/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:13:37,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:13:37,513 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 [2023-08-24 11:13:37,518 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:13:37,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:13:37,550 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:13:37,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:13:37,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:13:37,556 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:13:37,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:13:37,560 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:13:37,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:13:37,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:13:37,561 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:13:37,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:13:37,562 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:13:37,563 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:13:37,563 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:13:37,564 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:13:37,564 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:13:37,564 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:13:37,565 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:13:37,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:13:37,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:13:37,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:13:37,566 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:13:37,566 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:13:37,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:13:37,567 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:13:37,567 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:13:37,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:13:37,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:13:37,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:13:37,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:13:37,899 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:13:37,901 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:13:37,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-24 11:13:39,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:13:39,370 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:13:39,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2023-08-24 11:13:39,384 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/569bb2324/8fd1873ebbe34f679feb54a85e19f615/FLAGa01aea1e5 [2023-08-24 11:13:39,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/569bb2324/8fd1873ebbe34f679feb54a85e19f615 [2023-08-24 11:13:39,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:13:39,408 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:13:39,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:13:39,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:13:39,411 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:13:39,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9d2fed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39, skipping insertion in model container [2023-08-24 11:13:39,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,451 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:13:39,767 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-longer-1.i[30961,30974] [2023-08-24 11:13:39,768 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:13:39,778 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:13:39,808 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-24 11:13:39,810 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-24 11:13:39,831 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-longer-1.i[30961,30974] [2023-08-24 11:13:39,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:13:39,867 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:13:39,867 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:13:39,873 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:13:39,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39 WrapperNode [2023-08-24 11:13:39,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:13:39,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:13:39,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:13:39,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:13:39,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,928 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-08-24 11:13:39,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:13:39,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:13:39,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:13:39,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:13:39,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,954 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,957 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,961 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:13:39,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:13:39,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:13:39,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:13:39,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (1/1) ... [2023-08-24 11:13:39,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:13:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:39,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 11:13:40,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 11:13:40,028 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-24 11:13:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-24 11:13:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-24 11:13:40,029 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-24 11:13:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:13:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:13:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:13:40,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:13:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:13:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:13:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:13:40,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:13:40,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:13:40,033 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:13:40,170 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:13:40,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:13:40,299 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:13:40,305 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:13:40,305 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 11:13:40,307 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:13:40 BoogieIcfgContainer [2023-08-24 11:13:40,307 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:13:40,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:13:40,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:13:40,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:13:40,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:13:39" (1/3) ... [2023-08-24 11:13:40,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2528b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:13:40, skipping insertion in model container [2023-08-24 11:13:40,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:13:39" (2/3) ... [2023-08-24 11:13:40,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a2528b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:13:40, skipping insertion in model container [2023-08-24 11:13:40,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:13:40" (3/3) ... [2023-08-24 11:13:40,314 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2023-08-24 11:13:40,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:13:40,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:13:40,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:13:40,374 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:13:40,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 68 transitions, 146 flow [2023-08-24 11:13:40,438 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-24 11:13:40,438 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:13:40,443 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. [2023-08-24 11:13:40,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 68 transitions, 146 flow [2023-08-24 11:13:40,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 138 flow [2023-08-24 11:13:40,450 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:13:40,459 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-24 11:13:40,462 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 138 flow [2023-08-24 11:13:40,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 138 flow [2023-08-24 11:13:40,493 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-24 11:13:40,493 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:13:40,494 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. [2023-08-24 11:13:40,495 INFO L119 LiptonReduction]: Number of co-enabled transitions 1200 [2023-08-24 11:13:42,317 INFO L134 LiptonReduction]: Checked pairs total: 1095 [2023-08-24 11:13:42,317 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-24 11:13:42,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:13:42,336 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;@18c5bdd2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:13:42,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 11:13:42,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:13:42,341 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-08-24 11:13:42,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:13:42,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:42,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-24 11:13:42,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:42,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:42,347 INFO L85 PathProgramCache]: Analyzing trace with hash -541533417, now seen corresponding path program 1 times [2023-08-24 11:13:42,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:42,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518387009] [2023-08-24 11:13:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:42,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:42,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518387009] [2023-08-24 11:13:42,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518387009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:13:42,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:13:42,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:13:42,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819179825] [2023-08-24 11:13:42,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:13:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:13:42,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:13:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:13:42,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:42,764 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) [2023-08-24 11:13:42,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:42,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:42,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:42,848 INFO L124 PetriNetUnfolderBase]: 94/152 cut-off events. [2023-08-24 11:13:42,848 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:13:42,849 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. [2023-08-24 11:13:42,850 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-08-24 11:13:42,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-08-24 11:13:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:13:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:13:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-24 11:13:42,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470703125 [2023-08-24 11:13:42,869 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-24 11:13:42,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-24 11:13:42,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:42,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-24 11:13:42,879 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) [2023-08-24 11:13:42,883 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) [2023-08-24 11:13:42,884 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) [2023-08-24 11:13:42,886 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 241 transitions. [2023-08-24 11:13:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-08-24 11:13:42,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:13:42,890 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-08-24 11:13:42,891 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} [2023-08-24 11:13:42,894 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-08-24 11:13:42,895 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-08-24 11:13:42,895 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) [2023-08-24 11:13:42,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:42,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:42,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:13:42,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:42,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash -722991115, now seen corresponding path program 1 times [2023-08-24 11:13:42,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:42,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890251646] [2023-08-24 11:13:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:42,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:43,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890251646] [2023-08-24 11:13:43,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890251646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:13:43,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:13:43,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:13:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19650666] [2023-08-24 11:13:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:13:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:13:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:13:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:13:43,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:43,028 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) [2023-08-24 11:13:43,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:43,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:43,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:43,146 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-24 11:13:43,146 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-24 11:13:43,149 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. [2023-08-24 11:13:43,150 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-24 11:13:43,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-08-24 11:13:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:13:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:13:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 356 transitions. [2023-08-24 11:13:43,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2023-08-24 11:13:43,153 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 356 transitions. [2023-08-24 11:13:43,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 356 transitions. [2023-08-24 11:13:43,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:43,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 356 transitions. [2023-08-24 11:13:43,155 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) [2023-08-24 11:13:43,157 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) [2023-08-24 11:13:43,158 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) [2023-08-24 11:13:43,158 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 356 transitions. [2023-08-24 11:13:43,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-08-24 11:13:43,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:13:43,166 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-08-24 11:13:43,166 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} [2023-08-24 11:13:43,167 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-08-24 11:13:43,167 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-08-24 11:13:43,167 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) [2023-08-24 11:13:43,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:43,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:43,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:13:43,168 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:43,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash -722976235, now seen corresponding path program 2 times [2023-08-24 11:13:43,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:43,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028794759] [2023-08-24 11:13:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:43,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028794759] [2023-08-24 11:13:43,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028794759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:13:43,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:13:43,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:13:43,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900946837] [2023-08-24 11:13:43,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:13:43,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:13:43,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:43,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:13:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:13:43,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:43,355 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) [2023-08-24 