/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 23:11:04,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 23:11:04,503 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-VariableLbe.epf [2023-08-23 23:11:04,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 23:11:04,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 23:11:04,545 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 23:11:04,546 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 23:11:04,547 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 23:11:04,547 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 23:11:04,551 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 23:11:04,551 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 23:11:04,551 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 23:11:04,551 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 23:11:04,553 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 23:11:04,553 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 23:11:04,553 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 23:11:04,553 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 23:11:04,553 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 23:11:04,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 23:11:04,554 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 23:11:04,554 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 23:11:04,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 23:11:04,555 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 23:11:04,555 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 23:11:04,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 23:11:04,556 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 23:11:04,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 23:11:04,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:11:04,557 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 23:11:04,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 23:11:04,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 23:11:04,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 23:11:04,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 23:11:04,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 23:11:04,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 23:11:04,559 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 23:11:04,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 23:11:04,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 23:11:04,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 23:11:04,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 23:11:04,892 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 23:11:04,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2023-08-23 23:11:06,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 23:11:06,368 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 23:11:06,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2023-08-23 23:11:06,382 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb44d58c/5f30783572444fdd9b9cf31c3f6d504c/FLAGe590e7d5b [2023-08-23 23:11:06,397 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb44d58c/5f30783572444fdd9b9cf31c3f6d504c [2023-08-23 23:11:06,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 23:11:06,401 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 23:11:06,401 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 23:11:06,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 23:11:06,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 23:11:06,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455ede09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06, skipping insertion in model container [2023-08-23 23:11:06,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,443 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 23:11:06,614 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-wmm/safe026_tso.i[945,958] [2023-08-23 23:11:06,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:11:06,789 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 23:11:06,803 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-wmm/safe026_tso.i[945,958] [2023-08-23 23:11:06,822 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-23 23:11:06,824 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-23 23:11:06,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 23:11:06,881 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 23:11:06,881 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 23:11:06,888 INFO L206 MainTranslator]: Completed translation [2023-08-23 23:11:06,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06 WrapperNode [2023-08-23 23:11:06,889 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 23:11:06,890 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 23:11:06,890 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 23:11:06,890 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 23:11:06,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,950 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-08-23 23:11:06,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 23:11:06,951 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 23:11:06,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 23:11:06,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 23:11:06,959 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,959 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,979 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,985 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 23:11:06,986 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 23:11:06,986 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 23:11:06,986 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 23:11:06,986 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (1/1) ... [2023-08-23 23:11:06,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 23:11:07,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 23:11:07,021 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) [2023-08-23 23:11:07,049 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 [2023-08-23 23:11:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 23:11:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 23:11:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 23:11:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 23:11:07,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 23:11:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-23 23:11:07,068 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-23 23:11:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-23 23:11:07,068 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-23 23:11:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-23 23:11:07,068 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-23 23:11:07,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 23:11:07,069 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 23:11:07,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 23:11:07,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 23:11:07,071 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-23 23:11:07,230 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 23:11:07,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 23:11:07,419 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 23:11:07,425 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 23:11:07,426 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-23 23:11:07,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:11:07 BoogieIcfgContainer [2023-08-23 23:11:07,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 23:11:07,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 23:11:07,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 23:11:07,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 23:11:07,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 11:11:06" (1/3) ... [2023-08-23 23:11:07,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673f1f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:11:07, skipping insertion in model container [2023-08-23 23:11:07,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 11:11:06" (2/3) ... [2023-08-23 23:11:07,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673f1f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 11:11:07, skipping insertion in model container [2023-08-23 23:11:07,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 11:11:07" (3/3) ... [2023-08-23 23:11:07,437 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_tso.i [2023-08-23 23:11:07,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 23:11:07,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 23:11:07,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 23:11:07,530 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 23:11:07,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 83 transitions, 181 flow [2023-08-23 23:11:07,625 INFO L124 PetriNetUnfolderBase]: 2/80 cut-off events. [2023-08-23 23:11:07,625 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:11:07,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 80 events. 