/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/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-23 22:41:34,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-23 22:41:34,309 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 22:41:34,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-23 22:41:34,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-23 22:41:34,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-23 22:41:34,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-23 22:41:34,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-23 22:41:34,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-23 22:41:34,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-23 22:41:34,350 INFO L153 SettingsManager]: * Use SBE=true [2023-08-23 22:41:34,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-23 22:41:34,350 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-23 22:41:34,351 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-23 22:41:34,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-23 22:41:34,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-23 22:41:34,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-23 22:41:34,352 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-23 22:41:34,352 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-23 22:41:34,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-23 22:41:34,353 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-23 22:41:34,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-23 22:41:34,353 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-23 22:41:34,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-23 22:41:34,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-23 22:41:34,354 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-23 22:41:34,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-23 22:41:34,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:34,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-23 22:41:34,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-23 22:41:34,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-23 22:41:34,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-23 22:41:34,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-23 22:41:34,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-23 22:41:34,356 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-23 22:41:34,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-23 22:41:34,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-23 22:41:34,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-23 22:41:34,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-23 22:41:34,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-23 22:41:34,712 INFO L274 PluginConnector]: CDTParser initialized [2023-08-23 22:41:34,713 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2023-08-23 22:41:35,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-23 22:41:36,101 INFO L384 CDTParser]: Found 1 translation units. [2023-08-23 22:41:36,101 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2023-08-23 22:41:36,123 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e2fe7f/c8a350164902416691d7cf72969cb029/FLAG3396688a9 [2023-08-23 22:41:36,136 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e82e2fe7f/c8a350164902416691d7cf72969cb029 [2023-08-23 22:41:36,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-23 22:41:36,139 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-23 22:41:36,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:36,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-23 22:41:36,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-23 22:41:36,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e8dcc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36, skipping insertion in model container [2023-08-23 22:41:36,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,193 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-23 22:41:36,519 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/triangular-2.i[30952,30965] [2023-08-23 22:41:36,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:36,528 INFO L201 MainTranslator]: Completed pre-run [2023-08-23 22:41:36,555 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:36,557 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-23 22:41:36,576 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/triangular-2.i[30952,30965] [2023-08-23 22:41:36,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-23 22:41:36,613 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:36,613 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-23 22:41:36,620 INFO L206 MainTranslator]: Completed translation [2023-08-23 22:41:36,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36 WrapperNode [2023-08-23 22:41:36,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-23 22:41:36,621 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:36,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-23 22:41:36,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-23 22:41:36,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,657 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,676 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-23 22:41:36,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-23 22:41:36,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-23 22:41:36,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-23 22:41:36,678 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-23 22:41:36,685 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,691 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,706 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,708 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,710 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-23 22:41:36,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-23 22:41:36,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-23 22:41:36,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-23 22:41:36,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (1/1) ... [2023-08-23 22:41:36,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-23 22:41:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:36,748 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 22:41:36,769 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 22:41:36,782 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-23 22:41:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-23 22:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-23 22:41:36,783 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-23 22:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-23 22:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-23 22:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-23 22:41:36,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-23 22:41:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-23 22:41:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-23 22:41:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-23 22:41:36,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-23 22:41:36,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-23 22:41:36,786 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 22:41:36,936 INFO L236 CfgBuilder]: Building ICFG [2023-08-23 22:41:36,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-23 22:41:37,103 INFO L277 CfgBuilder]: Performing block encoding [2023-08-23 22:41:37,108 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-23 22:41:37,109 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-23 22:41:37,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:37 BoogieIcfgContainer [2023-08-23 22:41:37,111 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-23 22:41:37,112 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-23 22:41:37,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-23 22:41:37,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-23 22:41:37,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.08 10:41:36" (1/3) ... [2023-08-23 22:41:37,116 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2316870e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:37, skipping insertion in model container [2023-08-23 22:41:37,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.08 10:41:36" (2/3) ... [2023-08-23 22:41:37,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2316870e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.08 10:41:37, skipping insertion in model container [2023-08-23 22:41:37,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.08 10:41:37" (3/3) ... [2023-08-23 22:41:37,118 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2023-08-23 22:41:37,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-23 22:41:37,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-23 22:41:37,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-23 22:41:37,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-23 22:41:37,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:37,302 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:37,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:37,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:37,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2023-08-23 22:41:37,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:37,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-23 22:41:37,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:37,332 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:37,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 138 flow [2023-08-23 22:41:37,359 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-23 22:41:37,359 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:37,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 66 events. 