/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:24:15,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:24:16,029 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 02:24:16,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:24:16,034 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:24:16,064 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:24:16,065 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:24:16,065 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:24:16,066 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:24:16,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:24:16,070 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:24:16,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:24:16,070 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:24:16,072 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:24:16,072 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:24:16,072 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:24:16,072 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:24:16,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:24:16,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:24:16,073 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:24:16,073 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:24:16,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:24:16,074 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:24:16,074 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:24:16,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:24:16,075 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:24:16,075 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:24:16,075 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:24:16,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:24:16,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:24:16,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:24:16,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:24:16,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:24:16,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:24:16,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:24:16,078 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:24:16,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:24:16,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:24:16,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:24:16,447 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:24:16,448 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:24:16,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-24 02:24:17,726 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:24:17,933 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:24:17,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-24 02:24:17,939 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eb8490e1/305c43a147ba45bfa985e1afba588610/FLAGc6b4bf9ac [2023-08-24 02:24:17,951 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eb8490e1/305c43a147ba45bfa985e1afba588610 [2023-08-24 02:24:17,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:24:17,954 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:24:17,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:24:17,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:24:17,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:24:17,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:24:17" (1/1) ... [2023-08-24 02:24:17,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60b2e95d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:17, skipping insertion in model container [2023-08-24 02:24:17,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:24:17" (1/1) ... [2023-08-24 02:24:17,975 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:24:18,112 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-24 02:24:18,113 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:24:18,121 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:24:18,148 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2023-08-24 02:24:18,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:24:18,162 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:24:18,162 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:24:18,168 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:24:18,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18 WrapperNode [2023-08-24 02:24:18,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:24:18,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:24:18,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:24:18,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:24:18,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,206 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-08-24 02:24:18,207 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:24:18,208 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:24:18,208 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:24:18,208 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:24:18,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,216 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,226 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,237 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,238 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,247 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:24:18,248 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:24:18,248 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:24:18,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:24:18,249 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (1/1) ... [2023-08-24 02:24:18,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:24:18,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:18,286 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 02:24:18,314 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 02:24:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:24:18,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:24:18,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:24:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:24:18,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:24:18,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:24:18,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:24:18,329 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 02:24:18,436 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:24:18,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:24:18,570 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:24:18,601 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:24:18,602 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 02:24:18,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:24:18 BoogieIcfgContainer [2023-08-24 02:24:18,604 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:24:18,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:24:18,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:24:18,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:24:18,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:24:17" (1/3) ... [2023-08-24 02:24:18,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af9dd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:24:18, skipping insertion in model container [2023-08-24 02:24:18,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:24:18" (2/3) ... [2023-08-24 02:24:18,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af9dd79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:24:18, skipping insertion in model container [2023-08-24 02:24:18,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:24:18" (3/3) ... [2023-08-24 02:24:18,611 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-24 02:24:18,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:24:18,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:24:18,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:24:18,688 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 02:24:18,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2023-08-24 02:24:18,759 INFO L124 PetriNetUnfolderBase]: 6/84 cut-off events. [2023-08-24 02:24:18,759 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:24:18,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 02:24:18,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2023-08-24 02:24:18,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2023-08-24 02:24:18,771 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:24:18,780 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2023-08-24 02:24:18,783 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2023-08-24 02:24:18,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2023-08-24 02:24:18,807 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-08-24 02:24:18,807 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:24:18,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 02:24:18,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 02:24:20,926 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-08-24 02:24:20,926 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-24 02:24:20,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:24:20,945 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;@443132bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:24:20,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 