11:13:43,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:43,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:43,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:43,467 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-24 11:13:43,467 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2023-08-24 11:13:43,468 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. [2023-08-24 11:13:43,471 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-08-24 11:13:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-08-24 11:13:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:13:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:13:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-08-24 11:13:43,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609375 [2023-08-24 11:13:43,474 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-08-24 11:13:43,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-08-24 11:13:43,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:43,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-08-24 11:13:43,475 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) [2023-08-24 11:13:43,478 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) [2023-08-24 11:13:43,479 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) [2023-08-24 11:13:43,479 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 413 transitions. [2023-08-24 11:13:43,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-08-24 11:13:43,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-24 11:13:43,484 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-08-24 11:13:43,485 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} [2023-08-24 11:13:43,486 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-08-24 11:13:43,488 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-08-24 11:13:43,489 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) [2023-08-24 11:13:43,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:43,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:43,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:13:43,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:43,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1288779972, now seen corresponding path program 1 times [2023-08-24 11:13:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:43,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215643344] [2023-08-24 11:13:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:43,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:43,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:43,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215643344] [2023-08-24 11:13:43,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215643344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:13:43,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:13:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:13:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873395807] [2023-08-24 11:13:43,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:13:43,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 11:13:43,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:43,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 11:13:43,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 11:13:43,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:43,633 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) [2023-08-24 11:13:43,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:43,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:43,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:43,762 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-24 11:13:43,762 INFO L125 PetriNetUnfolderBase]: For 777/777 co-relation queries the response was YES. [2023-08-24 11:13:43,764 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. [2023-08-24 11:13:43,766 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-08-24 11:13:43,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-08-24 11:13:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 11:13:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 11:13:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2023-08-24 11:13:43,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458984375 [2023-08-24 11:13:43,770 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2023-08-24 11:13:43,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2023-08-24 11:13:43,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:43,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2023-08-24 11:13:43,771 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) [2023-08-24 11:13:43,774 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) [2023-08-24 11:13:43,774 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) [2023-08-24 11:13:43,774 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 470 transitions. [2023-08-24 11:13:43,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-08-24 11:13:43,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 11:13:43,783 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-08-24 11:13:43,783 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} [2023-08-24 11:13:43,785 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-08-24 11:13:43,785 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-08-24 11:13:43,785 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) [2023-08-24 11:13:43,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:43,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:43,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:13:43,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:43,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1319181672, now seen corresponding path program 2 times [2023-08-24 11:13:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:43,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878227867] [2023-08-24 11:13:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:43,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:43,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:43,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878227867] [2023-08-24 11:13:43,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878227867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:13:43,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:13:43,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:13:43,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720918701] [2023-08-24 11:13:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:13:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 11:13:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 11:13:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 11:13:43,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:43,888 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) [2023-08-24 11:13:43,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:43,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:43,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:44,011 INFO L124 PetriNetUnfolderBase]: 154/271 cut-off events. [2023-08-24 11:13:44,012 INFO L125 PetriNetUnfolderBase]: For 1323/1323 co-relation queries the response was YES. [2023-08-24 11:13:44,013 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. [2023-08-24 11:13:44,014 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-08-24 11:13:44,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-08-24 11:13:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:13:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:13:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 411 transitions. [2023-08-24 11:13:44,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45870535714285715 [2023-08-24 11:13:44,017 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 411 transitions. [2023-08-24 11:13:44,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 411 transitions. [2023-08-24 11:13:44,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:44,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 411 transitions. [2023-08-24 11:13:44,018 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) [2023-08-24 11:13:44,019 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) [2023-08-24 11:13:44,019 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) [2023-08-24 11:13:44,020 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 411 transitions. [2023-08-24 11:13:44,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-08-24 11:13:44,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-24 11:13:44,027 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-08-24 11:13:44,027 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} [2023-08-24 11:13:44,030 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-08-24 11:13:44,030 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-08-24 11:13:44,030 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) [2023-08-24 11:13:44,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:44,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:13:44,031 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:44,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash -2055022021, now seen corresponding path program 3 times [2023-08-24 11:13:44,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:44,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185882190] [2023-08-24 11:13:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:44,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185882190] [2023-08-24 11:13:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185882190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653547465] [2023-08-24 11:13:44,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 11:13:44,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:44,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:44,160 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) [2023-08-24 11:13:44,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 11:13:44,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 11:13:44,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:44,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 11:13:44,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:44,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:44,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653547465] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:44,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:44,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 11:13:44,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209257239] [2023-08-24 11:13:44,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:44,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 11:13:44,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:44,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 11:13:44,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-24 11:13:44,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:44,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 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) [2023-08-24 11:13:44,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:44,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:44,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:44,700 INFO L124 PetriNetUnfolderBase]: 202/351 cut-off events. [2023-08-24 11:13:44,700 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-08-24 11:13:44,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1199 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-08-24 11:13:44,703 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-08-24 11:13:44,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-08-24 11:13:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 11:13:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 11:13:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 816 transitions. [2023-08-24 11:13:44,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2023-08-24 11:13:44,706 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 816 transitions. [2023-08-24 11:13:44,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 816 transitions. [2023-08-24 11:13:44,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:44,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 816 transitions. [2023-08-24 11:13:44,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 58.285714285714285) internal successors, (816), 14 states have internal predecessors, (816), 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) [2023-08-24 11:13:44,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 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) [2023-08-24 11:13:44,712 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 128.0) internal successors, (1920), 15 states have internal predecessors, (1920), 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) [2023-08-24 11:13:44,712 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 816 transitions. [2023-08-24 11:13:44,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-08-24 11:13:44,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-24 11:13:44,719 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-08-24 11:13:44,720 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=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-24 11:13:44,720 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-08-24 11:13:44,720 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-08-24 11:13:44,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.84615384615385) internal successors, (713), 13 states have internal predecessors, (713), 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) [2023-08-24 11:13:44,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:44,721 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:44,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:44,927 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 [2023-08-24 11:13:44,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:44,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -728579416, now seen corresponding path program 4 times [2023-08-24 11:13:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:44,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547059396] [2023-08-24 11:13:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:44,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:45,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547059396] [2023-08-24 11:13:45,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547059396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:45,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049600035] [2023-08-24 11:13:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 11:13:45,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:45,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:45,080 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) [2023-08-24 11:13:45,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 11:13:45,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 11:13:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:45,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 11:13:45,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:45,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049600035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:45,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:45,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 11:13:45,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132859492] [2023-08-24 11:13:45,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 11:13:45,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 11:13:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-24 11:13:45,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:45,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 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) [2023-08-24 11:13:45,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:45,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:45,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:45,656 INFO L124 PetriNetUnfolderBase]: 258/463 cut-off events. [2023-08-24 11:13:45,656 INFO L125 PetriNetUnfolderBase]: For 4313/4313 co-relation queries the response was YES. [2023-08-24 11:13:45,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1653 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-08-24 11:13:45,660 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-08-24 11:13:45,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-08-24 11:13:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 11:13:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 11:13:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 931 transitions. [2023-08-24 11:13:45,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45458984375 [2023-08-24 11:13:45,663 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 931 transitions. [2023-08-24 11:13:45,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 931 transitions. [2023-08-24 11:13:45,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:45,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 931 transitions. [2023-08-24 11:13:45,666 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) [2023-08-24 11:13:45,669 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) [2023-08-24 11:13:45,670 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) [2023-08-24 11:13:45,670 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 931 transitions. [2023-08-24 11:13:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-08-24 11:13:45,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-24 11:13:45,684 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-08-24 11:13:45,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=506, 