5/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-23 22:41:37,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 1200 [2023-08-23 22:41:39,252 INFO L134 LiptonReduction]: Checked pairs total: 1095 [2023-08-23 22:41:39,253 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-23 22:41:39,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-23 22:41:39,273 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;@f524615, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-23 22:41:39,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-23 22:41:39,277 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-23 22:41:39,277 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-23 22:41:39,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-23 22:41:39,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:39,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-23 22:41:39,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:39,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:39,283 INFO L85 PathProgramCache]: Analyzing trace with hash -541533417, now seen corresponding path program 1 times [2023-08-23 22:41:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:39,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248241117] [2023-08-23 22:41:39,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:39,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:39,595 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 22:41:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:39,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248241117] [2023-08-23 22:41:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248241117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:39,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:39,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-23 22:41:39,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169686419] [2023-08-23 22:41:39,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:39,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-23 22:41:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:39,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-23 22:41:39,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-23 22:41:39,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:39,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 22:41:39,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:39,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:39,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:39,722 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-08-23 22:41:39,722 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-23 22:41:39,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-08-23 22:41:39,726 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-23 22:41:39,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-23 22:41:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-23 22:41:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-23 22:41:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-23 22:41:39,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470703125 [2023-08-23 22:41:39,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-23 22:41:39,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-23 22:41:39,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:39,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-23 22:41:39,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 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 22:41:39,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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 22:41:39,775 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 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 22:41:39,777 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 241 transitions. [2023-08-23 22:41:39,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-23 22:41:39,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-23 22:41:39,781 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-23 22:41:39,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-23 22:41:39,785 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-23 22:41:39,785 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-23 22:41:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 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 22:41:39,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:39,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-23 22:41:39,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:39,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -722991115, now seen corresponding path program 1 times [2023-08-23 22:41:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593530479] [2023-08-23 22:41:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:39,925 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 22:41:39,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:39,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593530479] [2023-08-23 22:41:39,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593530479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:39,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:39,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:39,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612597852] [2023-08-23 22:41:39,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:39,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:41:39,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:39,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:41:39,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:41:39,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:39,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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 22:41:39,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:39,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:39,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:40,024 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-23 22:41:40,024 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-23 22:41:40,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 658 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-08-23 22:41:40,026 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-23 22:41:40,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-23 22:41:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-23 22:41:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-23 22:41:40,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-23 22:41:40,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-23 22:41:40,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-23 22:41:40,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-23 22:41:40,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:40,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-23 22:41:40,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 59.333333333333336) internal successors, (356), 6 states have internal predecessors, (356), 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 22:41:40,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 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 22:41:40,033 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 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 22:41:40,033 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-23 22:41:40,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-23 22:41:40,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:40,035 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-23 22:41:40,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-23 22:41:40,036 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-23 22:41:40,036 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-23 22:41:40,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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 22:41:40,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:40,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:40,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-23 