02:24:20,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:24:20,950 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 02:24:20,950 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:24:20,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:20,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:20,952 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 02:24:20,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1553731203, now seen corresponding path program 1 times [2023-08-24 02:24:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:20,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465075968] [2023-08-24 02:24:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:20,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:21,668 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 02:24:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465075968] [2023-08-24 02:24:21,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465075968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:21,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:21,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603399352] [2023-08-24 02:24:21,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:21,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:21,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:21,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:21,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:21,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:21,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:21,883 INFO L124 PetriNetUnfolderBase]: 76/144 cut-off events. [2023-08-24 02:24:21,883 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-24 02:24:21,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 144 events. 76/144 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 414 event pairs, 6 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 232. Up to 81 conditions per place. [2023-08-24 02:24:21,887 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 9 changer transitions 5/47 dead transitions. [2023-08-24 02:24:21,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 221 flow [2023-08-24 02:24:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:24:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:24:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2023-08-24 02:24:21,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39783001808318263 [2023-08-24 02:24:21,910 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 440 transitions. [2023-08-24 02:24:21,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 440 transitions. [2023-08-24 02:24:21,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:21,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 440 transitions. [2023-08-24 02:24:21,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 states have internal predecessors, (440), 0 states have call successors, (0), 0 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 02:24:21,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:21,929 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:21,931 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 440 transitions. [2023-08-24 02:24:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 221 flow [2023-08-24 02:24:21,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 02:24:21,936 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 94 flow [2023-08-24 02:24:21,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, 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=7, PETRI_FLOW=94, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 02:24:21,941 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 02:24:21,941 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 94 flow [2023-08-24 02:24:21,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:21,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:21,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:21,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:24:21,943 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 02:24:21,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:21,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1871234245, now seen corresponding path program 2 times [2023-08-24 02:24:21,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:21,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638950374] [2023-08-24 02:24:21,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:21,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:22,245 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 02:24:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:22,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638950374] [2023-08-24 02:24:22,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638950374] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:22,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:22,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26016706] [2023-08-24 02:24:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:22,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:22,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:22,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:22,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:22,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:22,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:22,407 INFO L124 PetriNetUnfolderBase]: 81/153 cut-off events. [2023-08-24 02:24:22,407 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-24 02:24:22,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 153 events. 81/153 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 464 event pairs, 2 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 453. Up to 85 conditions per place. [2023-08-24 02:24:22,412 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 34 selfloop transitions, 14 changer transitions 5/53 dead transitions. [2023-08-24 02:24:22,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 303 flow [2023-08-24 02:24:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:24:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:24:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 498 transitions. [2023-08-24 02:24:22,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939873417721519 [2023-08-24 02:24:22,416 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 498 transitions. [2023-08-24 02:24:22,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 498 transitions. [2023-08-24 02:24:22,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:22,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 498 transitions. [2023-08-24 02:24:22,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.25) internal successors, (498), 8 states have internal predecessors, (498), 0 states have call successors, (0), 0 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 02:24:22,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 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 02:24:22,421 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 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 02:24:22,421 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 94 flow. Second operand 8 states and 498 transitions. [2023-08-24 02:24:22,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 303 flow [2023-08-24 02:24:22,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 289 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 02:24:22,425 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 171 flow [2023-08-24 02:24:22,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=171, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-24 02:24:22,426 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-24 02:24:22,426 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 171 flow [2023-08-24 02:24:22,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:22,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:22,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:22,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:24:22,430 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 02:24:22,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1091143127, now seen corresponding path program 3 times [2023-08-24 02:24:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:22,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423491795] [2023-08-24 02:24:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:22,669 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 02:24:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423491795] [2023-08-24 02:24:22,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423491795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:22,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:22,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:22,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684547083] [2023-08-24 02:24:22,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:22,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:22,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:22,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:22,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:22,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:22,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:22,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:22,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:22,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:22,784 INFO L124 PetriNetUnfolderBase]: 87/163 cut-off events. [2023-08-24 02:24:22,784 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-08-24 02:24:22,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 163 events. 