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=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-08-24 11:13:45,685 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-08-24 11:13:45,685 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-08-24 11:13:45,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 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) [2023-08-24 11:13:45,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:45,686 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:45,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:45,891 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 [2023-08-24 11:13:45,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:45,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:45,892 INFO L85 PathProgramCache]: Analyzing trace with hash 71425160, now seen corresponding path program 5 times [2023-08-24 11:13:45,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:45,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797537509] [2023-08-24 11:13:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:45,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797537509] [2023-08-24 11:13:46,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797537509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7094165] [2023-08-24 11:13:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 11:13:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:46,053 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) [2023-08-24 11:13:46,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 11:13:46,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 11:13:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:46,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 11:13:46,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:46,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7094165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:46,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:46,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 11:13:46,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912853691] [2023-08-24 11:13:46,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 11:13:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 11:13:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-24 11:13:46,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:46,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 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) [2023-08-24 11:13:46,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:46,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:46,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:46,793 INFO L124 PetriNetUnfolderBase]: 412/755 cut-off events. [2023-08-24 11:13:46,793 INFO L125 PetriNetUnfolderBase]: For 12133/12133 co-relation queries the response was YES. [2023-08-24 11:13:46,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12133/12133 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3352 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-08-24 11:13:46,800 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-08-24 11:13:46,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-08-24 11:13:46,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 11:13:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 11:13:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1280 transitions. [2023-08-24 11:13:46,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-24 11:13:46,825 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1280 transitions. [2023-08-24 11:13:46,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1280 transitions. [2023-08-24 11:13:46,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:46,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1280 transitions. [2023-08-24 11:13:46,828 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) [2023-08-24 11:13:46,832 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) [2023-08-24 11:13:46,834 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) [2023-08-24 11:13:46,834 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1280 transitions. [2023-08-24 11:13:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-08-24 11:13:46,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-08-24 11:13:46,880 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-08-24 11:13:46,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=678, 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=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-08-24 11:13:46,882 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-08-24 11:13:46,884 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-08-24 11:13:46,884 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) [2023-08-24 11:13:46,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:46,885 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:46,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:47,089 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 [2023-08-24 11:13:47,089 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:47,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash 527212936, now seen corresponding path program 6 times [2023-08-24 11:13:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636467020] [2023-08-24 11:13:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:47,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636467020] [2023-08-24 11:13:47,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636467020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:47,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894905776] [2023-08-24 11:13:47,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 11:13:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:47,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:47,194 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) [2023-08-24 11:13:47,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 11:13:47,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 11:13:47,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:47,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 11:13:47,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:47,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:47,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894905776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:47,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:47,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 11:13:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170165094] [2023-08-24 11:13:47,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:47,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 11:13:47,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 11:13:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-24 11:13:47,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:47,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 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) [2023-08-24 11:13:47,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:47,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:47,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:47,943 INFO L124 PetriNetUnfolderBase]: 612/1111 cut-off events. [2023-08-24 11:13:47,943 INFO L125 PetriNetUnfolderBase]: For 38007/38007 co-relation queries the response was YES. [2023-08-24 11:13:47,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 38007/38007 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5400 event pairs, 35 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-08-24 11:13:47,954 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-08-24 11:13:47,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-08-24 11:13:47,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 11:13:47,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 11:13:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1571 transitions. [2023-08-24 11:13:47,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45457175925925924 [2023-08-24 11:13:47,960 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1571 transitions. [2023-08-24 11:13:47,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1571 transitions. [2023-08-24 11:13:47,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:47,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1571 transitions. [2023-08-24 11:13:47,965 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) [2023-08-24 11:13:47,970 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) [2023-08-24 11:13:47,971 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) [2023-08-24 11:13:47,971 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1571 transitions. [2023-08-24 11:13:47,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-08-24 11:13:48,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-08-24 11:13:48,054 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-08-24 11:13:48,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=1256, 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=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-08-24 11:13:48,056 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-08-24 11:13:48,056 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-08-24 11:13:48,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.8125) internal successors, (877), 16 states have internal predecessors, (877), 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) [2023-08-24 11:13:48,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:48,057 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:48,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:48,262 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 [2023-08-24 11:13:48,262 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:48,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:48,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1394490875, now seen corresponding path program 7 times [2023-08-24 11:13:48,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:48,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090096075] [2023-08-24 11:13:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:48,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:48,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090096075] [2023-08-24 11:13:48,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090096075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633793787] [2023-08-24 11:13:48,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 11:13:48,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:48,382 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) [2023-08-24 11:13:48,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 11:13:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:48,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 11:13:48,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:48,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:13:48,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633793787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:48,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:48,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-24 11:13:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422626513] [2023-08-24 11:13:48,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:48,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 11:13:48,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:48,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 11:13:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-24 11:13:48,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:48,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 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) [2023-08-24 11:13:48,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:48,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:49,387 INFO L124 PetriNetUnfolderBase]: 756/1375 cut-off events. [2023-08-24 11:13:49,387 INFO L125 PetriNetUnfolderBase]: For 83402/83402 co-relation queries the response was YES. [2023-08-24 11:13:49,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12537 conditions, 1375 events. 756/1375 cut-off events. For 83402/83402 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6896 event pairs, 12 based on Foata normal form. 40/1415 useless extension candidates. Maximal degree in co-relation 12465. Up to 458 conditions per place. [2023-08-24 11:13:49,404 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 62 selfloop transitions, 176 changer transitions 54/292 dead transitions. [2023-08-24 11:13:49,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 292 transitions, 6017 flow [2023-08-24 11:13:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 11:13:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 11:13:49,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1744 transitions. [2023-08-24 11:13:49,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45416666666666666 [2023-08-24 11:13:49,407 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1744 transitions. [2023-08-24 11:13:49,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1744 transitions. [2023-08-24 11:13:49,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:49,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1744 transitions. [2023-08-24 11:13:49,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 58.13333333333333) internal successors, (1744), 30 states have internal predecessors, (1744), 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) [2023-08-24 11:13:49,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 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) [2023-08-24 11:13:49,416 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 128.0) internal successors, (3968), 31 states have internal predecessors, (3968), 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) [2023-08-24 11:13:49,417 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 30 states and 1744 transitions. [2023-08-24 11:13:49,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 292 transitions, 6017 flow [2023-08-24 11:13:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 292 transitions, 4596 flow, removed 681 selfloop flow, removed 11 redundant places. [2023-08-24 11:13:49,616 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 3515 flow [2023-08-24 11:13:49,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3515, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2023-08-24 11:13:49,617 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 168 predicate places. [2023-08-24 11:13:49,617 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 3515 flow [2023-08-24 11:13:49,618 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) [2023-08-24 11:13:49,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:49,618 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:49,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:49,823 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 [2023-08-24 11:13:49,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:49,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:49,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1391431136, now seen corresponding path program 8 times [2023-08-24 11:13:49,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:49,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417280061] [2023-08-24 11:13:49,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:49,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:50,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417280061] [2023-08-24 11:13:50,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417280061] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:50,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274783376] [2023-08-24 11:13:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 11:13:50,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:50,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:50,047 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) [2023-08-24 11:13:50,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 11:13:50,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 11:13:50,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:50,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 11:13:50,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:50,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:50,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:50,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274783376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:50,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:50,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-08-24 11:13:50,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215068607] [2023-08-24 11:13:50,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:50,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 11:13:50,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 11:13:50,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2023-08-24 11:13:50,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:50,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 3515 flow. Second operand has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 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) [2023-08-24 11:13:50,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:50,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:50,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:51,863 INFO L124 PetriNetUnfolderBase]: 916/1643 cut-off events. [2023-08-24 11:13:51,863 INFO L125 PetriNetUnfolderBase]: For 111678/111678 co-relation queries the response was YES. [2023-08-24 11:13:51,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15915 conditions, 1643 events. 