/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:08:01,122 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:08:01,181 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:08:01,202 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:08:01,203 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:08:01,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:08:01,204 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:08:01,204 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:08:01,205 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:08:01,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:08:01,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:08:01,206 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:08:01,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:08:01,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:08:01,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:08:01,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:08:01,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:08:01,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:08:01,208 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:08:01,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:08:01,208 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:08:01,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:08:01,209 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:08:01,209 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:08:01,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:08:01,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:01,217 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:08:01,217 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:08:01,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:08:01,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:08:01,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:08:01,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:08:01,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:08:01,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:08:01,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:08:01,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:08:01,514 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:08:01,515 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:08:01,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i [2023-11-17 15:08:02,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:08:03,008 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:08:03,008 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2-pthread.i [2023-11-17 15:08:03,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dae25e9a8/49aaa257d8f44ba6a5dc56042db46b77/FLAGf84e9d498 [2023-11-17 15:08:03,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dae25e9a8/49aaa257d8f44ba6a5dc56042db46b77 [2023-11-17 15:08:03,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:08:03,041 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:08:03,044 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:03,044 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:08:03,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:08:03,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e89704a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03, skipping insertion in model container [2023-11-17 15:08:03,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,109 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:08:03,429 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/25_stack_longer-2-pthread.i[31355,31368] [2023-11-17 15:08:03,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:03,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:08:03,517 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/25_stack_longer-2-pthread.i[31355,31368] [2023-11-17 15:08:03,521 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:08:03,553 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:03,553 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:08:03,560 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:08:03,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03 WrapperNode [2023-11-17 15:08:03,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:08:03,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:03,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:08:03,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:08:03,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,625 INFO L138 Inliner]: procedures = 172, calls = 38, calls flagged for inlining = 9, calls inlined = 8, statements flattened = 133 [2023-11-17 15:08:03,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:08:03,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:08:03,633 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:08:03,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:08:03,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,652 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,655 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:08:03,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:08:03,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:08:03,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:08:03,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (1/1) ... [2023-11-17 15:08:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:08:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:08:03,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:08:03,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:08:03,755 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:08:03,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:08:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:08:03,756 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:08:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:08:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:08:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:08:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:08:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:08:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:08:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:08:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:08:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:08:03,760 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:08:03,936 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:08:03,938 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:08:04,209 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:08:04,280 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:08:04,281 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:08:04,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:04 BoogieIcfgContainer [2023-11-17 15:08:04,282 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:08:04,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:08:04,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:08:04,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:08:04,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:08:03" (1/3) ... [2023-11-17 15:08:04,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaf1574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:04, skipping insertion in model container [2023-11-17 15:08:04,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:08:03" (2/3) ... [2023-11-17 15:08:04,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aaf1574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:08:04, skipping insertion in model container [2023-11-17 15:08:04,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:08:04" (3/3) ... [2023-11-17 15:08:04,290 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-2-pthread.i [2023-11-17 15:08:04,306 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:08:04,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:08:04,306 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:08:04,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:04,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,473 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-11-17 15:08:04,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:04,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 9/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-17 15:08:04,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,488 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:04,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,501 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 115 transitions, 234 flow [2023-11-17 15:08:04,527 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-11-17 15:08:04,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 126 events. 