22:41:40,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:40,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:40,038 INFO L85 PathProgramCache]: Analyzing trace with hash -722976235, now seen corresponding path program 2 times [2023-08-23 22:41:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:40,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696404428] [2023-08-23 22:41:40,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:40,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:40,135 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 22:41:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:40,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696404428] [2023-08-23 22:41:40,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696404428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:40,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:40,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-23 22:41:40,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682966868] [2023-08-23 22:41:40,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:40,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-23 22:41:40,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:40,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-23 22:41:40,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-23 22:41:40,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:40,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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 22:41:40,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:40,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:40,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:40,245 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-23 22:41:40,245 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-23 22:41:40,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 681 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-08-23 22:41:40,247 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-08-23 22:41:40,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-08-23 22:41:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:41:40,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:41:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-08-23 22:41:40,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2023-08-23 22:41:40,249 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-08-23 22:41:40,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-08-23 22:41:40,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:40,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-08-23 22:41:40,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 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 22:41:40,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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 22:41:40,253 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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 22:41:40,254 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-08-23 22:41:40,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-08-23 22:41:40,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-23 22:41:40,257 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-08-23 22:41:40,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-23 22:41:40,258 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-08-23 22:41:40,258 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-08-23 22:41:40,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 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 22:41:40,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:40,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:40,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-23 22:41:40,259 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:40,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1288779972, now seen corresponding path program 1 times [2023-08-23 22:41:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447622693] [2023-08-23 22:41:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:40,366 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 22:41:40,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:40,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447622693] [2023-08-23 22:41:40,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447622693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:40,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:40,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:41:40,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644123548] [2023-08-23 22:41:40,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:40,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:41:40,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:41:40,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:41:40,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:40,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:40,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:40,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:40,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:40,458 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-23 22:41:40,459 INFO L125 PetriNetUnfolderBase]: For 777/777 co-relation queries the response was YES. [2023-08-23 22:41:40,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 942 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-08-23 22:41:40,461 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-08-23 22:41:40,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-08-23 22:41:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-23 22:41:40,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-23 22:41:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-23 22:41:40,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458984375 [2023-08-23 22:41:40,463 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-23 22:41:40,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-23 22:41:40,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:40,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-23 22:41:40,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:40,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 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 22:41:40,467 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 128.0) internal successors, (1152), 9 states have internal predecessors, (1152), 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 22:41:40,467 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-08-23 22:41:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-08-23 22:41:40,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-23 22:41:40,473 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-08-23 22:41:40,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-08-23 22:41:40,474 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-08-23 22:41:40,474 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-08-23 22:41:40,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:40,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:40,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:40,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-23 22:41:40,475 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:40,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:40,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1319181672, now seen corresponding path program 2 times [2023-08-23 22:41:40,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:40,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951056668] [2023-08-23 22:41:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:40,573 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 22:41:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:40,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951056668] [2023-08-23 22:41:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951056668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-23 22:41:40,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-23 22:41:40,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-23 22:41:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521805099] [2023-08-23 22:41:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-23 22:41:40,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-23 22:41:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-23 22:41:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-23 22:41:40,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:40,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:40,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:40,699 INFO L124 PetriNetUnfolderBase]: 154/271 cut-off events. [2023-08-23 22:41:40,699 INFO L125 PetriNetUnfolderBase]: For 1323/1323 co-relation queries the response was YES. [2023-08-23 22:41:40,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 923 