916/1643 cut-off events. For 111678/111678 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7887 event pairs, 18 based on Foata normal form. 44/1687 useless extension candidates. Maximal degree in co-relation 15830. Up to 558 conditions per place. [2023-08-24 11:13:51,884 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 86 selfloop transitions, 216 changer transitions 90/392 dead transitions. [2023-08-24 11:13:51,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 392 transitions, 8350 flow [2023-08-24 11:13:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 11:13:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 11:13:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2782 transitions. [2023-08-24 11:13:51,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527994791666667 [2023-08-24 11:13:51,889 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2782 transitions. [2023-08-24 11:13:51,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2782 transitions. [2023-08-24 11:13:51,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:51,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2782 transitions. [2023-08-24 11:13:51,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 57.958333333333336) internal successors, (2782), 48 states have internal predecessors, (2782), 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) [2023-08-24 11:13:51,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 128.0) internal successors, (6272), 49 states have internal predecessors, (6272), 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) [2023-08-24 11:13:51,901 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 128.0) internal successors, (6272), 49 states have internal predecessors, (6272), 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) [2023-08-24 11:13:51,901 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 3515 flow. Second operand 48 states and 2782 transitions. [2023-08-24 11:13:51,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 392 transitions, 8350 flow [2023-08-24 11:13:52,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 392 transitions, 7489 flow, removed 402 selfloop flow, removed 8 redundant places. [2023-08-24 11:13:52,193 INFO L231 Difference]: Finished difference. Result has 247 places, 242 transitions, 4892 flow [2023-08-24 11:13:52,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4892, PETRI_PLACES=247, PETRI_TRANSITIONS=242} [2023-08-24 11:13:52,194 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 229 predicate places. [2023-08-24 11:13:52,194 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 242 transitions, 4892 flow [2023-08-24 11:13:52,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 54.36666666666667) internal successors, (1631), 30 states have internal predecessors, (1631), 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) [2023-08-24 11:13:52,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:52,195 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:52,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:52,401 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 [2023-08-24 11:13:52,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:52,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 440369608, now seen corresponding path program 9 times [2023-08-24 11:13:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381795877] [2023-08-24 11:13:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:52,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381795877] [2023-08-24 11:13:52,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381795877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:52,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482889544] [2023-08-24 11:13:52,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 11:13:52,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:52,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:52,887 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) [2023-08-24 11:13:52,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 11:13:52,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-24 11:13:52,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:52,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:13:52,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:53,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482889544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:53,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:53,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:13:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489348408] [2023-08-24 11:13:53,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:53,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:13:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:13:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:13:53,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:53,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 242 transitions, 4892 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:13:53,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:53,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:53,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:54,170 INFO L124 PetriNetUnfolderBase]: 996/1803 cut-off events. [2023-08-24 11:13:54,170 INFO L125 PetriNetUnfolderBase]: For 180876/180876 co-relation queries the response was YES. [2023-08-24 11:13:54,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21146 conditions, 1803 events. 996/1803 cut-off events. For 180876/180876 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8870 event pairs, 302 based on Foata normal form. 8/1811 useless extension candidates. Maximal degree in co-relation 21039. Up to 1201 conditions per place. [2023-08-24 11:13:54,202 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 220 selfloop transitions, 72 changer transitions 47/339 dead transitions. [2023-08-24 11:13:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 339 transitions, 8260 flow [2023-08-24 11:13:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 11:13:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 11:13:54,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1495 transitions. [2023-08-24 11:13:54,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2023-08-24 11:13:54,205 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1495 transitions. [2023-08-24 11:13:54,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1495 transitions. [2023-08-24 11:13:54,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:54,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1495 transitions. [2023-08-24 11:13:54,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.5) internal successors, (1495), 26 states have internal predecessors, (1495), 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) [2023-08-24 11:13:54,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 128.0) internal successors, (3456), 27 states have internal predecessors, (3456), 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) [2023-08-24 11:13:54,213 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 128.0) internal successors, (3456), 27 states have internal predecessors, (3456), 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) [2023-08-24 11:13:54,213 INFO L175 Difference]: Start difference. First operand has 247 places, 242 transitions, 4892 flow. Second operand 26 states and 1495 transitions. [2023-08-24 11:13:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 339 transitions, 8260 flow [2023-08-24 11:13:54,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 339 transitions, 6421 flow, removed 847 selfloop flow, removed 16 redundant places. [2023-08-24 11:13:54,701 INFO L231 Difference]: Finished difference. Result has 268 places, 262 transitions, 4311 flow [2023-08-24 11:13:54,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4311, PETRI_PLACES=268, PETRI_TRANSITIONS=262} [2023-08-24 11:13:54,702 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 250 predicate places. [2023-08-24 11:13:54,702 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 262 transitions, 4311 flow [2023-08-24 11:13:54,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:13:54,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:54,703 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:54,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:54,908 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 [2023-08-24 11:13:54,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:54,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:54,909 INFO L85 PathProgramCache]: Analyzing trace with hash -16617380, now seen corresponding path program 10 times [2023-08-24 11:13:54,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:54,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602554350] [2023-08-24 11:13:54,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:54,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:55,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602554350] [2023-08-24 11:13:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602554350] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173013882] [2023-08-24 11:13:55,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 11:13:55,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:55,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:55,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:13:55,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 11:13:55,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 11:13:55,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:55,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:13:55,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:55,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:55,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173013882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:55,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:55,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:13:55,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130193271] [2023-08-24 11:13:55,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:55,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:13:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:55,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:13:55,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:13:55,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:55,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 262 transitions, 4311 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:13:55,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:55,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:55,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:56,899 INFO L124 PetriNetUnfolderBase]: 1124/2059 cut-off events. [2023-08-24 11:13:56,899 INFO L125 PetriNetUnfolderBase]: For 231196/231196 co-relation queries the response was YES. [2023-08-24 11:13:56,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23304 conditions, 2059 events. 1124/2059 cut-off events. For 231196/231196 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10449 event pairs, 106 based on Foata normal form. 8/2067 useless extension candidates. Maximal degree in co-relation 23184. Up to 766 conditions per place. [2023-08-24 11:13:56,928 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 130 selfloop transitions, 202 changer transitions 61/393 dead transitions. [2023-08-24 11:13:56,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 393 transitions, 7835 flow [2023-08-24 11:13:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 11:13:56,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 11:13:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1903 transitions. [2023-08-24 11:13:56,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-24 11:13:56,931 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1903 transitions. [2023-08-24 11:13:56,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1903 transitions. [2023-08-24 11:13:56,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:56,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1903 transitions. [2023-08-24 11:13:56,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.666666666666664) internal successors, (1903), 33 states have internal predecessors, (1903), 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) [2023-08-24 11:13:56,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 128.0) internal successors, (4352), 34 states have internal predecessors, (4352), 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) [2023-08-24 11:13:56,941 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 128.0) internal successors, (4352), 34 states have internal predecessors, (4352), 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) [2023-08-24 11:13:56,941 INFO L175 Difference]: Start difference. First operand has 268 places, 262 transitions, 4311 flow. Second operand 33 states and 1903 transitions. [2023-08-24 11:13:56,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 393 transitions, 7835 flow [2023-08-24 11:13:57,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 393 transitions, 7646 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-08-24 11:13:57,534 INFO L231 Difference]: Finished difference. Result has 309 places, 295 transitions, 5449 flow [2023-08-24 11:13:57,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5449, PETRI_PLACES=309, PETRI_TRANSITIONS=295} [2023-08-24 11:13:57,535 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 291 predicate places. [2023-08-24 11:13:57,535 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 295 transitions, 5449 flow [2023-08-24 11:13:57,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:13:57,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:13:57,536 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:13:57,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 11:13:57,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 11:13:57,742 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:13:57,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:13:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1670387920, now seen corresponding path program 11 times [2023-08-24 11:13:57,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:13:57,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112352647] [2023-08-24 11:13:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:13:57,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:13:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:13:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:58,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:13:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112352647] [2023-08-24 11:13:58,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112352647] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:13:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712444254] [2023-08-24 11:13:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 11:13:58,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:13:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:13:58,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:13:58,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 11:13:58,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-24 11:13:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:13:58,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:13:58,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:13:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:58,246 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:13:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:13:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712444254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:13:58,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:13:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:13:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247768093] [2023-08-24 11:13:58,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:13:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:13:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:13:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:13:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:13:58,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:13:58,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 295 transitions, 5449 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:13:58,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:13:58,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:13:58,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:13:59,604 INFO L124 PetriNetUnfolderBase]: 1236/2283 cut-off events. [2023-08-24 11:13:59,604 INFO L125 PetriNetUnfolderBase]: For 290058/290058 co-relation queries the response was YES. [2023-08-24 11:13:59,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27579 conditions, 2283 events. 