2/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2023-08-23 23:11:07,630 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 83 transitions, 181 flow [2023-08-23 23:11:07,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 68 transitions, 145 flow [2023-08-23 23:11:07,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 23:11:07,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 68 transitions, 145 flow [2023-08-23 23:11:07,659 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 68 transitions, 145 flow [2023-08-23 23:11:07,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 68 transitions, 145 flow [2023-08-23 23:11:07,689 INFO L124 PetriNetUnfolderBase]: 1/68 cut-off events. [2023-08-23 23:11:07,689 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:11:07,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 68 events. 1/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 35 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-08-23 23:11:07,692 INFO L119 LiptonReduction]: Number of co-enabled transitions 974 [2023-08-23 23:11:09,735 INFO L134 LiptonReduction]: Checked pairs total: 1736 [2023-08-23 23:11:09,736 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-23 23:11:09,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 23:11:09,761 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=LoopsAndPotentialCycles, 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;@21944f67, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 23:11:09,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-23 23:11:09,770 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 23:11:09,771 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-23 23:11:09,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 23:11:09,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:09,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:09,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:09,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:09,778 INFO L85 PathProgramCache]: Analyzing trace with hash 773119812, now seen corresponding path program 1 times [2023-08-23 23:11:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152756875] [2023-08-23 23:11:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:10,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152756875] [2023-08-23 23:11:10,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152756875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:10,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:10,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-23 23:11:10,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001354498] [2023-08-23 23:11:10,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:10,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:11:10,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:11:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:11:10,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 141 [2023-08-23 23:11:10,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-08-23 23:11:10,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:10,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 141 [2023-08-23 23:11:10,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:10,424 INFO L124 PetriNetUnfolderBase]: 381/628 cut-off events. [2023-08-23 23:11:10,424 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-23 23:11:10,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1303 conditions, 628 events. 381/628 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2533 event pairs, 117 based on Foata normal form. 26/654 useless extension candidates. Maximal degree in co-relation 1292. Up to 439 conditions per place. [2023-08-23 23:11:10,434 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 22 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-08-23 23:11:10,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 120 flow [2023-08-23 23:11:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:11:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:11:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-23 23:11:10,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5602836879432624 [2023-08-23 23:11:10,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-23 23:11:10,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-23 23:11:10,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:10,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-23 23:11:10,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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) [2023-08-23 23:11:10,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-23 23:11:10,455 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-23 23:11:10,457 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states and 237 transitions. [2023-08-23 23:11:10,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 120 flow [2023-08-23 23:11:10,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 116 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-23 23:11:10,461 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 76 flow [2023-08-23 23:11:10,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-23 23:11:10,465 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-23 23:11:10,465 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 76 flow [2023-08-23 23:11:10,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2023-08-23 23:11:10,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:10,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:10,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 23:11:10,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:10,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1803090255, now seen corresponding path program 1 times [2023-08-23 23:11:10,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:10,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912882525] [2023-08-23 23:11:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912882525] [2023-08-23 23:11:10,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912882525] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:10,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:10,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:11:10,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649631924] [2023-08-23 23:11:10,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:10,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:11:10,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:11:10,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:11:10,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 141 [2023-08-23 23:11:10,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-23 23:11:10,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:10,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 141 [2023-08-23 23:11:10,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:10,673 INFO L124 PetriNetUnfolderBase]: 359/594 cut-off events. [2023-08-23 23:11:10,673 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-08-23 23:11:10,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1572 conditions, 594 events. 359/594 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2286 event pairs, 99 based on Foata normal form. 8/602 useless extension candidates. Maximal degree in co-relation 1560. Up to 339 conditions per place. [2023-08-23 23:11:10,677 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 24 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-08-23 23:11:10,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 164 flow [2023-08-23 23:11:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:11:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:11:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 305 transitions. [2023-08-23 23:11:10,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407801418439716 [2023-08-23 23:11:10,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 305 transitions. [2023-08-23 23:11:10,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 305 transitions. [2023-08-23 23:11:10,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:10,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 305 transitions. [2023-08-23 23:11:10,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 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) [2023-08-23 23:11:10,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:10,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:10,685 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 76 flow. Second operand 4 states and 305 transitions. [2023-08-23 23:11:10,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 164 flow [2023-08-23 23:11:10,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 23:11:10,687 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 104 flow [2023-08-23 23:11:10,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-23 23:11:10,688 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-23 23:11:10,688 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 104 flow [2023-08-23 23:11:10,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-23 23:11:10,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:10,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:10,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 