87/163 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 474 event pairs, 18 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 604. Up to 91 conditions per place. [2023-08-24 02:24:22,788 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 30 selfloop transitions, 18 changer transitions 5/53 dead transitions. [2023-08-24 02:24:22,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 375 flow [2023-08-24 02:24:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:24:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:24:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-08-24 02:24:22,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969258589511754 [2023-08-24 02:24:22,791 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-08-24 02:24:22,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-08-24 02:24:22,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:22,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-08-24 02:24:22,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 02:24:22,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:22,795 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:22,795 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 171 flow. Second operand 7 states and 439 transitions. [2023-08-24 02:24:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 375 flow [2023-08-24 02:24:22,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 349 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 02:24:22,801 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 257 flow [2023-08-24 02:24:22,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-24 02:24:22,802 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-08-24 02:24:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 257 flow [2023-08-24 02:24:22,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:22,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:22,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:22,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 02:24:22,806 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 02:24:22,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:22,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1384482575, now seen corresponding path program 4 times [2023-08-24 02:24:22,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:22,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142139966] [2023-08-24 02:24:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:22,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142139966] [2023-08-24 02:24:22,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142139966] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:22,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123871116] [2023-08-24 02:24:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:22,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:22,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:23,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:23,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:23,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:23,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:23,106 INFO L124 PetriNetUnfolderBase]: 101/191 cut-off events. [2023-08-24 02:24:23,107 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-08-24 02:24:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 191 events. 101/191 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 14 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 731. Up to 99 conditions per place. [2023-08-24 02:24:23,109 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 24 changer transitions 5/62 dead transitions. [2023-08-24 02:24:23,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 490 flow [2023-08-24 02:24:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:24:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:24:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-08-24 02:24:23,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969258589511754 [2023-08-24 02:24:23,110 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-08-24 02:24:23,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-08-24 02:24:23,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:23,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-08-24 02:24:23,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 02:24:23,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,114 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 257 flow. Second operand 7 states and 439 transitions. [2023-08-24 02:24:23,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 490 flow [2023-08-24 02:24:23,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 463 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 02:24:23,118 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 361 flow [2023-08-24 02:24:23,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-24 02:24:23,119 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-24 02:24:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 361 flow [2023-08-24 02:24:23,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:23,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:23,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 02:24:23,120 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 02:24:23,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1307168305, now seen corresponding path program 5 times [2023-08-24 02:24:23,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:23,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913237586] [2023-08-24 02:24:23,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:23,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:23,311 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 02:24:23,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:23,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913237586] [2023-08-24 02:24:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913237586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:23,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092546750] [2023-08-24 02:24:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:23,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:23,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:23,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:23,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:23,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:23,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:23,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:23,445 INFO L124 PetriNetUnfolderBase]: 112/216 cut-off events. [2023-08-24 02:24:23,446 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2023-08-24 02:24:23,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 216 events. 112/216 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 18 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 916. Up to 103 conditions per place. [2023-08-24 02:24:23,448 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 35 selfloop transitions, 26 changer transitions 5/66 dead transitions. [2023-08-24 02:24:23,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 573 flow [2023-08-24 02:24:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:24:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:24:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2023-08-24 02:24:23,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987341772151899 [2023-08-24 02:24:23,450 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2023-08-24 02:24:23,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2023-08-24 02:24:23,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:23,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2023-08-24 02:24:23,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 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 02:24:23,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,456 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 361 flow. Second operand 7 states and 441 transitions. [2023-08-24 02:24:23,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 573 flow [2023-08-24 02:24:23,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 559 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 02:24:23,461 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 435 flow [2023-08-24 02:24:23,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=435, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-24 02:24:23,463 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-24 02:24:23,463 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 435 flow [2023-08-24 02:24:23,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:23,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:23,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 02:24:23,464 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 02:24:23,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1118848757, now seen corresponding path program 6 times [2023-08-24 