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-08-23 22:41:40,704 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-08-23 22:41:40,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-08-23 22:41:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-23 22:41:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-23 22:41:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-08-23 22:41:40,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-08-23 22:41:40,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-08-23 22:41:40,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-08-23 22:41:40,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:40,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-08-23 22:41:40,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 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 22:41:40,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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 22:41:40,709 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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 22:41:40,709 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-08-23 22:41:40,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-08-23 22:41:40,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:40,717 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-08-23 22:41:40,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-23 22:41:40,719 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-08-23 22:41:40,720 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-08-23 22:41:40,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-23 22:41:40,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:40,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:40,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-23 22:41:40,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:40,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:40,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2055022021, now seen corresponding path program 3 times [2023-08-23 22:41:40,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:40,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515930168] [2023-08-23 22:41:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:40,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515930168] [2023-08-23 22:41:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515930168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871015810] [2023-08-23 22:41:40,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:41:40,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:40,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:40,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:40,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-23 22:41:40,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-23 22:41:40,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:40,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-23 22:41:40,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:41,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871015810] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:41,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:41,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-23 22:41:41,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525207829] [2023-08-23 22:41:41,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-23 22:41:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-23 22:41:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-23 22:41:41,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:41,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 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 22:41:41,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:41,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:41,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:41,408 INFO L124 PetriNetUnfolderBase]: 202/351 cut-off events. [2023-08-23 22:41:41,408 INFO L125 PetriNetUnfolderBase]: For 2187/2187 co-relation queries the response was YES. [2023-08-23 22:41:41,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2187/2187 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1213 event pairs, 10 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-08-23 22:41:41,411 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 36 selfloop transitions, 38 changer transitions 26/100 dead transitions. [2023-08-23 22:41:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 992 flow [2023-08-23 22:41:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 22:41:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 22:41:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 935 transitions. [2023-08-23 22:41:41,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45654296875 [2023-08-23 22:41:41,414 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 935 transitions. [2023-08-23 22:41:41,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 935 transitions. [2023-08-23 22:41:41,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:41,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 935 transitions. [2023-08-23 22:41:41,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.4375) internal successors, (935), 16 states have internal predecessors, (935), 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 22:41:41,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 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 22:41:41,420 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 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 22:41:41,420 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 16 states and 935 transitions. [2023-08-23 22:41:41,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 992 flow [2023-08-23 22:41:41,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 100 transitions, 927 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-23 22:41:41,428 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 705 flow [2023-08-23 22:41:41,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=705, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-08-23 22:41:41,429 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 49 predicate places. [2023-08-23 22:41:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 705 flow [2023-08-23 22:41:41,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.916666666666664) internal successors, (659), 12 states have internal predecessors, (659), 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 22:41:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:41,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:41,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-23 22:41:41,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:41,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash -728579416, now seen corresponding path program 4 times [2023-08-23 22:41:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:41,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154771007] [2023-08-23 22:41:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:41,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:41,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154771007] [2023-08-23 22:41:41,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154771007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:41,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47167003] [2023-08-23 22:41:41,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-23 22:41:41,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:41,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:41,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:41,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-23 22:41:41,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-23 22:41:41,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:41,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:41:41,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:41,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:42,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47167003] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:42,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:42,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:41:42,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190267735] [2023-08-23 22:41:42,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:42,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:41:42,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:42,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:41:42,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:41:42,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:42,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 705 flow. Second operand has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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 22:41:42,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:42,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:42,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:42,318 INFO L124 PetriNetUnfolderBase]: 258/463 cut-off events. [2023-08-23 22:41:42,319 INFO L125 PetriNetUnfolderBase]: For 4314/4314 co-relation queries the response was YES. [2023-08-23 22:41:42,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 463 events. 