23:11:10,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:10,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:10,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1803090937, now seen corresponding path program 1 times [2023-08-23 23:11:10,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:10,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102437121] [2023-08-23 23:11:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:10,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:10,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102437121] [2023-08-23 23:11:10,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102437121] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:10,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:10,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:11:10,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050845057] [2023-08-23 23:11:10,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:10,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:11:10,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:11:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:11:10,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 141 [2023-08-23 23:11:10,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-23 23:11:10,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:10,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 141 [2023-08-23 23:11:10,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:10,883 INFO L124 PetriNetUnfolderBase]: 336/559 cut-off events. [2023-08-23 23:11:10,884 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-08-23 23:11:10,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 559 events. 336/559 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2191 event pairs, 73 based on Foata normal form. 6/565 useless extension candidates. Maximal degree in co-relation 1584. Up to 360 conditions per place. [2023-08-23 23:11:10,887 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 29 selfloop transitions, 11 changer transitions 0/40 dead transitions. [2023-08-23 23:11:10,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 246 flow [2023-08-23 23:11:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:11:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:11:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 313 transitions. [2023-08-23 23:11:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5549645390070922 [2023-08-23 23:11:10,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 313 transitions. [2023-08-23 23:11:10,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 313 transitions. [2023-08-23 23:11:10,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:10,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 313 transitions. [2023-08-23 23:11:10,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 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) [2023-08-23 23:11:10,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:10,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:10,893 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 104 flow. Second operand 4 states and 313 transitions. [2023-08-23 23:11:10,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 246 flow [2023-08-23 23:11:10,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:11:10,896 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 167 flow [2023-08-23 23:11:10,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=167, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-08-23 23:11:10,897 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-08-23 23:11:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 167 flow [2023-08-23 23:11:10,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 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) [2023-08-23 23:11:10,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:10,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:10,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 23:11:10,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:10,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash -61224390, now seen corresponding path program 1 times [2023-08-23 23:11:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453526092] [2023-08-23 23:11:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:10,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:10,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453526092] [2023-08-23 23:11:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453526092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:10,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:10,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:11:10,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275846801] [2023-08-23 23:11:10,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:10,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-23 23:11:10,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:10,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-23 23:11:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-23 23:11:10,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-23 23:11:10,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-08-23 23:11:10,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:10,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-23 23:11:10,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:11,074 INFO L124 PetriNetUnfolderBase]: 185/345 cut-off events. [2023-08-23 23:11:11,074 INFO L125 PetriNetUnfolderBase]: For 491/516 co-relation queries the response was YES. [2023-08-23 23:11:11,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1100 conditions, 345 events. 185/345 cut-off events. For 491/516 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1454 event pairs, 50 based on Foata normal form. 21/354 useless extension candidates. Maximal degree in co-relation 1082. Up to 271 conditions per place. [2023-08-23 23:11:11,077 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 30 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-23 23:11:11,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 305 flow [2023-08-23 23:11:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-23 23:11:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-23 23:11:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-08-23 23:11:11,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697399527186762 [2023-08-23 23:11:11,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-08-23 23:11:11,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-08-23 23:11:11,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:11,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-08-23 23:11:11,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-08-23 23:11:11,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-23 23:11:11,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-23 23:11:11,082 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 167 flow. Second operand 3 states and 241 transitions. [2023-08-23 23:11:11,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 305 flow [2023-08-23 23:11:11,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 303 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-23 23:11:11,086 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 191 flow [2023-08-23 23:11:11,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-23 23:11:11,088 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-23 23:11:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 191 flow [2023-08-23 23:11:11,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2023-08-23 23:11:11,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:11,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 23:11:11,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:11,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:11,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1120047546, now seen corresponding path program 1 times [2023-08-23 23:11:11,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:11,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791656096] [2023-08-23 23:11:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:11,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:11,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791656096] [2023-08-23 23:11:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791656096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:11,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:11:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065787383] [2023-08-23 23:11:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:11,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:11:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:11:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:11:11,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-23 23:11:11,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2023-08-23 23:11:11,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:11,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-23 23:11:11,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:11,290 INFO L124 PetriNetUnfolderBase]: 113/232 cut-off events. [2023-08-23 23:11:11,291 INFO L125 PetriNetUnfolderBase]: For 339/381 co-relation queries the response was YES. [2023-08-23 23:11:11,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 232 events. 