02:24:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906047734] [2023-08-24 02:24:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:23,701 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 02:24:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:23,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906047734] [2023-08-24 02:24:23,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906047734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:24:23,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:24:23,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:24:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718174327] [2023-08-24 02:24:23,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:24:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:24:23,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:24:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:24:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:23,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 435 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:23,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:23,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:23,858 INFO L124 PetriNetUnfolderBase]: 131/247 cut-off events. [2023-08-24 02:24:23,859 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2023-08-24 02:24:23,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 247 events. 131/247 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 868 event pairs, 40 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 1118. Up to 111 conditions per place. [2023-08-24 02:24:23,861 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 36 selfloop transitions, 27 changer transitions 5/68 dead transitions. [2023-08-24 02:24:23,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 653 flow [2023-08-24 02:24:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:24:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:24:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 443 transitions. [2023-08-24 02:24:23,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054249547920434 [2023-08-24 02:24:23,863 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 443 transitions. [2023-08-24 02:24:23,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 443 transitions. [2023-08-24 02:24:23,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:23,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 443 transitions. [2023-08-24 02:24:23,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 02:24:23,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,867 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 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 02:24:23,867 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 435 flow. Second operand 7 states and 443 transitions. [2023-08-24 02:24:23,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 653 flow [2023-08-24 02:24:23,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 02:24:23,871 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 486 flow [2023-08-24 02:24:23,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-08-24 02:24:23,872 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-08-24 02:24:23,872 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 486 flow [2023-08-24 02:24:23,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 02:24:23,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:23,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:23,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 02:24:23,873 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 02:24:23,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:23,874 INFO L85 PathProgramCache]: Analyzing trace with hash -898108289, now seen corresponding path program 1 times [2023-08-24 02:24:23,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:23,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901566890] [2023-08-24 02:24:23,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:24,038 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 02:24:24,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901566890] [2023-08-24 02:24:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901566890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753144738] [2023-08-24 02:24:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:24,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:24,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:24,045 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 02:24:24,076 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 02:24:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:24,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:24,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:24,348 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 02:24:24,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:24,542 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 02:24:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753144738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:24,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751514401] [2023-08-24 02:24:24,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:24,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:24,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:24,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:24,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 486 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:24,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:24,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:24,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:25,034 INFO L124 PetriNetUnfolderBase]: 146/311 cut-off events. [2023-08-24 02:24:25,034 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-24 02:24:25,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 311 events. 146/311 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1353 event pairs, 10 based on Foata normal form. 30/341 useless extension candidates. Maximal degree in co-relation 1251. Up to 81 conditions per place. [2023-08-24 02:24:25,037 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 72 selfloop transitions, 26 changer transitions 22/120 dead transitions. [2023-08-24 02:24:25,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 889 flow [2023-08-24 02:24:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:24:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:24:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1124 transitions. [2023-08-24 02:24:25,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952180028129395 [2023-08-24 02:24:25,041 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1124 transitions. [2023-08-24 02:24:25,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1124 transitions. [2023-08-24 02:24:25,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:25,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1124 transitions. [2023-08-24 02:24:25,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 62.44444444444444) internal successors, (1124), 18 states have internal predecessors, (1124), 0 states have call successors, (0), 0 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 02:24:25,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 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 02:24:25,049 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 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 02:24:25,049 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 486 flow. Second operand 18 states and 1124 transitions. [2023-08-24 02:24:25,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 889 flow [2023-08-24 02:24:25,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 782 flow, removed 17 selfloop flow, removed 11 redundant places. [2023-08-24 02:24:25,054 INFO L231 Difference]: Finished difference. Result has 71 places, 44 transitions, 403 flow [2023-08-24 02:24:25,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=403, PETRI_PLACES=71, PETRI_TRANSITIONS=44} [2023-08-24 02:24:25,055 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-08-24 02:24:25,055 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 44 transitions, 403 flow [2023-08-24 02:24:25,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:25,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:25,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:25,069 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 02:24:25,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:25,262 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 02:24:25,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:25,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1946707435, now seen corresponding path program 2 times [2023-08-24 02:24:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:25,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077756483] [2023-08-24 02:24:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:25,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:25,430 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 02:24:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:25,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077756483] [2023-08-24 02:24:25,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077756483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:25,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797832607] [2023-08-24 