258/463 cut-off events. For 4314/4314 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1669 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2419. Up to 237 conditions per place. [2023-08-23 22:41:42,323 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-08-23 22:41:42,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 1473 flow [2023-08-23 22:41:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-23 22:41:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-23 22:41:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-08-23 22:41:42,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45458984375 [2023-08-23 22:41:42,327 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-08-23 22:41:42,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-08-23 22:41:42,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:42,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-08-23 22:41:42,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.1875) internal successors, (931), 16 states have internal predecessors, (931), 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 22:41:42,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 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 22:41:42,333 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 128.0) internal successors, (2176), 17 states have internal predecessors, (2176), 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 22:41:42,333 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 705 flow. Second operand 16 states and 931 transitions. [2023-08-23 22:41:42,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 1473 flow [2023-08-23 22:41:42,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1098 flow, removed 170 selfloop flow, removed 7 redundant places. [2023-08-23 22:41:42,348 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 769 flow [2023-08-23 22:41:42,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=769, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-08-23 22:41:42,348 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-08-23 22:41:42,349 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 769 flow [2023-08-23 22:41:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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 22:41:42,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:42,349 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:42,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:42,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-23 22:41:42,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:42,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash 71425160, now seen corresponding path program 5 times [2023-08-23 22:41:42,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:42,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081190584] [2023-08-23 22:41:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:42,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081190584] [2023-08-23 22:41:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081190584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201935208] [2023-08-23 22:41:42,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-23 22:41:42,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:42,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:42,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:42,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-23 22:41:42,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-23 22:41:42,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:42,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:41:42,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:42,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:42,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201935208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:42,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:42,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-23 22:41:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865700143] [2023-08-23 22:41:42,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:42,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-23 22:41:42,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:42,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-23 22:41:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-23 22:41:42,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:42,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 769 flow. Second operand has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 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 22:41:42,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:42,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:42,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:43,450 INFO L124 PetriNetUnfolderBase]: 412/755 cut-off events. [2023-08-23 22:41:43,451 INFO L125 PetriNetUnfolderBase]: For 12083/12083 co-relation queries the response was YES. [2023-08-23 22:41:43,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 755 events. 412/755 cut-off events. For 12083/12083 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3334 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3958. Up to 227 conditions per place. [2023-08-23 22:41:43,457 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-08-23 22:41:43,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2087 flow [2023-08-23 22:41:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-23 22:41:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-23 22:41:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-08-23 22:41:43,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-23 22:41:43,461 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-08-23 22:41:43,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-08-23 22:41:43,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:43,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-08-23 22:41:43,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 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 22:41:43,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 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 22:41:43,468 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 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 22:41:43,468 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 769 flow. Second operand 22 states and 1280 transitions. [2023-08-23 22:41:43,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2087 flow [2023-08-23 22:41:43,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1966 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:43,494 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1476 flow [2023-08-23 22:41:43,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1476, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-23 22:41:43,494 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-08-23 22:41:43,495 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1476 flow [2023-08-23 22:41:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.8235294117647) internal successors, (932), 17 states have internal predecessors, (932), 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 22:41:43,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:43,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:43,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-23 22:41:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:43,701 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:43,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash 527212936, now seen corresponding path program 6 times [2023-08-23 22:41:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889800906] [2023-08-23 22:41:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:43,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889800906] [2023-08-23 22:41:43,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889800906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:43,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931568060] [2023-08-23 22:41:43,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-23 22:41:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:43,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:43,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:43,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-23 22:41:43,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-23 22:41:43,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:43,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-23 22:41:43,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:43,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931568060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:44,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-23 22:41:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619026391] [2023-08-23 22:41:44,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-23 22:41:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-23 22:41:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-23 22:41:44,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:44,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1476 flow. Second operand has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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 22:41:44,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:44,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:44,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:44,556 INFO L124 PetriNetUnfolderBase]: 612/1111 cut-off events. [2023-08-23 22:41:44,557 INFO L125 PetriNetUnfolderBase]: For 37886/37886 co-relation queries the response was YES. [2023-08-23 22:41:44,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7810 conditions, 1111 events. 