9/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2023-11-17 15:08:04,530 INFO L119 LiptonReduction]: Number of co-enabled transitions 2044 [2023-11-17 15:08:09,623 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2023-11-17 15:08:09,623 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 15:08:09,638 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:09,643 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;@67540cc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:09,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:08:09,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:09,648 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:08:09,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:09,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:09,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:08:09,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:08:09,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 548047968, now seen corresponding path program 1 times [2023-11-17 15:08:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:09,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024633432] [2023-11-17 15:08:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:09,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:09,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:09,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024633432] [2023-11-17 15:08:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024633432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:09,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:09,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:08:09,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295828966] [2023-11-17 15:08:09,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:09,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-17 15:08:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-17 15:08:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-17 15:08:09,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 236 [2023-11-17 15:08:09,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 11 transitions, 26 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:09,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:09,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 236 [2023-11-17 15:08:09,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:09,939 INFO L124 PetriNetUnfolderBase]: 7/21 cut-off events. [2023-11-17 15:08:09,939 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:08:09,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 21 events. 7/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 34 event pairs, 4 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-17 15:08:09,941 INFO L140 encePairwiseOnDemand]: 233/236 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-17 15:08:09,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-17 15:08:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-17 15:08:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-17 15:08:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 210 transitions. [2023-11-17 15:08:09,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449152542372881 [2023-11-17 15:08:09,959 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 210 transitions. [2023-11-17 15:08:09,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 210 transitions. [2023-11-17 15:08:09,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:09,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 210 transitions. [2023-11-17 15:08:09,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:09,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:09,975 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:09,976 INFO L175 Difference]: Start difference. First operand has 12 places, 11 transitions, 26 flow. Second operand 2 states and 210 transitions. [2023-11-17 15:08:09,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-17 15:08:09,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:09,979 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-17 15:08:09,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-17 15:08:09,985 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-17 15:08:09,985 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-17 15:08:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:09,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:09,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:08:09,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:08:09,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:08:09,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash -190470873, now seen corresponding path program 1 times [2023-11-17 15:08:09,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:09,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297913551] [2023-11-17 15:08:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:10,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:10,092 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:10,092 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:10,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:08:10,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:08:10,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:08:10,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:08:10,097 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:08:10,100 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:10,100 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:08:10,158 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:10,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,227 INFO L124 PetriNetUnfolderBase]: 17/213 cut-off events. [2023-11-17 15:08:10,228 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:10,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 213 events. 17/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 393 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2023-11-17 15:08:10,234 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,237 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:10,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,237 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 189 transitions, 388 flow [2023-11-17 15:08:10,277 INFO L124 PetriNetUnfolderBase]: 17/213 cut-off events. [2023-11-17 15:08:10,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 213 events. 17/213 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 393 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 159. Up to 6 conditions per place. [2023-11-17 15:08:10,289 INFO L119 LiptonReduction]: Number of co-enabled transitions 14892 [2023-11-17 15:08:15,233 INFO L134 LiptonReduction]: Checked pairs total: 26484 [2023-11-17 15:08:15,234 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-11-17 15:08:15,236 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:15,237 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;@67540cc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:15,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:08:15,241 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:15,242 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-11-17 15:08:15,242 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:08:15,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:15,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:08:15,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:08:15,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1592788169, now seen corresponding path program 1 times [2023-11-17 15:08:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732246788] [2023-11-17 15:08:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:15,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:15,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:15,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:15,335 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:08:15,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:08:15,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:08:15,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:08:15,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:08:15,340 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-17 15:08:15,340 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:15,340 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:08:15,386 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:15,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,431 INFO L124 PetriNetUnfolderBase]: 25/300 cut-off events. [2023-11-17 15:08:15,431 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:15,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 300 events. 25/300 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 776 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 232. Up to 8 conditions per place. [2023-11-17 15:08:15,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,441 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:15,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 263 transitions, 544 flow [2023-11-17 15:08:15,483 INFO L124 PetriNetUnfolderBase]: 25/300 cut-off events. [2023-11-17 15:08:15,483 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:08:15,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313 conditions, 300 events. 