1236/2283 cut-off events. For 290058/290058 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11917 event pairs, 108 based on Foata normal form. 8/2291 useless extension candidates. Maximal degree in co-relation 27443. Up to 878 conditions per place. [2023-08-24 11:13:59,640 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 124 selfloop transitions, 234 changer transitions 59/417 dead transitions. [2023-08-24 11:13:59,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 417 transitions, 9151 flow [2023-08-24 11:13:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 11:13:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 11:13:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1842 transitions. [2023-08-24 11:13:59,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44970703125 [2023-08-24 11:13:59,644 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1842 transitions. [2023-08-24 11:13:59,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1842 transitions. [2023-08-24 11:13:59,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:13:59,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1842 transitions. [2023-08-24 11:13:59,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.5625) internal successors, (1842), 32 states have internal predecessors, (1842), 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) [2023-08-24 11:13:59,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 128.0) internal successors, (4224), 33 states have internal predecessors, (4224), 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) [2023-08-24 11:13:59,653 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 128.0) internal successors, (4224), 33 states have internal predecessors, (4224), 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) [2023-08-24 11:13:59,653 INFO L175 Difference]: Start difference. First operand has 309 places, 295 transitions, 5449 flow. Second operand 32 states and 1842 transitions. [2023-08-24 11:13:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 417 transitions, 9151 flow [2023-08-24 11:14:00,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 417 transitions, 8642 flow, removed 160 selfloop flow, removed 15 redundant places. [2023-08-24 11:14:00,649 INFO L231 Difference]: Finished difference. Result has 339 places, 324 transitions, 6358 flow [2023-08-24 11:14:00,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6358, PETRI_PLACES=339, PETRI_TRANSITIONS=324} [2023-08-24 11:14:00,650 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 321 predicate places. [2023-08-24 11:14:00,650 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 324 transitions, 6358 flow [2023-08-24 11:14:00,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:00,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:00,650 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:00,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:00,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 11:14:00,851 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:00,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash 421364436, now seen corresponding path program 12 times [2023-08-24 11:14:00,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:00,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105236972] [2023-08-24 11:14:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:00,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:01,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105236972] [2023-08-24 11:14:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105236972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921997702] [2023-08-24 11:14:01,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 11:14:01,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:01,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:01,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:01,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 11:14:01,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-24 11:14:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:01,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:01,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:01,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:01,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921997702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:01,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181298647] [2023-08-24 11:14:01,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:01,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:01,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:01,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 324 transitions, 6358 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:01,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:01,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:03,131 INFO L124 PetriNetUnfolderBase]: 1340/2491 cut-off events. [2023-08-24 11:14:03,132 INFO L125 PetriNetUnfolderBase]: For 341680/341680 co-relation queries the response was YES. [2023-08-24 11:14:03,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31070 conditions, 2491 events. 1340/2491 cut-off events. For 341680/341680 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13339 event pairs, 88 based on Foata normal form. 8/2499 useless extension candidates. Maximal degree in co-relation 30919. Up to 966 conditions per place. [2023-08-24 11:14:03,171 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 122 selfloop transitions, 268 changer transitions 65/455 dead transitions. [2023-08-24 11:14:03,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 455 transitions, 10283 flow [2023-08-24 11:14:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 11:14:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 11:14:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2019 transitions. [2023-08-24 11:14:03,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45066964285714284 [2023-08-24 11:14:03,176 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2019 transitions. [2023-08-24 11:14:03,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2019 transitions. [2023-08-24 11:14:03,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:03,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2019 transitions. [2023-08-24 11:14:03,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.68571428571428) internal successors, (2019), 35 states have internal predecessors, (2019), 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) [2023-08-24 11:14:03,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 128.0) internal successors, (4608), 36 states have internal predecessors, (4608), 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) [2023-08-24 11:14:03,187 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 128.0) internal successors, (4608), 36 states have internal predecessors, (4608), 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) [2023-08-24 11:14:03,187 INFO L175 Difference]: Start difference. First operand has 339 places, 324 transitions, 6358 flow. Second operand 35 states and 2019 transitions. [2023-08-24 11:14:03,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 455 transitions, 10283 flow [2023-08-24 11:14:04,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 455 transitions, 9611 flow, removed 199 selfloop flow, removed 16 redundant places. [2023-08-24 11:14:04,309 INFO L231 Difference]: Finished difference. Result has 370 places, 351 transitions, 7231 flow [2023-08-24 11:14:04,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7231, PETRI_PLACES=370, PETRI_TRANSITIONS=351} [2023-08-24 11:14:04,309 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 352 predicate places. [2023-08-24 11:14:04,309 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 351 transitions, 7231 flow [2023-08-24 11:14:04,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:04,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:04,310 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:04,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:04,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 11:14:04,516 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:04,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:04,517 INFO L85 PathProgramCache]: Analyzing trace with hash 526462888, now seen corresponding path program 13 times [2023-08-24 11:14:04,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:04,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469844510] [2023-08-24 11:14:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:04,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:04,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469844510] [2023-08-24 11:14:04,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469844510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:04,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436437274] [2023-08-24 11:14:04,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 11:14:04,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:04,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:04,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:04,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 11:14:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:04,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:04,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:05,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:05,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436437274] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:05,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:05,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:14:05,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847516984] [2023-08-24 11:14:05,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:05,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:14:05,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:05,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:14:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:14:05,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:05,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 351 transitions, 7231 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:05,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:05,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:05,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:06,530 INFO L124 PetriNetUnfolderBase]: 1428/2667 cut-off events. [2023-08-24 11:14:06,531 INFO L125 PetriNetUnfolderBase]: For 377917/377917 co-relation queries the response was YES. [2023-08-24 11:14:06,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34016 conditions, 2667 events. 1428/2667 cut-off events. For 377917/377917 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14589 event pairs, 86 based on Foata normal form. 8/2675 useless extension candidates. Maximal degree in co-relation 33851. Up to 1046 conditions per place. [2023-08-24 11:14:06,642 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 113 selfloop transitions, 297 changer transitions 63/473 dead transitions. [2023-08-24 11:14:06,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 473 transitions, 11197 flow [2023-08-24 11:14:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 11:14:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 11:14:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1958 transitions. [2023-08-24 11:14:06,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4499080882352941 [2023-08-24 11:14:06,647 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1958 transitions. [2023-08-24 11:14:06,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1958 transitions. [2023-08-24 11:14:06,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:06,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1958 transitions. [2023-08-24 11:14:06,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.588235294117645) internal successors, (1958), 34 states have internal predecessors, (1958), 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) [2023-08-24 11:14:06,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 128.0) internal successors, (4480), 35 states have internal predecessors, (4480), 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) [2023-08-24 11:14:06,657 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 128.0) internal successors, (4480), 35 states have internal predecessors, (4480), 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) [2023-08-24 11:14:06,658 INFO L175 Difference]: Start difference. First operand has 370 places, 351 transitions, 7231 flow. Second operand 34 states and 1958 transitions. [2023-08-24 11:14:06,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 473 transitions, 11197 flow [2023-08-24 11:14:07,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 473 transitions, 10511 flow, removed 188 selfloop flow, removed 20 redundant places. [2023-08-24 11:14:07,982 INFO L231 Difference]: Finished difference. Result has 395 places, 375 transitions, 8075 flow [2023-08-24 11:14:07,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=6637, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8075, PETRI_PLACES=395, PETRI_TRANSITIONS=375} [2023-08-24 11:14:07,983 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 377 predicate places. [2023-08-24 11:14:07,983 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 375 transitions, 8075 flow [2023-08-24 11:14:07,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:07,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:07,983 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:07,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 11:14:08,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 11:14:08,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:08,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:08,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2125609052, now seen corresponding path program 14 times [2023-08-24 11:14:08,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:08,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368602191] [2023-08-24 11:14:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:08,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:08,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:08,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368602191] [2023-08-24 11:14:08,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368602191] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:08,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945129] [2023-08-24 11:14:08,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 11:14:08,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:08,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:08,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:08,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 11:14:08,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 11:14:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:08,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:08,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:08,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:08,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:08,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:14:08,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887900261] [2023-08-24 11:14:08,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:08,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:14:08,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:14:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:14:08,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:08,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 375 transitions, 8075 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:08,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:08,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:08,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:10,250 INFO L124 PetriNetUnfolderBase]: 1508/2827 cut-off events. [2023-08-24 11:14:10,250 INFO L125 PetriNetUnfolderBase]: For 416378/416378 co-relation queries the response was YES. [2023-08-24 11:14:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36901 conditions, 2827 events. 