612/1111 cut-off events. For 37886/37886 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5377 event pairs, 31 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7754. Up to 355 conditions per place. [2023-08-23 22:41:44,567 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-08-23 22:41:44,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3750 flow [2023-08-23 22:41:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:41:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:41:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-08-23 22:41:44,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45457175925925924 [2023-08-23 22:41:44,572 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-08-23 22:41:44,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-08-23 22:41:44,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:44,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-08-23 22:41:44,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.18518518518518) internal successors, (1571), 27 states have internal predecessors, (1571), 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 22:41:44,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 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 22:41:44,581 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 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 22:41:44,581 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1476 flow. Second operand 27 states and 1571 transitions. [2023-08-23 22:41:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3750 flow [2023-08-23 22:41:44,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3445 flow, removed 144 selfloop flow, removed 4 redundant places. [2023-08-23 22:41:44,648 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2639 flow [2023-08-23 22:41:44,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2639, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-08-23 22:41:44,649 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-08-23 22:41:44,649 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2639 flow [2023-08-23 22:41:44,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.75) internal successors, (876), 16 states have internal predecessors, (876), 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 22:41:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:44,650 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:44,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:44,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:44,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:44,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1394490875, now seen corresponding path program 7 times [2023-08-23 22:41:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:44,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721185095] [2023-08-23 22:41:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:44,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:44,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721185095] [2023-08-23 22:41:44,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721185095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:44,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211450993] [2023-08-23 22:41:44,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-23 22:41:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:44,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:44,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:45,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-23 22:41:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:45,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-23 22:41:45,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:45,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-23 22:41:45,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211450993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:45,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:45,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-23 22:41:45,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838828068] [2023-08-23 22:41:45,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-23 22:41:45,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-23 22:41:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-23 22:41:45,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2639 flow. Second operand has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 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 22:41:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:45,836 INFO L124 PetriNetUnfolderBase]: 716/1307 cut-off events. [2023-08-23 22:41:45,836 INFO L125 PetriNetUnfolderBase]: For 72988/72988 co-relation queries the response was YES. [2023-08-23 22:41:45,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11789 conditions, 1307 events. 716/1307 cut-off events. For 72988/72988 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6601 event pairs, 46 based on Foata normal form. 20/1327 useless extension candidates. Maximal degree in co-relation 11718. Up to 430 conditions per place. [2023-08-23 22:41:45,853 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 71 selfloop transitions, 145 changer transitions 38/254 dead transitions. [2023-08-23 22:41:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 254 transitions, 5001 flow [2023-08-23 22:41:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-23 22:41:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-23 22:41:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-08-23 22:41:45,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-23 22:41:45,856 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-08-23 22:41:45,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-08-23 22:41:45,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:45,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-08-23 22:41:45,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.18181818181818) internal successors, (1280), 22 states have internal predecessors, (1280), 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 22:41:45,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 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 22:41:45,863 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 128.0) internal successors, (2944), 23 states have internal predecessors, (2944), 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 22:41:45,863 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2639 flow. Second operand 22 states and 1280 transitions. [2023-08-23 22:41:45,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 254 transitions, 5001 flow [2023-08-23 22:41:46,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 254 transitions, 3818 flow, removed 562 selfloop flow, removed 11 redundant places. [2023-08-23 22:41:46,025 INFO L231 Difference]: Finished difference. Result has 171 places, 188 transitions, 3035 flow [2023-08-23 22:41:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3035, PETRI_PLACES=171, PETRI_TRANSITIONS=188} [2023-08-23 22:41:46,026 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 153 predicate places. [2023-08-23 22:41:46,026 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 188 transitions, 3035 flow [2023-08-23 22:41:46,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.72222222222222) internal successors, (985), 18 states have internal predecessors, (985), 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 22:41:46,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:46,027 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:46,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:46,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-23 22:41:46,232 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:46,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash -779348309, now seen corresponding path program 8 times [2023-08-23 22:41:46,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:46,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217048416] [2023-08-23 22:41:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:46,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217048416] [2023-08-23 22:41:46,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217048416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494005919] [2023-08-23 22:41:46,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-23 22:41:46,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:46,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:46,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:46,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-23 22:41:46,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-23 22:41:46,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:46,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-23 22:41:46,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:46,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494005919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:46,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:46,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-08-23 22:41:46,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294292409] [2023-08-23 22:41:46,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:46,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-23 22:41:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:46,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-23 22:41:46,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-23 22:41:46,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:46,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 188 transitions, 3035 flow. Second operand has 15 states, 15 states have (on average 54.333333333333336) internal successors, (815), 15 states have internal predecessors, (815), 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 22:41:46,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:46,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:46,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:47,142 INFO L124 PetriNetUnfolderBase]: 732/1335 cut-off events. [2023-08-23 22:41:47,143 INFO L125 PetriNetUnfolderBase]: For 55413/55413 co-relation queries the response was YES. [2023-08-23 22:41:47,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11038 conditions, 1335 events. 732/1335 cut-off events. For 55413/55413 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6744 event pairs, 40 based on Foata normal form. 4/1339 useless extension candidates. Maximal degree in co-relation 10961. Up to 430 conditions per place. [2023-08-23 22:41:47,159 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 67 selfloop transitions, 149 changer transitions 34/250 dead transitions. [2023-08-23 22:41:47,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 250 transitions, 4449 flow [2023-08-23 22:41:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-23 22:41:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-23 22:41:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1158 transitions. [2023-08-23 22:41:47,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45234375 [2023-08-23 22:41:47,164 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1158 transitions. [2023-08-23 22:41:47,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1158 transitions. [2023-08-23 22:41:47,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:47,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1158 transitions. [2023-08-23 22:41:47,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.9) internal successors, (1158), 20 states have internal predecessors, (1158), 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 22:41:47,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 128.0) internal successors, (2688), 21 states have internal predecessors, (2688), 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 22:41:47,174 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 128.0) internal successors, (2688), 21 states have internal predecessors, (2688), 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 22:41:47,175 INFO L175 Difference]: Start difference. First operand has 171 places, 188 transitions, 3035 flow. Second operand 20 states and 1158 transitions. [2023-08-23 22:41:47,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 250 transitions, 4449 flow [2023-08-23 22:41:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 250 transitions, 4181 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-23 22:41:47,331 INFO L231 Difference]: Finished difference. Result has 184 places, 192 transitions, 3207 flow [2023-08-23 22:41:47,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2767, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3207, PETRI_PLACES=184, PETRI_TRANSITIONS=192} [2023-08-23 22:41:47,332 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 166 predicate places. [2023-08-23 22:41:47,332 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 192 transitions, 3207 flow [2023-08-23 22:41:47,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.333333333333336) internal successors, (815), 15 states have internal predecessors, (815), 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 22:41:47,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:47,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:47,538 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:47,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:47,539 INFO L85 PathProgramCache]: Analyzing trace with hash -795483769, now seen corresponding path program 9 times [2023-08-23 22:41:47,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:47,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180225430] [2023-08-23 22:41:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-23 22:41:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-23 22:41:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180225430] [2023-08-23 22:41:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180225430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-23 22:41:47,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432575910] [2023-08-23 22:41:47,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-23 22:41:47,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:47,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-23 22:41:47,680 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-23 22:41:47,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-23 22:41:47,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-23 22:41:47,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-23 22:41:47,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-23 22:41:47,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-23 22:41:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:47,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-23 22:41:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-23 22:41:47,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432575910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-23 22:41:47,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-23 22:41:47,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-23 22:41:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742913683] [2023-08-23 22:41:47,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-23 22:41:47,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-23 22:41:47,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-23 22:41:47,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-23 22:41:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-08-23 22:41:47,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-23 22:41:47,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 192 transitions, 3207 flow. Second operand has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 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 22:41:47,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-23 22:41:47,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-23 22:41:47,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-23 22:41:48,684 INFO L124 PetriNetUnfolderBase]: 752/1371 cut-off events. [2023-08-23 22:41:48,684 INFO L125 PetriNetUnfolderBase]: For 65440/65440 co-relation queries the response was YES. [2023-08-23 22:41:48,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 1371 events. 752/1371 cut-off events. For 65440/65440 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6950 event pairs, 25 based on Foata normal form. 16/1387 useless extension candidates. Maximal degree in co-relation 11607. Up to 450 conditions per place. [2023-08-23 22:41:48,752 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 68 selfloop transitions, 172 changer transitions 48/288 dead transitions. [2023-08-23 22:41:48,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 288 transitions, 5213 flow [2023-08-23 22:41:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-23 22:41:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-23 22:41:48,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1567 transitions. [2023-08-23 22:41:48,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45341435185185186 [2023-08-23 22:41:48,755 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1567 transitions. [2023-08-23 22:41:48,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1567 transitions. [2023-08-23 22:41:48,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-23 22:41:48,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1567 transitions. [2023-08-23 22:41:48,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.03703703703704) internal successors, (1567), 27 states have internal predecessors, (1567), 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 22:41:48,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 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 22:41:48,765 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 128.0) internal successors, (3584), 28 states have internal predecessors, (3584), 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 22:41:48,765 INFO L175 Difference]: Start difference. First operand has 184 places, 192 transitions, 3207 flow. Second operand 27 states and 1567 transitions. [2023-08-23 22:41:48,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 288 transitions, 5213 flow [2023-08-23 22:41:48,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 288 transitions, 4847 flow, removed 46 selfloop flow, removed 17 redundant places. [2023-08-23 22:41:48,896 INFO L231 Difference]: Finished difference. Result has 199 places, 201 transitions, 3600 flow [2023-08-23 22:41:48,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3600, PETRI_PLACES=199, PETRI_TRANSITIONS=201} [2023-08-23 22:41:48,897 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 181 predicate places. [2023-08-23 22:41:48,897 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 201 transitions, 3600 flow [2023-08-23 22:41:48,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.44) internal successors, (1361), 25 states have internal predecessors, (1361), 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 22:41:48,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-23 22:41:48,897 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-23 22:41:48,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-23 22:41:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-23 22:41:49,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-23 22:41:49,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-23 22:41:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1089521068, now seen corresponding path program 10 times [2023-08-23 22:41:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-23 22:41:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731509504] [2023-08-23 22:41:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-23 22:41:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-23 22:41:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:41:49,114 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-23 22:41:49,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-23 22:41:49,137 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-23 22:41:49,137 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-23 22:41:49,138 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-23 22:41:49,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-23 22:41:49,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-23 22:41:49,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-23 22:41:49,140 INFO L445 BasicCegarLoop]: Path program histogram: [10, 2, 1] [2023-08-23 22:41:49,146 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-23 22:41:49,146 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-23 22:41:49,182 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.08 10:41:49 BasicIcfg [2023-08-23 22:41:49,182 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-23 22:41:49,183 INFO L158 Benchmark]: Toolchain (without parser) took 13043.54ms. Allocated memory was 379.6MB in the beginning and 549.5MB in the end (delta: 169.9MB). Free memory was 353.8MB in the beginning and 452.6MB in the end (delta: -98.7MB). Peak memory consumption was 72.6MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,183 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory was 357.6MB in the beginning and 357.5MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-23 22:41:49,183 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.28ms. Allocated memory is still 379.6MB. Free memory was 353.8MB in the beginning and 334.6MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,183 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.10ms. Allocated memory is still 379.6MB. Free memory was 334.6MB in the beginning and 332.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,184 INFO L158 Benchmark]: Boogie Preprocessor took 34.70ms. Allocated memory is still 379.6MB. Free memory was 332.5MB in the beginning and 331.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,184 INFO L158 Benchmark]: RCFGBuilder took 397.78ms. Allocated memory is still 379.6MB. Free memory was 331.0MB in the beginning and 317.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,184 INFO L158 Benchmark]: TraceAbstraction took 12070.22ms. Allocated memory was 379.6MB in the beginning and 549.5MB in the end (delta: 169.9MB). Free memory was 317.0MB in the beginning and 452.6MB in the end (delta: -135.6MB). Peak memory consumption was 34.9MB. Max. memory is 16.0GB. [2023-08-23 22:41:49,185 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory was 357.6MB in the beginning and 357.5MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 480.28ms. Allocated memory is still 379.6MB. Free memory was 353.8MB in the beginning and 334.6MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.10ms. Allocated memory is still 379.6MB. Free memory was 334.6MB in the beginning and 332.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.70ms. Allocated memory is still 379.6MB. Free memory was 332.5MB in the beginning and 331.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 397.78ms. Allocated memory is still 379.6MB. Free memory was 331.0MB in the beginning and 317.6MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 12070.22ms. Allocated memory was 379.6MB in the beginning and 549.5MB in the end (delta: 169.9MB). Free memory was 317.0MB in the beginning and 452.6MB in the end (delta: -135.6MB). Peak memory consumption was 34.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 68 PlacesBefore, 18 PlacesAfterwards, 66 TransitionsBefore, 14 TransitionsAfterwards, 1200 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 60 TotalNumberOfCompositions, 1095 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 977, independent: 951, independent conditional: 0, independent unconditional: 951, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 646, independent: 636, independent conditional: 0, independent unconditional: 636, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 977, independent: 315, independent conditional: 0, independent unconditional: 315, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 646, unknown conditional: 0, unknown unconditional: 646] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={3:0}, id2={5:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={3:0}, id2={5:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={3:0}, id2={5:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=15, id1={3:0}, id2={5:0}, j=16, k=5, k=5] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 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: 11.9s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1365 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1365 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 145 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1696 IncrementalHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 145 mSolverCounterUnsat, 0 mSDtfsCounter, 1696 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 395 GetRequests, 132 SyntacticMatches, 9 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3600occurred in iteration=12, InterpolantAutomatonStates: 182, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 322 ConstructedInterpolants, 0 QuantifiedInterpolants, 1316 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1000 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 12/189 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-23 22:41:49,198 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...