25/300 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 776 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 232. Up to 8 conditions per place. [2023-11-17 15:08:15,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 38544 [2023-11-17 15:08:21,198 INFO L134 LiptonReduction]: Checked pairs total: 70874 [2023-11-17 15:08:21,199 INFO L136 LiptonReduction]: Total number of compositions: 231 [2023-11-17 15:08:21,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:21,202 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;@67540cc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:21,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:08:21,206 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:21,207 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 15:08:21,207 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:21,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:21,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:21,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:21,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -28154382, now seen corresponding path program 1 times [2023-11-17 15:08:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:21,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637517556] [2023-11-17 15:08:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:21,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637517556] [2023-11-17 15:08:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637517556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:21,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171116484] [2023-11-17 15:08:21,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:21,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:21,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 494 [2023-11-17 15:08:21,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:21,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:21,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 494 [2023-11-17 15:08:21,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:24,583 INFO L124 PetriNetUnfolderBase]: 23321/34794 cut-off events. [2023-11-17 15:08:24,583 INFO L125 PetriNetUnfolderBase]: For 1624/1624 co-relation queries the response was YES. [2023-11-17 15:08:24,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66926 conditions, 34794 events. 23321/34794 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 1529. Compared 248037 event pairs, 5509 based on Foata normal form. 216/27225 useless extension candidates. Maximal degree in co-relation 23244. Up to 27111 conditions per place. [2023-11-17 15:08:24,877 INFO L140 encePairwiseOnDemand]: 482/494 looper letters, 106 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2023-11-17 15:08:24,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 516 flow [2023-11-17 15:08:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 758 transitions. [2023-11-17 15:08:24,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114709851551957 [2023-11-17 15:08:24,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 758 transitions. [2023-11-17 15:08:24,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 758 transitions. [2023-11-17 15:08:24,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:24,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 758 transitions. [2023-11-17 15:08:24,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 252.66666666666666) internal successors, (758), 3 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:24,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:24,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:24,895 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 180 flow. Second operand 3 states and 758 transitions. [2023-11-17 15:08:24,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 516 flow [2023-11-17 15:08:24,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 131 transitions, 512 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:08:24,902 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 218 flow [2023-11-17 15:08:24,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2023-11-17 15:08:24,903 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-11-17 15:08:24,904 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 218 flow [2023-11-17 15:08:24,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:24,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:24,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:24,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:08:24,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:24,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:24,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1970378508, now seen corresponding path program 1 times [2023-11-17 15:08:24,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371277794] [2023-11-17 15:08:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:24,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:24,997 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 15:08:24,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:24,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371277794] [2023-11-17 15:08:24,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371277794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:24,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:24,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:24,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582038687] [2023-11-17 15:08:24,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:24,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:25,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 494 [2023-11-17 15:08:25,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:25,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:25,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 494 [2023-11-17 15:08:25,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:29,273 INFO L124 PetriNetUnfolderBase]: 36618/53833 cut-off events. [2023-11-17 15:08:29,273 INFO L125 PetriNetUnfolderBase]: For 7376/7386 co-relation queries the response was YES. [2023-11-17 15:08:29,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109421 conditions, 53833 events. 36618/53833 cut-off events. For 7376/7386 co-relation queries the response was YES. Maximal size of possible extension queue 2740. Compared 411108 event pairs, 7488 based on Foata normal form. 766/42782 useless extension candidates. Maximal degree in co-relation 75087. Up to 40609 conditions per place. [2023-11-17 15:08:29,698 INFO L140 encePairwiseOnDemand]: 487/494 looper letters, 89 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-11-17 15:08:29,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 496 flow [2023-11-17 15:08:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:08:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:08:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-11-17 15:08:29,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851551956815115 [2023-11-17 15:08:29,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-11-17 15:08:29,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-11-17 15:08:29,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:29,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-11-17 15:08:29,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:29,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:29,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 494.0) internal successors, (1976), 4 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:29,710 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 218 flow. Second operand 3 states and 719 transitions. [2023-11-17 15:08:29,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 496 flow [2023-11-17 15:08:29,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:08:29,743 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 236 flow [2023-11-17 15:08:29,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2023-11-17 15:08:29,745 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 4 predicate places. [2023-11-17 15:08:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 236 flow [2023-11-17 15:08:29,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:29,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:29,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:08:29,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:29,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash -826166008, now seen corresponding path program 1 times [2023-11-17 15:08:29,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:29,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616685183] [2023-11-17 15:08:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:29,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616685183] [2023-11-17 15:08:29,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616685183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:29,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:08:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658535902] [2023-11-17 15:08:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:08:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:08:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:08:29,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 494 [2023-11-17 15:08:29,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:29,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:29,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 494 [2023-11-17 15:08:29,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:08:35,311 INFO L124 PetriNetUnfolderBase]: 52287/74760 cut-off events. [2023-11-17 15:08:35,311 INFO L125 PetriNetUnfolderBase]: For 9029/9036 co-relation queries the response was YES. [2023-11-17 15:08:35,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158221 conditions, 74760 events. 