02:24:25,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:24:25,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:25,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:25,432 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 02:24:25,458 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 02:24:25,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:24:25,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:25,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:25,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:25,661 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 02:24:25,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:25,879 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 02:24:25,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797832607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:25,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:25,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:25,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582364297] [2023-08-24 02:24:25,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:25,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:25,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:25,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:25,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 44 transitions, 403 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:25,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:25,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:25,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:26,392 INFO L124 PetriNetUnfolderBase]: 162/337 cut-off events. [2023-08-24 02:24:26,392 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2023-08-24 02:24:26,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 337 events. 162/337 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1451 event pairs, 18 based on Foata normal form. 2/339 useless extension candidates. Maximal degree in co-relation 1577. Up to 125 conditions per place. [2023-08-24 02:24:26,396 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 69 selfloop transitions, 40 changer transitions 10/119 dead transitions. [2023-08-24 02:24:26,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 994 flow [2023-08-24 02:24:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:24:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:24:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1173 transitions. [2023-08-24 02:24:26,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39073950699533644 [2023-08-24 02:24:26,400 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1173 transitions. [2023-08-24 02:24:26,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1173 transitions. [2023-08-24 02:24:26,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:26,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1173 transitions. [2023-08-24 02:24:26,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 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 02:24:26,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:26,407 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:26,407 INFO L175 Difference]: Start difference. First operand has 71 places, 44 transitions, 403 flow. Second operand 19 states and 1173 transitions. [2023-08-24 02:24:26,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 994 flow [2023-08-24 02:24:26,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 821 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-08-24 02:24:26,414 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 504 flow [2023-08-24 02:24:26,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=504, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2023-08-24 02:24:26,415 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-08-24 02:24:26,415 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 504 flow [2023-08-24 02:24:26,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:26,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:26,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:26,424 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 02:24:26,621 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,SelfDestructingSolverStorable7 [2023-08-24 02:24:26,621 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 02:24:26,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1871172835, now seen corresponding path program 3 times [2023-08-24 02:24:26,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128706322] [2023-08-24 02:24:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:26,876 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 02:24:26,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:26,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128706322] [2023-08-24 02:24:26,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128706322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:26,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668166209] [2023-08-24 02:24:26,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:24:26,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:26,878 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 02:24:26,901 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 02:24:26,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:24:26,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:26,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:26,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:27,118 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 02:24:27,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:27,280 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 02:24:27,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668166209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:27,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:27,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 02:24:27,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542054727] [2023-08-24 02:24:27,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:27,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:24:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:24:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:24:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:27,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 504 flow. Second operand has 20 states, 20 states have (on average 53.0) internal successors, (1060), 20 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 02:24:27,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:27,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:27,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:27,860 INFO L124 PetriNetUnfolderBase]: 163/338 cut-off events. [2023-08-24 02:24:27,861 INFO L125 PetriNetUnfolderBase]: For 1307/1307 co-relation queries the response was YES. [2023-08-24 02:24:27,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 338 events. 163/338 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1455 event pairs, 14 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 1562. Up to 123 conditions per place. [2023-08-24 02:24:27,864 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 73 selfloop transitions, 38 changer transitions 10/121 dead transitions. [2023-08-24 02:24:27,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 982 flow [2023-08-24 02:24:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:24:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:24:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1080 transitions. [2023-08-24 02:24:27,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597601598934044 [2023-08-24 02:24:27,868 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1080 transitions. [2023-08-24 02:24:27,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1080 transitions. [2023-08-24 02:24:27,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:27,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1080 transitions. [2023-08-24 02:24:27,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 02:24:27,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:27,875 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:27,875 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 504 flow. Second operand 19 states and 1080 transitions. [2023-08-24 02:24:27,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 982 flow [2023-08-24 02:24:27,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 885 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-08-24 02:24:27,883 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 503 flow [2023-08-24 02:24:27,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=503, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-08-24 02:24:27,884 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-08-24 02:24:27,884 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 503 flow [2023-08-24 02:24:27,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.0) internal successors, (1060), 20 states have internal predecessors, (1060), 0 states have call successors, (0), 0 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 02:24:27,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:27,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:27,895 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 02:24:28,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:28,091 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 02:24:28,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2071749471, now seen corresponding path program 4 times [2023-08-24 02:24:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:28,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555861412] [2023-08-24 02:24:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:28,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:28,273 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 02:24:28,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:28,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555861412] [2023-08-24 02:24:28,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555861412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:28,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849718256] [2023-08-24 02:24:28,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:24:28,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:28,277 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 02:24:28,303 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 02:24:28,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:24:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:28,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:28,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:28,517 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 02:24:28,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:28,727 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 02:24:28,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849718256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:28,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180888509] [2023-08-24 02:24:28,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:28,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:28,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 503 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:28,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:28,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:28,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:29,403 INFO L124 PetriNetUnfolderBase]: 209/447 cut-off events. [2023-08-24 02:24:29,403 INFO L125 PetriNetUnfolderBase]: For 1842/1842 co-relation queries the response was YES. [2023-08-24 02:24:29,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 447 events. 209/447 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2157 event pairs, 30 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 2126. Up to 288 conditions per place. [2023-08-24 02:24:29,407 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 82 selfloop transitions, 44 changer transitions 15/141 dead transitions. [2023-08-24 02:24:29,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 141 transitions, 1227 flow [2023-08-24 02:24:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:24:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:24:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1285 transitions. [2023-08-24 02:24:29,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872814948764316 [2023-08-24 02:24:29,410 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1285 transitions. [2023-08-24 02:24:29,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1285 transitions. [2023-08-24 02:24:29,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:29,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1285 transitions. [2023-08-24 02:24:29,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.19047619047619) internal successors, (1285), 21 states have internal predecessors, (1285), 0 states have call successors, (0), 0 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 02:24:29,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:29,418 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:29,418 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 503 flow. Second operand 21 states and 1285 transitions. [2023-08-24 02:24:29,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 141 transitions, 1227 flow [2023-08-24 02:24:29,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 141 transitions, 1083 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-08-24 02:24:29,426 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 757 flow [2023-08-24 02:24:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=757, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2023-08-24 02:24:29,427 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-24 02:24:29,427 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 757 flow [2023-08-24 02:24:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:29,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:29,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:29,434 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 02:24:29,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:29,633 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 02:24:29,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -352811119, now seen corresponding path program 5 times [2023-08-24 02:24:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:29,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825377537] [2023-08-24 02:24:29,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:29,776 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 02:24:29,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:29,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825377537] [2023-08-24 02:24:29,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825377537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:29,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112757820] [2023-08-24 02:24:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:24:29,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:29,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:29,778 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 02:24:29,796 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 02:24:29,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:24:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:29,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:29,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:30,012 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 02:24:30,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:30,218 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 02:24:30,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112757820] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:30,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529798951] [2023-08-24 02:24:30,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:30,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:30,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 757 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:30,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:30,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:30,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:30,470 INFO L124 PetriNetUnfolderBase]: 209/440 cut-off events. [2023-08-24 02:24:30,471 INFO L125 PetriNetUnfolderBase]: For 1635/1635 co-relation queries the response was YES. [2023-08-24 02:24:30,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 440 events. 209/440 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2091 event pairs, 36 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2093. Up to 355 conditions per place. [2023-08-24 02:24:30,474 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 69 selfloop transitions, 30 changer transitions 10/109 dead transitions. [2023-08-24 02:24:30,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 109 transitions, 1057 flow [2023-08-24 02:24:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 02:24:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 02:24:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 790 transitions. [2023-08-24 02:24:30,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-08-24 02:24:30,477 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 790 transitions. [2023-08-24 02:24:30,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 790 transitions. [2023-08-24 02:24:30,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:30,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 790 transitions. [2023-08-24 02:24:30,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.76923076923077) internal successors, (790), 13 states have internal predecessors, (790), 0 states have call successors, (0), 0 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 02:24:30,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 02:24:30,484 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 02:24:30,484 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 757 flow. Second operand 13 states and 790 transitions. [2023-08-24 02:24:30,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 109 transitions, 1057 flow [2023-08-24 02:24:30,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 950 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-08-24 02:24:30,494 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 735 flow [2023-08-24 02:24:30,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=735, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2023-08-24 02:24:30,495 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 02:24:30,495 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 735 flow [2023-08-24 02:24:30,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:30,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:30,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:30,505 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 02:24:30,701 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,SelfDestructingSolverStorable10 [2023-08-24 02:24:30,701 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 02:24:30,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:30,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2145929061, now seen corresponding path program 6 times [2023-08-24 02:24:30,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:30,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941115755] [2023-08-24 02:24:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:30,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:30,873 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 02:24:30,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941115755] [2023-08-24 02:24:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941115755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223267568] [2023-08-24 02:24:30,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:24:30,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:30,876 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 02:24:30,877 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 02:24:30,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:24:30,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:30,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:30,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:31,151 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 02:24:31,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:31,362 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 02:24:31,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223267568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:31,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299629120] [2023-08-24 02:24:31,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:31,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:31,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 735 flow. Second operand has 19 states, 19 states have (on average 58.05263157894737) internal successors, (1103), 19 states have internal predecessors, (1103), 0 states have call successors, (0), 0 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 02:24:31,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:31,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:31,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:32,023 INFO L124 PetriNetUnfolderBase]: 209/436 cut-off events. [2023-08-24 02:24:32,023 INFO L125 PetriNetUnfolderBase]: For 1243/1243 co-relation queries the response was YES. [2023-08-24 02:24:32,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2031 conditions, 436 events. 209/436 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2073 event pairs, 30 based on Foata normal form. 4/436 useless extension candidates. Maximal degree in co-relation 2000. Up to 289 conditions per place. [2023-08-24 02:24:32,026 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 63 selfloop transitions, 39 changer transitions 32/134 dead transitions. [2023-08-24 02:24:32,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 1159 flow [2023-08-24 02:24:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:24:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:24:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1276 transitions. [2023-08-24 02:24:32,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845690174804099 [2023-08-24 02:24:32,029 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1276 transitions. [2023-08-24 02:24:32,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1276 transitions. [2023-08-24 02:24:32,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:32,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1276 transitions. [2023-08-24 02:24:32,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.76190476190476) internal successors, (1276), 21 states have internal predecessors, (1276), 0 states have call successors, (0), 0 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 02:24:32,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:32,036 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:32,037 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 735 flow. Second operand 21 states and 1276 transitions. [2023-08-24 02:24:32,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 1159 flow [2023-08-24 02:24:32,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1084 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-24 02:24:32,051 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 772 flow [2023-08-24 02:24:32,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=772, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2023-08-24 02:24:32,053 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-08-24 02:24:32,053 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 772 flow [2023-08-24 02:24:32,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.05263157894737) internal successors, (1103), 19 states have internal predecessors, (1103), 0 states have call successors, (0), 0 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 02:24:32,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:32,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:32,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 02:24:32,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:32,259 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 02:24:32,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1166641207, now seen corresponding path program 7 times [2023-08-24 02:24:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:32,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531100510] [2023-08-24 02:24:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:32,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:32,414 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 02:24:32,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531100510] [2023-08-24 02:24:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531100510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407489547] [2023-08-24 02:24:32,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:24:32,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:32,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:32,416 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 02:24:32,418 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 02:24:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:32,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:32,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:32,640 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 02:24:32,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:32,828 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 02:24:32,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407489547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:32,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:32,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143994385] [2023-08-24 02:24:32,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:32,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:32,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:32,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 772 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:32,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:32,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:32,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:33,046 INFO L124 PetriNetUnfolderBase]: 196/405 cut-off events. [2023-08-24 02:24:33,046 INFO L125 PetriNetUnfolderBase]: For 1556/1556 co-relation queries the response was YES. [2023-08-24 02:24:33,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 405 events. 