1508/2827 cut-off events. For 416378/416378 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 15679 event pairs, 64 based on Foata normal form. 8/2835 useless extension candidates. Maximal degree in co-relation 36723. Up to 1118 conditions per place. [2023-08-24 11:14:10,291 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 105 selfloop transitions, 328 changer transitions 67/500 dead transitions. [2023-08-24 11:14:10,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 500 transitions, 12257 flow [2023-08-24 11:14:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 11:14:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 11:14:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2074 transitions. [2023-08-24 11:14:10,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4500868055555556 [2023-08-24 11:14:10,295 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2074 transitions. [2023-08-24 11:14:10,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2074 transitions. [2023-08-24 11:14:10,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:10,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2074 transitions. [2023-08-24 11:14:10,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.611111111111114) internal successors, (2074), 36 states have internal predecessors, (2074), 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) [2023-08-24 11:14:10,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 128.0) internal successors, (4736), 37 states have internal predecessors, (4736), 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) [2023-08-24 11:14:10,305 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 128.0) internal successors, (4736), 37 states have internal predecessors, (4736), 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) [2023-08-24 11:14:10,305 INFO L175 Difference]: Start difference. First operand has 395 places, 375 transitions, 8075 flow. Second operand 36 states and 2074 transitions. [2023-08-24 11:14:10,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 500 transitions, 12257 flow [2023-08-24 11:14:11,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 500 transitions, 11544 flow, removed 186 selfloop flow, removed 20 redundant places. [2023-08-24 11:14:11,948 INFO L231 Difference]: Finished difference. Result has 420 places, 396 transitions, 8911 flow [2023-08-24 11:14:11,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=8911, PETRI_PLACES=420, PETRI_TRANSITIONS=396} [2023-08-24 11:14:11,948 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 402 predicate places. [2023-08-24 11:14:11,949 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 396 transitions, 8911 flow [2023-08-24 11:14:11,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:11,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:11,949 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:11,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:12,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 11:14:12,155 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:12,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1962810940, now seen corresponding path program 15 times [2023-08-24 11:14:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336980644] [2023-08-24 11:14:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:12,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:12,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336980644] [2023-08-24 11:14:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336980644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102405957] [2023-08-24 11:14:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 11:14:12,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:12,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:12,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 11:14:12,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-24 11:14:12,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:12,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:12,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:12,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:12,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102405957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:12,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:12,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249259765] [2023-08-24 11:14:12,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:12,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:12,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 396 transitions, 8911 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:12,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:12,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:12,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:14,538 INFO L124 PetriNetUnfolderBase]: 1592/2991 cut-off events. [2023-08-24 11:14:14,538 INFO L125 PetriNetUnfolderBase]: For 447397/447397 co-relation queries the response was YES. [2023-08-24 11:14:14,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39762 conditions, 2991 events. 1592/2991 cut-off events. For 447397/447397 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 16874 event pairs, 50 based on Foata normal form. 8/2999 useless extension candidates. Maximal degree in co-relation 39573. Up to 1194 conditions per place. [2023-08-24 11:14:14,587 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 104 selfloop transitions, 356 changer transitions 73/533 dead transitions. [2023-08-24 11:14:14,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 533 transitions, 13280 flow [2023-08-24 11:14:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 11:14:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 11:14:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2251 transitions. [2023-08-24 11:14:14,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45092147435897434 [2023-08-24 11:14:14,591 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2251 transitions. [2023-08-24 11:14:14,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2251 transitions. [2023-08-24 11:14:14,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:14,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2251 transitions. [2023-08-24 11:14:14,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 57.717948717948715) internal successors, (2251), 39 states have internal predecessors, (2251), 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) [2023-08-24 11:14:14,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 128.0) internal successors, (5120), 40 states have internal predecessors, (5120), 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) [2023-08-24 11:14:14,603 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 128.0) internal successors, (5120), 40 states have internal predecessors, (5120), 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) [2023-08-24 11:14:14,603 INFO L175 Difference]: Start difference. First operand has 420 places, 396 transitions, 8911 flow. Second operand 39 states and 2251 transitions. [2023-08-24 11:14:14,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 533 transitions, 13280 flow [2023-08-24 11:14:16,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 533 transitions, 12489 flow, removed 188 selfloop flow, removed 24 redundant places. [2023-08-24 11:14:16,232 INFO L231 Difference]: Finished difference. Result has 443 places, 418 transitions, 9700 flow [2023-08-24 11:14:16,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=8218, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9700, PETRI_PLACES=443, PETRI_TRANSITIONS=418} [2023-08-24 11:14:16,233 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 425 predicate places. [2023-08-24 11:14:16,233 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 418 transitions, 9700 flow [2023-08-24 11:14:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:16,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:16,233 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:16,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:16,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 11:14:16,434 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:16,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -725181256, now seen corresponding path program 16 times [2023-08-24 11:14:16,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:16,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815993912] [2023-08-24 11:14:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:16,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:16,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:16,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815993912] [2023-08-24 11:14:16,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815993912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:16,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170354248] [2023-08-24 11:14:16,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 11:14:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:16,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:16,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:16,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 11:14:16,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 11:14:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:16,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:16,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:16,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170354248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:17,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:17,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830842990] [2023-08-24 11:14:17,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:17,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 418 transitions, 9700 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:17,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:17,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:19,021 INFO L124 PetriNetUnfolderBase]: 1672/3143 cut-off events. [2023-08-24 11:14:19,021 INFO L125 PetriNetUnfolderBase]: For 488865/488865 co-relation queries the response was YES. [2023-08-24 11:14:19,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42524 conditions, 3143 events. 1672/3143 cut-off events. For 488865/488865 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 17986 event pairs, 46 based on Foata normal form. 8/3151 useless extension candidates. Maximal degree in co-relation 42325. Up to 1258 conditions per place. [2023-08-24 11:14:19,069 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 101 selfloop transitions, 382 changer transitions 77/560 dead transitions. [2023-08-24 11:14:19,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 560 transitions, 14305 flow [2023-08-24 11:14:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 11:14:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 11:14:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2367 transitions. [2023-08-24 11:14:19,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45102896341463417 [2023-08-24 11:14:19,073 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2367 transitions. [2023-08-24 11:14:19,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2367 transitions. [2023-08-24 11:14:19,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:19,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2367 transitions. [2023-08-24 11:14:19,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.73170731707317) internal successors, (2367), 41 states have internal predecessors, (2367), 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) [2023-08-24 11:14:19,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 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) [2023-08-24 11:14:19,082 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 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) [2023-08-24 11:14:19,082 INFO L175 Difference]: Start difference. First operand has 443 places, 418 transitions, 9700 flow. Second operand 41 states and 2367 transitions. [2023-08-24 11:14:19,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 560 transitions, 14305 flow [2023-08-24 11:14:20,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 560 transitions, 13510 flow, removed 188 selfloop flow, removed 26 redundant places. [2023-08-24 11:14:20,596 INFO L231 Difference]: Finished difference. Result has 466 places, 439 transitions, 10493 flow [2023-08-24 11:14:20,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=8989, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=10493, PETRI_PLACES=466, PETRI_TRANSITIONS=439} [2023-08-24 11:14:20,597 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 448 predicate places. [2023-08-24 11:14:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 439 transitions, 10493 flow [2023-08-24 11:14:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:20,598 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:20,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:20,803 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:20,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:20,804 INFO L85 PathProgramCache]: Analyzing trace with hash -798917360, now seen corresponding path program 17 times [2023-08-24 11:14:20,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:20,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883439025] [2023-08-24 11:14:20,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:20,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:21,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:21,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883439025] [2023-08-24 11:14:21,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883439025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:21,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136585253] [2023-08-24 11:14:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 11:14:21,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:21,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:21,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:21,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 11:14:21,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-24 11:14:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:21,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:21,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:21,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:21,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136585253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:21,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:21,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:14:21,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173812942] [2023-08-24 11:14:21,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:21,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:14:21,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:21,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:14:21,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:14:21,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:21,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 439 transitions, 10493 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:21,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:21,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:21,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:23,205 INFO L124 PetriNetUnfolderBase]: 1732/3259 cut-off events. [2023-08-24 11:14:23,205 INFO L125 PetriNetUnfolderBase]: For 532752/532752 co-relation queries the response was YES. [2023-08-24 11:14:23,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44984 conditions, 3259 events. 1732/3259 cut-off events. For 532752/532752 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 18849 event pairs, 50 based on Foata normal form. 8/3267 useless extension candidates. Maximal degree in co-relation 44775. Up to 1306 conditions per place. [2023-08-24 11:14:23,260 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 98 selfloop transitions, 398 changer transitions 75/571 dead transitions. [2023-08-24 11:14:23,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 571 transitions, 15164 flow [2023-08-24 11:14:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 11:14:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 11:14:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2306 transitions. [2023-08-24 11:14:23,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450390625 [2023-08-24 11:14:23,265 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2306 transitions. [2023-08-24 11:14:23,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2306 transitions. [2023-08-24 11:14:23,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:23,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2306 transitions. [2023-08-24 11:14:23,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.65) internal successors, (2306), 40 states have internal predecessors, (2306), 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) [2023-08-24 11:14:23,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 128.0) internal successors, (5248), 41 states have internal predecessors, (5248), 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) [2023-08-24 11:14:23,275 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 128.0) internal successors, (5248), 41 states have internal predecessors, (5248), 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) [2023-08-24 11:14:23,275 INFO L175 Difference]: Start difference. First operand has 466 places, 439 transitions, 10493 flow. Second operand 40 states and 2306 transitions. [2023-08-24 11:14:23,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 571 transitions, 15164 flow [2023-08-24 11:14:25,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 571 transitions, 14345 flow, removed 178 selfloop flow, removed 28 redundant places. [2023-08-24 11:14:25,064 INFO L231 Difference]: Finished difference. Result has 484 places, 455 transitions, 11210 flow [2023-08-24 11:14:25,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=9752, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=11210, PETRI_PLACES=484, PETRI_TRANSITIONS=455} [2023-08-24 11:14:25,065 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 466 predicate places. [2023-08-24 11:14:25,065 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 455 transitions, 11210 flow [2023-08-24 11:14:25,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:25,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:25,065 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:25,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:25,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:25,267 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:25,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash 4929716, now seen corresponding path program 18 times [2023-08-24 11:14:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:25,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975792229] [2023-08-24 11:14:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:25,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975792229] [2023-08-24 11:14:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975792229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271958919] [2023-08-24 11:14:25,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 11:14:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:25,580 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:25,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 11:14:25,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-24 11:14:25,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:25,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-24 11:14:25,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:25,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271958919] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:25,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161041200] [2023-08-24 11:14:25,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:25,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:25,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:25,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:25,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 455 transitions, 11210 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:25,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:25,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:25,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:27,746 INFO L124 PetriNetUnfolderBase]: 1784/3359 cut-off events. [2023-08-24 11:14:27,746 INFO L125 PetriNetUnfolderBase]: For 562232/562232 co-relation queries the response was YES. [2023-08-24 11:14:27,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47050 conditions, 3359 events. 