52287/74760 cut-off events. For 9029/9036 co-relation queries the response was YES. Maximal size of possible extension queue 3485. Compared 566592 event pairs, 9912 based on Foata normal form. 0/59335 useless extension candidates. Maximal degree in co-relation 120238. Up to 45793 conditions per place. [2023-11-17 15:08:36,024 INFO L140 encePairwiseOnDemand]: 486/494 looper letters, 193 selfloop transitions, 9 changer transitions 0/222 dead transitions. [2023-11-17 15:08:36,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 222 transitions, 1002 flow [2023-11-17 15:08:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:08:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:08:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1369 transitions. [2023-11-17 15:08:36,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618758434547908 [2023-11-17 15:08:36,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1369 transitions. [2023-11-17 15:08:36,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1369 transitions. [2023-11-17 15:08:36,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:08:36,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1369 transitions. [2023-11-17 15:08:36,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.16666666666666) internal successors, (1369), 6 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:36,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:36,040 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 494.0) internal successors, (3458), 7 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:36,041 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 236 flow. Second operand 6 states and 1369 transitions. [2023-11-17 15:08:36,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 222 transitions, 1002 flow [2023-11-17 15:08:36,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 222 transitions, 996 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:08:36,049 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 282 flow [2023-11-17 15:08:36,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=494, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2023-11-17 15:08:36,052 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2023-11-17 15:08:36,053 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 282 flow [2023-11-17 15:08:36,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.2) internal successors, (986), 5 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:36,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:36,054 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:08:36,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:08:36,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:08:36,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1380911436, now seen corresponding path program 1 times [2023-11-17 15:08:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:36,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114053729] [2023-11-17 15:08:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:36,073 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:08:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:08:36,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:08:36,101 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:08:36,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:08:36,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:08:36,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:08:36,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:08:36,102 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:08:36,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:08:36,103 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:08:36,104 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:08:36,104 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:08:36,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:08:36,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,258 INFO L124 PetriNetUnfolderBase]: 33/387 cut-off events. [2023-11-17 15:08:36,259 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:36,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 387 events. 33/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1221 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 308. Up to 10 conditions per place. [2023-11-17 15:08:36,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,269 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,270 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:08:36,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,270 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 337 transitions, 702 flow [2023-11-17 15:08:36,338 INFO L124 PetriNetUnfolderBase]: 33/387 cut-off events. [2023-11-17 15:08:36,338 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:08:36,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 387 events. 33/387 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1221 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 308. Up to 10 conditions per place. [2023-11-17 15:08:36,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 73000 [2023-11-17 15:08:43,361 INFO L134 LiptonReduction]: Checked pairs total: 133650 [2023-11-17 15:08:43,361 INFO L136 LiptonReduction]: Total number of compositions: 299 [2023-11-17 15:08:43,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:08:43,363 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;@67540cc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:08:43,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:08:43,367 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:08:43,367 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-11-17 15:08:43,367 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 15:08:43,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:08:43,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:08:43,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:08:43,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:08:43,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1361133701, now seen corresponding path program 1 times [2023-11-17 15:08:43,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:08:43,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791523808] [2023-11-17 15:08:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:08:43,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:08:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:08:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:08:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:08:43,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791523808] [2023-11-17 15:08:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791523808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:08:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:08:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:08:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814719450] [2023-11-17 15:08:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:08:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:08:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:08:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:08:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:08:43,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 636 [2023-11-17 15:08:43,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:08:43,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:08:43,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 636 [2023-11-17 15:08:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand