 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 78 transitions. [2023-11-17 11:22:11,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 78 transitions. [2023-11-17 11:22:11,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:11,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 78 transitions. [2023-11-17 11:22:11,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 39.0) internal successors, (78), 2 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:22:11,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 11:22:11,212 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 11:22:11,212 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 112 flow. Second operand 2 states and 78 transitions. [2023-11-17 11:22:11,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 164 flow [2023-11-17 11:22:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 162 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:11,214 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 96 flow [2023-11-17 11:22:11,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 11:22:11,215 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-11-17 11:22:11,216 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 96 flow [2023-11-17 11:22:11,216 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 11:22:11,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:11,216 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-17 11:22:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:22:11,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 11:22:11,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2078610482, now seen corresponding path program 1 times [2023-11-17 11:22:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522145048] [2023-11-17 11:22:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:11,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:11,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:22:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:22:11,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:22:11,249 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:22:11,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:22:11,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:22:11,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:22:11,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:22:11,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:22:11,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:22:11,251 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 11:22:11,251 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:22:11,252 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 11:22:11,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 11:22:11,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,291 INFO L124 PetriNetUnfolderBase]: 12/84 cut-off events. [2023-11-17 11:22:11,292 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:11,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 84 events. 12/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 231 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 76. Up to 5 conditions per place. [2023-11-17 11:22:11,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,294 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:22:11,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 73 transitions, 174 flow [2023-11-17 11:22:11,302 INFO L124 PetriNetUnfolderBase]: 12/84 cut-off events. [2023-11-17 11:22:11,303 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 11:22:11,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 84 events. 12/84 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 231 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 76. Up to 5 conditions per place. [2023-11-17 11:22:11,305 INFO L119 LiptonReduction]: Number of co-enabled transitions 3776 [2023-11-17 11:22:11,953 INFO L134 LiptonReduction]: Checked pairs total: 16944 [2023-11-17 11:22:11,953 INFO L136 LiptonReduction]: Total number of compositions: 32 [2023-11-17 11:22:11,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:22:11,959 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;@5848a5c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:22:11,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:22:11,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:22:11,961 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-11-17 11:22:11,961 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:22:11,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:11,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 11:22:11,965 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:11,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:11,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1160036421, now seen corresponding path program 1 times [2023-11-17 11:22:11,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:11,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994143437] [2023-11-17 11:22:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:11,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:11,997 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 11:22:11,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:11,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994143437] [2023-11-17 11:22:11,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994143437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:11,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:11,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:22:11,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254683382] [2023-11-17 11:22:11,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:11,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 11:22:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 11:22:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 11:22:12,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 105 [2023-11-17 11:22:12,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 150 flow. Second operand has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 11:22:12,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:12,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 105 [2023-11-17 11:22:12,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:22:23,930 INFO L124 PetriNetUnfolderBase]: 119378/153959 cut-off events. [2023-11-17 11:22:23,930 INFO L125 PetriNetUnfolderBase]: For 11222/11222 co-relation queries the response was YES. [2023-11-17 11:22:24,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312040 conditions, 153959 events. 119378/153959 cut-off events. For 11222/11222 co-relation queries the response was YES. Maximal size of possible extension queue 2994. Compared 883351 event pairs, 106415 based on Foata normal form. 0/140434 useless extension candidates. Maximal degree in co-relation 70701. Up to 152644 conditions per place. [2023-11-17 11:22:24,950 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 43 selfloop transitions, 0 changer transitions 0/52 dead transitions. [2023-11-17 11:22:24,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 218 flow [2023-11-17 11:22:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 11:22:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 11:22:24,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 102 transitions. [2023-11-17 11:22:24,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-11-17 11:22:24,952 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 102 transitions. [2023-11-17 11:22:24,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 102 transitions. [2023-11-17 11:22:24,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:22:24,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 102 transitions. [2023-11-17 11:22:24,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 51.0) internal successors, (102), 2 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 11:22:24,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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 11:22:24,954 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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 11:22:24,954 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 150 flow. Second operand 2 states and 102 transitions. [2023-11-17 11:22:24,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 218 flow [2023-11-17 11:22:24,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 212 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-17 11:22:24,978 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 126 flow [2023-11-17 11:22:24,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-17 11:22:24,981 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2023-11-17 11:22:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 126 flow [2023-11-17 11:22:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 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 11:22:24,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:22:24,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:22:24,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:22:24,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 11:22:24,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:22:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash 663000475, now seen corresponding path program 1 times [2023-11-17 11:22:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:22:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713633506] [2023-11-17 11:22:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:22:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:22:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:22:25,105 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 11:22:25,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:22:25,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713633506] [2023-11-17 11:22:25,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713633506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:22:25,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:22:25,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:22:25,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806463545] [2023-11-17 11:22:25,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:22:25,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:22:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:22:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:22:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:22:25,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 105 [2023-11-17 11:22:25,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 11:22:25,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:22:25,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 105 [2023-11-17 11:22:25,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:23:11,301 INFO L124 PetriNetUnfolderBase]: 477620/617883 cut-off events. [2023-11-17 11:23:11,302 INFO L125 PetriNetUnfolderBase]: For 18599/18599 co-relation queries the response was YES. [2023-11-17 11:23:13,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246787 conditions, 617883 events. 477620/617883 cut-off events. For 18599/18599 co-relation queries the response was YES. Maximal size of possible extension queue 10328. Compared 4050872 event pairs, 105580 based on Foata normal form. 0/593649 useless extension candidates. Maximal degree in co-relation 1246780. Up to 213593 conditions per place.