113/232 cut-off events. For 339/381 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 892 event pairs, 19 based on Foata normal form. 43/270 useless extension candidates. Maximal degree in co-relation 868. Up to 103 conditions per place. [2023-08-23 23:11:11,293 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 37 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2023-08-23 23:11:11,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 397 flow [2023-08-23 23:11:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:11:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:11:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 321 transitions. [2023-08-23 23:11:11,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2023-08-23 23:11:11,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 321 transitions. [2023-08-23 23:11:11,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 321 transitions. [2023-08-23 23:11:11,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:11,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 321 transitions. [2023-08-23 23:11:11,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:11:11,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,298 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 191 flow. Second operand 4 states and 321 transitions. [2023-08-23 23:11:11,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 397 flow [2023-08-23 23:11:11,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-23 23:11:11,302 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 227 flow [2023-08-23 23:11:11,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=227, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-08-23 23:11:11,304 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 15 predicate places. [2023-08-23 23:11:11,304 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 227 flow [2023-08-23 23:11:11,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2023-08-23 23:11:11,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:11,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:11,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 23:11:11,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:11,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1625474379, now seen corresponding path program 1 times [2023-08-23 23:11:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272963695] [2023-08-23 23:11:11,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:11,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:11,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272963695] [2023-08-23 23:11:11,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272963695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:11,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:11,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 23:11:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768972878] [2023-08-23 23:11:11,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:11,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 23:11:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:11,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 23:11:11,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-23 23:11:11,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-23 23:11:11,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 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) [2023-08-23 23:11:11,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:11,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-23 23:11:11,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:11,511 INFO L124 PetriNetUnfolderBase]: 94/191 cut-off events. [2023-08-23 23:11:11,511 INFO L125 PetriNetUnfolderBase]: For 471/538 co-relation queries the response was YES. [2023-08-23 23:11:11,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 191 events. 94/191 cut-off events. For 471/538 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 706 event pairs, 15 based on Foata normal form. 50/237 useless extension candidates. Maximal degree in co-relation 795. Up to 79 conditions per place. [2023-08-23 23:11:11,513 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 32 selfloop transitions, 10 changer transitions 2/50 dead transitions. [2023-08-23 23:11:11,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 421 flow [2023-08-23 23:11:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-23 23:11:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-23 23:11:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2023-08-23 23:11:11,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574468085106383 [2023-08-23 23:11:11,515 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 393 transitions. [2023-08-23 23:11:11,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 393 transitions. [2023-08-23 23:11:11,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:11,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 393 transitions. [2023-08-23 23:11:11,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 78.6) internal successors, (393), 5 states have internal predecessors, (393), 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) [2023-08-23 23:11:11,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 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) [2023-08-23 23:11:11,518 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 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) [2023-08-23 23:11:11,518 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 227 flow. Second operand 5 states and 393 transitions. [2023-08-23 23:11:11,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 421 flow [2023-08-23 23:11:11,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 395 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-23 23:11:11,521 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 233 flow [2023-08-23 23:11:11,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-23 23:11:11,522 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-23 23:11:11,522 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 233 flow [2023-08-23 23:11:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 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) [2023-08-23 23:11:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:11,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-23 23:11:11,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:11,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash -37915969, now seen corresponding path program 1 times [2023-08-23 23:11:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931133575] [2023-08-23 23:11:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931133575] [2023-08-23 23:11:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931133575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:11,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 23:11:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676193480] [2023-08-23 23:11:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:11:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:11:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:11:11,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 141 [2023-08-23 23:11:11,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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) [2023-08-23 23:11:11,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:11,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 141 [2023-08-23 23:11:11,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:11,696 INFO L124 PetriNetUnfolderBase]: 121/260 cut-off events. [2023-08-23 23:11:11,696 INFO L125 PetriNetUnfolderBase]: For 815/818 co-relation queries the response was YES. [2023-08-23 23:11:11,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 260 events. 121/260 cut-off events. For 815/818 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1067 event pairs, 15 based on Foata normal form. 4/264 useless extension candidates. Maximal degree in co-relation 1127. Up to 147 conditions per place. [2023-08-23 23:11:11,698 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 21 selfloop transitions, 1 changer transitions 35/58 dead transitions. [2023-08-23 23:11:11,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 519 flow [2023-08-23 23:11:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:11:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:11:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2023-08-23 23:11:11,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2023-08-23 23:11:11,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 318 transitions. [2023-08-23 23:11:11,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 318 transitions. [2023-08-23 23:11:11,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:11,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 318 transitions. [2023-08-23 23:11:11,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 23:11:11,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,702 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 233 flow. Second operand 4 states and 318 transitions. [2023-08-23 23:11:11,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 519 flow [2023-08-23 23:11:11,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 463 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-23 23:11:11,706 INFO L231 Difference]: Finished difference. Result has 45 places, 22 transitions, 131 flow [2023-08-23 23:11:11,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2023-08-23 23:11:11,707 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-08-23 23:11:11,707 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 131 flow [2023-08-23 23:11:11,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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) [2023-08-23 23:11:11,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 23:11:11,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-23 23:11:11,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-23 23:11:11,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 23:11:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1647269657, now seen corresponding path program 2 times [2023-08-23 23:11:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 23:11:11,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167966888] [2023-08-23 23:11:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 23:11:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 23:11:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 23:11:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 23:11:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 23:11:11,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167966888] [2023-08-23 23:11:11,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167966888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 23:11:11,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 23:11:11,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 23:11:11,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501054625] [2023-08-23 23:11:11,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 23:11:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 23:11:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 23:11:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 23:11:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 23:11:11,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 141 [2023-08-23 23:11:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 22 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2023-08-23 23:11:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 23:11:11,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 141 [2023-08-23 23:11:11,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 23:11:11,834 INFO L124 PetriNetUnfolderBase]: 18/54 cut-off events. [2023-08-23 23:11:11,835 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-23 23:11:11,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 54 events. 18/54 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 104 event pairs, 9 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 228. Up to 31 conditions per place. [2023-08-23 23:11:11,835 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-23 23:11:11,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 22 transitions, 173 flow [2023-08-23 23:11:11,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 23:11:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 23:11:11,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2023-08-23 23:11:11,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2023-08-23 23:11:11,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 300 transitions. [2023-08-23 23:11:11,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 300 transitions. [2023-08-23 23:11:11,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 23:11:11,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 300 transitions. [2023-08-23 23:11:11,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-08-23 23:11:11,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 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) [2023-08-23 23:11:11,841 INFO L175 Difference]: Start difference. First operand has 45 places, 22 transitions, 131 flow. Second operand 4 states and 300 transitions. [2023-08-23 23:11:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 22 transitions, 173 flow [2023-08-23 23:11:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 22 transitions, 144 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-23 23:11:11,843 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-23 23:11:11,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-23 23:11:11,845 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2023-08-23 23:11:11,845 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-23 23:11:11,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2023-08-23 23:11:11,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-23 23:11:11,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-23 23:11:11,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-23 23:11:11,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-23 23:11:11,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-23 23:11:11,849 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-08-23 23:11:11,853 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 23:11:11,853 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 23:11:11,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 11:11:11 BasicIcfg [2023-08-23 23:11:11,862 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 23:11:11,862 INFO L158 Benchmark]: Toolchain (without parser) took 5461.63ms. Allocated memory was 354.4MB in the beginning and 425.7MB in the end (delta: 71.3MB). Free memory was 328.6MB in the beginning and 218.8MB in the end (delta: 109.8MB). Peak memory consumption was 182.1MB. Max. memory is 16.0GB. [2023-08-23 23:11:11,862 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 331.6MB in the beginning and 331.5MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 23:11:11,863 INFO L158 Benchmark]: CACSL2BoogieTranslator took 487.64ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 307.8MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-23 23:11:11,863 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.76ms. Allocated memory is still 354.4MB. Free memory was 307.8MB in the beginning and 306.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 23:11:11,863 INFO L158 Benchmark]: Boogie Preprocessor took 33.52ms. Allocated memory is still 354.4MB. Free memory was 305.7MB in the beginning and 304.9MB in the end (delta: 880.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 23:11:11,864 INFO L158 Benchmark]: RCFGBuilder took 443.08ms. Allocated memory is still 354.4MB. Free memory was 304.9MB in the beginning and 290.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-23 23:11:11,864 INFO L158 Benchmark]: TraceAbstraction took 4431.05ms. Allocated memory was 354.4MB in the beginning and 425.7MB in the end (delta: 71.3MB). Free memory was 289.8MB in the beginning and 218.8MB in the end (delta: 71.0MB). Peak memory consumption was 144.4MB. Max. memory is 16.0GB. [2023-08-23 23:11:11,865 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 354.4MB. Free memory was 331.6MB in the beginning and 331.5MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 487.64ms. Allocated memory is still 354.4MB. Free memory was 328.6MB in the beginning and 307.8MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.76ms. Allocated memory is still 354.4MB. Free memory was 307.8MB in the beginning and 306.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 33.52ms. Allocated memory is still 354.4MB. Free memory was 305.7MB in the beginning and 304.9MB in the end (delta: 880.3kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 443.08ms. Allocated memory is still 354.4MB. Free memory was 304.9MB in the beginning and 290.2MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4431.05ms. Allocated memory was 354.4MB in the beginning and 425.7MB in the end (delta: 71.3MB). Free memory was 289.8MB in the beginning and 218.8MB in the end (delta: 71.0MB). Peak memory consumption was 144.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 77 PlacesBefore, 26 PlacesAfterwards, 68 TransitionsBefore, 17 TransitionsAfterwards, 974 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 1736 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1002, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 545, independent: 521, independent conditional: 0, independent unconditional: 521, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1002, independent: 412, independent conditional: 0, independent unconditional: 412, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 545, unknown conditional: 0, unknown unconditional: 545] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 105 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 76 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 283 IncrementalHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 10 mSDtfsCounter, 283 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=6, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-23 23:11:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...