1784/3359 cut-off events. For 562232/562232 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 19522 event pairs, 44 based on Foata normal form. 8/3367 useless extension candidates. Maximal degree in co-relation 46833. Up to 1346 conditions per place. [2023-08-24 11:14:27,796 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 97 selfloop transitions, 414 changer transitions 77/588 dead transitions. [2023-08-24 11:14:27,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 588 transitions, 16031 flow [2023-08-24 11:14:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 11:14:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 11:14:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2364 transitions. [2023-08-24 11:14:27,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4504573170731707 [2023-08-24 11:14:27,798 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2364 transitions. [2023-08-24 11:14:27,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2364 transitions. [2023-08-24 11:14:27,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:27,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2364 transitions. [2023-08-24 11:14:27,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.65853658536585) internal successors, (2364), 41 states have internal predecessors, (2364), 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) [2023-08-24 11:14:27,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 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) [2023-08-24 11:14:27,806 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 128.0) internal successors, (5376), 42 states have internal predecessors, (5376), 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) [2023-08-24 11:14:27,806 INFO L175 Difference]: Start difference. First operand has 484 places, 455 transitions, 11210 flow. Second operand 41 states and 2364 transitions. [2023-08-24 11:14:27,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 588 transitions, 16031 flow [2023-08-24 11:14:29,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 588 transitions, 15107 flow, removed 180 selfloop flow, removed 31 redundant places. [2023-08-24 11:14:29,847 INFO L231 Difference]: Finished difference. Result has 499 places, 469 transitions, 11838 flow [2023-08-24 11:14:29,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11838, PETRI_PLACES=499, PETRI_TRANSITIONS=469} [2023-08-24 11:14:29,848 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 481 predicate places. [2023-08-24 11:14:29,849 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 469 transitions, 11838 flow [2023-08-24 11:14:29,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:29,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:29,849 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:29,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:30,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:30,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:30,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:30,053 INFO L85 PathProgramCache]: Analyzing trace with hash 559042316, now seen corresponding path program 19 times [2023-08-24 11:14:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:30,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105510965] [2023-08-24 11:14:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:30,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:30,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:30,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105510965] [2023-08-24 11:14:30,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105510965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:30,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136543396] [2023-08-24 11:14:30,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 11:14:30,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:30,401 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:30,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 11:14:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:30,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:30,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:30,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:30,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136543396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:30,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:14:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194290907] [2023-08-24 11:14:30,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:14:30,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:14:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:14:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:30,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 469 transitions, 11838 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:32,691 INFO L124 PetriNetUnfolderBase]: 1828/3443 cut-off events. [2023-08-24 11:14:32,691 INFO L125 PetriNetUnfolderBase]: For 590492/590492 co-relation queries the response was YES. [2023-08-24 11:14:32,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48788 conditions, 3443 events. 1828/3443 cut-off events. For 590492/590492 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 20179 event pairs, 37 based on Foata normal form. 8/3451 useless extension candidates. Maximal degree in co-relation 48565. Up to 1378 conditions per place. [2023-08-24 11:14:32,747 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 96 selfloop transitions, 428 changer transitions 79/603 dead transitions. [2023-08-24 11:14:32,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 603 transitions, 16771 flow [2023-08-24 11:14:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 11:14:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 11:14:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2422 transitions. [2023-08-24 11:14:32,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505208333333333 [2023-08-24 11:14:32,750 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2422 transitions. [2023-08-24 11:14:32,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2422 transitions. [2023-08-24 11:14:32,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:32,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2422 transitions. [2023-08-24 11:14:32,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.666666666666664) internal successors, (2422), 42 states have internal predecessors, (2422), 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) [2023-08-24 11:14:32,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 128.0) internal successors, (5504), 43 states have internal predecessors, (5504), 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) [2023-08-24 11:14:32,756 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 128.0) internal successors, (5504), 43 states have internal predecessors, (5504), 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) [2023-08-24 11:14:32,756 INFO L175 Difference]: Start difference. First operand has 499 places, 469 transitions, 11838 flow. Second operand 42 states and 2422 transitions. [2023-08-24 11:14:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 603 transitions, 16771 flow [2023-08-24 11:14:34,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 603 transitions, 15816 flow, removed 179 selfloop flow, removed 33 redundant places. [2023-08-24 11:14:34,729 INFO L231 Difference]: Finished difference. Result has 512 places, 481 transitions, 12377 flow [2023-08-24 11:14:34,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=12377, PETRI_PLACES=512, PETRI_TRANSITIONS=481} [2023-08-24 11:14:34,730 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 494 predicate places. [2023-08-24 11:14:34,730 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 481 transitions, 12377 flow [2023-08-24 11:14:34,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:34,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:34,731 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:34,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:34,936 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:34,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 573341996, now seen corresponding path program 20 times [2023-08-24 11:14:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:34,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337921954] [2023-08-24 11:14:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:35,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337921954] [2023-08-24 11:14:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337921954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280348267] [2023-08-24 11:14:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 11:14:35,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:35,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:35,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:35,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 11:14:35,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 11:14:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:35,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:35,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:35,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280348267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:35,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172991154] [2023-08-24 11:14:35,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:35,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:35,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:35,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:35,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 481 transitions, 12377 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:35,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:35,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:35,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:37,882 INFO L124 PetriNetUnfolderBase]: 1864/3511 cut-off events. [2023-08-24 11:14:37,882 INFO L125 PetriNetUnfolderBase]: For 617476/617476 co-relation queries the response was YES. [2023-08-24 11:14:37,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50391 conditions, 3511 events. 1864/3511 cut-off events. For 617476/617476 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 20636 event pairs, 21 based on Foata normal form. 8/3519 useless extension candidates. Maximal degree in co-relation 50163. Up to 1402 conditions per place. [2023-08-24 11:14:37,936 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 99 selfloop transitions, 442 changer transitions 83/624 dead transitions. [2023-08-24 11:14:37,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 624 transitions, 17484 flow [2023-08-24 11:14:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 11:14:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 11:14:37,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2599 transitions. [2023-08-24 11:14:37,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121527777777776 [2023-08-24 11:14:37,939 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2599 transitions. [2023-08-24 11:14:37,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2599 transitions. [2023-08-24 11:14:37,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:37,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2599 transitions. [2023-08-24 11:14:37,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.75555555555555) internal successors, (2599), 45 states have internal predecessors, (2599), 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) [2023-08-24 11:14:37,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 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) [2023-08-24 11:14:37,947 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 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) [2023-08-24 11:14:37,947 INFO L175 Difference]: Start difference. First operand has 512 places, 481 transitions, 12377 flow. Second operand 45 states and 2599 transitions. [2023-08-24 11:14:37,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 624 transitions, 17484 flow [2023-08-24 11:14:39,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 624 transitions, 16467 flow, removed 185 selfloop flow, removed 35 redundant places. [2023-08-24 11:14:40,003 INFO L231 Difference]: Finished difference. Result has 525 places, 491 transitions, 12842 flow [2023-08-24 11:14:40,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=12842, PETRI_PLACES=525, PETRI_TRANSITIONS=491} [2023-08-24 11:14:40,004 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 507 predicate places. [2023-08-24 11:14:40,004 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 491 transitions, 12842 flow [2023-08-24 11:14:40,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:40,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:40,004 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:40,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 11:14:40,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:40,205 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:40,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash 627162112, now seen corresponding path program 21 times [2023-08-24 11:14:40,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:40,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447097659] [2023-08-24 11:14:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:40,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:40,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447097659] [2023-08-24 11:14:40,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447097659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661334371] [2023-08-24 11:14:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 11:14:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:40,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:40,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 11:14:40,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-08-24 11:14:40,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:40,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 11:14:40,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:40,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:40,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661334371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:40,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:40,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2023-08-24 11:14:40,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842250520] [2023-08-24 11:14:40,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:40,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 11:14:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:40,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 11:14:40,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-08-24 11:14:40,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:40,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 491 transitions, 12842 flow. Second operand has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:40,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:40,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:40,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:42,750 INFO L124 PetriNetUnfolderBase]: 1908/3591 cut-off events. [2023-08-24 11:14:42,751 INFO L125 PetriNetUnfolderBase]: For 649382/649382 co-relation queries the response was YES. [2023-08-24 11:14:42,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52545 conditions, 3591 events. 1908/3591 cut-off events. For 649382/649382 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 21160 event pairs, 23 based on Foata normal form. 8/3599 useless extension candidates. Maximal degree in co-relation 52313. Up to 1430 conditions per place. [2023-08-24 11:14:42,807 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 103 selfloop transitions, 450 changer transitions 75/628 dead transitions. [2023-08-24 11:14:42,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 628 transitions, 18286 flow [2023-08-24 11:14:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 11:14:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 11:14:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2539 transitions. [2023-08-24 11:14:42,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45081676136363635 [2023-08-24 11:14:42,810 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2539 transitions. [2023-08-24 11:14:42,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2539 transitions. [2023-08-24 11:14:42,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:42,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2539 transitions. [2023-08-24 11:14:42,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.70454545454545) internal successors, (2539), 44 states have internal predecessors, (2539), 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) [2023-08-24 11:14:42,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 128.0) internal successors, (5760), 45 states have internal predecessors, (5760), 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) [2023-08-24 11:14:42,818 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 128.0) internal successors, (5760), 45 states have internal predecessors, (5760), 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) [2023-08-24 11:14:42,818 INFO L175 Difference]: Start difference. First operand has 525 places, 491 transitions, 12842 flow. Second operand 44 states and 2539 transitions. [2023-08-24 11:14:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 628 transitions, 18286 flow [2023-08-24 11:14:45,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 628 transitions, 17227 flow, removed 177 selfloop flow, removed 39 redundant places. [2023-08-24 11:14:45,487 INFO L231 Difference]: Finished difference. Result has 533 places, 499 transitions, 13397 flow [2023-08-24 11:14:45,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=11861, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13397, PETRI_PLACES=533, PETRI_TRANSITIONS=499} [2023-08-24 11:14:45,488 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 515 predicate places. [2023-08-24 11:14:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 499 transitions, 13397 flow [2023-08-24 11:14:45,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.166666666666664) internal successors, (1300), 24 states have internal predecessors, (1300), 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) [2023-08-24 11:14:45,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:45,489 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:45,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:45,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:45,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:45,695 INFO L85 PathProgramCache]: Analyzing trace with hash 573933476, now seen corresponding path program 22 times [2023-08-24 11:14:45,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103498169] [2023-08-24 11:14:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103498169] [2023-08-24 11:14:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103498169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067022074] [2023-08-24 11:14:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 11:14:46,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:46,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:46,049 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:46,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 11:14:46,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 11:14:46,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:46,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 11:14:46,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:46,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:14:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067022074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:14:46,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:14:46,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 23 [2023-08-24 11:14:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401149869] [2023-08-24 11:14:46,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:14:46,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 11:14:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 11:14:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2023-08-24 11:14:46,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 128 [2023-08-24 11:14:46,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 499 transitions, 13397 flow. Second operand has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:46,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:46,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 128 [2023-08-24 11:14:46,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:48,539 INFO L124 PetriNetUnfolderBase]: 1900/3579 cut-off events. [2023-08-24 11:14:48,539 INFO L125 PetriNetUnfolderBase]: For 693255/693255 co-relation queries the response was YES. [2023-08-24 11:14:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53277 conditions, 3579 events. 1900/3579 cut-off events. For 693255/693255 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 21149 event pairs, 21 based on Foata normal form. 8/3587 useless extension candidates. Maximal degree in co-relation 53041. Up to 1418 conditions per place. [2023-08-24 11:14:48,597 INFO L140 encePairwiseOnDemand]: 123/128 looper letters, 98 selfloop transitions, 453 changer transitions 84/635 dead transitions. [2023-08-24 11:14:48,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 635 transitions, 18495 flow [2023-08-24 11:14:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 11:14:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 11:14:48,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2600 transitions. [2023-08-24 11:14:48,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-08-24 11:14:48,601 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2600 transitions. [2023-08-24 11:14:48,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2600 transitions. [2023-08-24 11:14:48,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:48,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2600 transitions. [2023-08-24 11:14:48,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.77777777777778) internal successors, (2600), 45 states have internal predecessors, (2600), 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) [2023-08-24 11:14:48,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 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) [2023-08-24 11:14:48,609 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 128.0) internal successors, (5888), 46 states have internal predecessors, (5888), 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) [2023-08-24 11:14:48,609 INFO L175 Difference]: Start difference. First operand has 533 places, 499 transitions, 13397 flow. Second operand 45 states and 2600 transitions. [2023-08-24 11:14:48,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 635 transitions, 18495 flow [2023-08-24 11:14:51,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 635 transitions, 17225 flow, removed 240 selfloop flow, removed 40 redundant places. [2023-08-24 11:14:51,097 INFO L231 Difference]: Finished difference. Result has 539 places, 501 transitions, 13307 flow [2023-08-24 11:14:51,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=12169, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13307, PETRI_PLACES=539, PETRI_TRANSITIONS=501} [2023-08-24 11:14:51,098 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 521 predicate places. [2023-08-24 11:14:51,098 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 501 transitions, 13307 flow [2023-08-24 11:14:51,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.2) internal successors, (1355), 25 states have internal predecessors, (1355), 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) [2023-08-24 11:14:51,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:14:51,099 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:14:51,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 11:14:51,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 11:14:51,307 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:14:51,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:14:51,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2032330621, now seen corresponding path program 23 times [2023-08-24 11:14:51,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:14:51,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029547421] [2023-08-24 11:14:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:14:51,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:14:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:14:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:14:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029547421] [2023-08-24 11:14:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029547421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:14:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722396255] [2023-08-24 11:14:51,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 11:14:51,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:14:51,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:14:51,435 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:14:51,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 11:14:51,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-08-24 11:14:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 11:14:51,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 11:14:51,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:14:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:14:51,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 11:14:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722396255] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:14:51,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 11:14:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2023-08-24 11:14:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627420366] [2023-08-24 11:14:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:14:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 11:14:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:14:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 11:14:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-24 11:14:51,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 128 [2023-08-24 11:14:51,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 501 transitions, 13307 flow. Second operand has 13 states, 13 states have (on average 58.23076923076923) internal successors, (757), 13 states have internal predecessors, (757), 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) [2023-08-24 11:14:51,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:14:51,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 128 [2023-08-24 11:14:51,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:14:55,679 INFO L124 PetriNetUnfolderBase]: 7702/12394 cut-off events. [2023-08-24 11:14:55,680 INFO L125 PetriNetUnfolderBase]: For 2345141/2345141 co-relation queries the response was YES. [2023-08-24 11:14:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160948 conditions, 12394 events. 7702/12394 cut-off events. For 2345141/2345141 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 78159 event pairs, 146 based on Foata normal form. 777/13171 useless extension candidates. Maximal degree in co-relation 160711. Up to 4801 conditions per place. [2023-08-24 11:14:55,864 INFO L140 encePairwiseOnDemand]: 125/128 looper letters, 0 selfloop transitions, 0 changer transitions 2567/2567 dead transitions. [2023-08-24 11:14:55,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 2567 transitions, 63155 flow [2023-08-24 11:14:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 11:14:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 11:14:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 825 transitions. [2023-08-24 11:14:55,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957932692307692 [2023-08-24 11:14:55,865 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 825 transitions. [2023-08-24 11:14:55,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 825 transitions. [2023-08-24 11:14:55,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:14:55,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 825 transitions. [2023-08-24 11:14:55,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 63.46153846153846) internal successors, (825), 13 states have internal predecessors, (825), 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) [2023-08-24 11:14:55,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 128.0) internal successors, (1792), 14 states have internal predecessors, (1792), 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) [2023-08-24 11:14:55,868 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 128.0) internal successors, (1792), 14 states have internal predecessors, (1792), 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) [2023-08-24 11:14:55,868 INFO L175 Difference]: Start difference. First operand has 539 places, 501 transitions, 13307 flow. Second operand 13 states and 825 transitions. [2023-08-24 11:14:55,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 2567 transitions, 63155 flow [2023-08-24 11:15:00,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 2567 transitions, 56482 flow, removed 229 selfloop flow, removed 73 redundant places. [2023-08-24 11:15:00,217 INFO L231 Difference]: Finished difference. Result has 477 places, 0 transitions, 0 flow [2023-08-24 11:15:00,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=10533, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=477, PETRI_TRANSITIONS=0} [2023-08-24 11:15:00,218 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 459 predicate places. [2023-08-24 11:15:00,218 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 0 transitions, 0 flow [2023-08-24 11:15:00,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.23076923076923) internal successors, (757), 13 states have internal predecessors, (757), 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) [2023-08-24 11:15:00,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 11:15:00,220 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 11:15:00,221 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 11:15:00,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 11:15:00,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 11:15:00,426 INFO L445 BasicCegarLoop]: Path program histogram: [23, 2, 1] [2023-08-24 11:15:00,428 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 11:15:00,428 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 11:15:00,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 11:15:00 BasicIcfg [2023-08-24 11:15:00,430 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 11:15:00,430 INFO L158 Benchmark]: Toolchain (without parser) took 81022.79ms. Allocated memory was 396.4MB in the beginning and 6.9GB in the end (delta: 6.5GB). Free memory was 371.1MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 396.4MB. Free memory is still 373.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.07ms. Allocated memory is still 396.4MB. Free memory was 371.1MB in the beginning and 351.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.78ms. Allocated memory is still 396.4MB. Free memory was 351.6MB in the beginning and 349.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: Boogie Preprocessor took 31.24ms. Allocated memory is still 396.4MB. Free memory was 349.9MB in the beginning and 348.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: RCFGBuilder took 345.43ms. Allocated memory is still 396.4MB. Free memory was 348.4MB in the beginning and 335.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 11:15:00,431 INFO L158 Benchmark]: TraceAbstraction took 80121.35ms. Allocated memory was 396.4MB in the beginning and 6.9GB in the end (delta: 6.5GB). Free memory was 335.2MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-24 11:15:00,432 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 396.4MB. Free memory is still 373.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 465.07ms. Allocated memory is still 396.4MB. Free memory was 371.1MB in the beginning and 351.6MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.78ms. Allocated memory is still 396.4MB. Free memory was 351.6MB in the beginning and 349.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.24ms. Allocated memory is still 396.4MB. Free memory was 349.9MB in the beginning and 348.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 345.43ms. Allocated memory is still 396.4MB. Free memory was 348.4MB in the beginning and 335.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 80121.35ms. Allocated memory was 396.4MB in the beginning and 6.9GB in the end (delta: 6.5GB). Free memory was 335.2MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 2.1GB. 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 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 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: 80.0s, OverallIterations: 26, TraceHistogramMax: 11, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 59.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8110 SdHoareTripleChecker+Valid, 3.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8110 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 859 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5685 IncrementalHoareTripleChecker+Invalid, 6544 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 859 mSolverCounterUnsat, 0 mSDtfsCounter, 5685 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1941 GetRequests, 618 SyntacticMatches, 274 SemanticMatches, 1049 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16965 ImplicationChecksByTransitivity, 13.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13397occurred in iteration=24, InterpolantAutomatonStates: 735, 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 1060 NumberOfCodeBlocks, 1060 NumberOfCodeBlocksAsserted, 134 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 6273 SizeOfPredicates, 316 NumberOfNonLiveVariables, 4015 ConjunctsInSsa, 455 ConjunctsInUnsatCore, 67 InterpolantComputations, 6 PerfectInterpolantSequences, 202/4163 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 11:15:00,451 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...