196/405 cut-off events. For 1556/1556 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1824 event pairs, 31 based on Foata normal form. 2/403 useless extension candidates. Maximal degree in co-relation 2017. Up to 355 conditions per place. [2023-08-24 02:24:33,049 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 77 selfloop transitions, 15 changer transitions 10/102 dead transitions. [2023-08-24 02:24:33,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 1055 flow [2023-08-24 02:24:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:24:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:24:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 605 transitions. [2023-08-24 02:24:33,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829113924050633 [2023-08-24 02:24:33,051 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 605 transitions. [2023-08-24 02:24:33,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 605 transitions. [2023-08-24 02:24:33,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:33,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 605 transitions. [2023-08-24 02:24:33,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.5) internal successors, (605), 10 states have internal predecessors, (605), 0 states have call successors, (0), 0 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 02:24:33,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 02:24:33,055 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 02:24:33,055 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 772 flow. Second operand 10 states and 605 transitions. [2023-08-24 02:24:33,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 1055 flow [2023-08-24 02:24:33,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 965 flow, removed 12 selfloop flow, removed 19 redundant places. [2023-08-24 02:24:33,063 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 747 flow [2023-08-24 02:24:33,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=747, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2023-08-24 02:24:33,064 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-24 02:24:33,064 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 747 flow [2023-08-24 02:24:33,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 02:24:33,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:33,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:33,072 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 02:24:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:33,270 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 02:24:33,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:33,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1825010711, now seen corresponding path program 8 times [2023-08-24 02:24:33,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:33,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611172635] [2023-08-24 02:24:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:33,494 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 02:24:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:33,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611172635] [2023-08-24 02:24:33,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611172635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:33,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722128595] [2023-08-24 02:24:33,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:24:33,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:33,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:33,496 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 02:24:33,498 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 02:24:33,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:24:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:33,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:33,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:33,725 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 02:24:33,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:33,911 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 02:24:33,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722128595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:33,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:33,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 02:24:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251540108] [2023-08-24 02:24:33,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:24:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:33,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:24:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:24:33,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:33,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 747 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 02:24:33,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:33,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:34,653 INFO L124 PetriNetUnfolderBase]: 209/471 cut-off events. [2023-08-24 02:24:34,654 INFO L125 PetriNetUnfolderBase]: For 1554/1554 co-relation queries the response was YES. [2023-08-24 02:24:34,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 471 events. 209/471 cut-off events. For 1554/1554 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2430 event pairs, 31 based on Foata normal form. 3/468 useless extension candidates. Maximal degree in co-relation 2192. Up to 322 conditions per place. [2023-08-24 02:24:34,658 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 108 selfloop transitions, 32 changer transitions 15/155 dead transitions. [2023-08-24 02:24:34,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 155 transitions, 1398 flow [2023-08-24 02:24:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:24:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:24:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1173 transitions. [2023-08-24 02:24:34,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535262206148282 [2023-08-24 02:24:34,662 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1173 transitions. [2023-08-24 02:24:34,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1173 transitions. [2023-08-24 02:24:34,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:34,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1173 transitions. [2023-08-24 02:24:34,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.857142857142854) internal successors, (1173), 21 states have internal predecessors, (1173), 0 states have call successors, (0), 0 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 02:24:34,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:34,669 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:34,669 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 747 flow. Second operand 21 states and 1173 transitions. [2023-08-24 02:24:34,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 155 transitions, 1398 flow [2023-08-24 02:24:34,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1358 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-24 02:24:34,682 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 936 flow [2023-08-24 02:24:34,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=936, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-08-24 02:24:34,683 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 02:24:34,683 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 936 flow [2023-08-24 02:24:34,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 02:24:34,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:34,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:34,704 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 02:24:34,904 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,SelfDestructingSolverStorable13 [2023-08-24 02:24:34,905 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 02:24:34,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1749476111, now seen corresponding path program 9 times [2023-08-24 02:24:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:34,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345395815] [2023-08-24 02:24:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:35,064 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 02:24:35,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:35,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345395815] [2023-08-24 02:24:35,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345395815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:35,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875685496] [2023-08-24 02:24:35,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:24:35,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:35,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:35,067 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 02:24:35,069 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 02:24:35,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:24:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:35,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:35,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:35,306 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 02:24:35,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:35,520 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 02:24:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875685496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:35,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:35,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 02:24:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385954411] [2023-08-24 02:24:35,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:35,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:35,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 936 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 02:24:35,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:35,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:35,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:36,108 INFO L124 PetriNetUnfolderBase]: 206/449 cut-off events. [2023-08-24 02:24:36,109 INFO L125 PetriNetUnfolderBase]: For 1894/1894 co-relation queries the response was YES. [2023-08-24 02:24:36,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 449 events. 206/449 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2236 event pairs, 31 based on Foata normal form. 4/449 useless extension candidates. Maximal degree in co-relation 2248. Up to 322 conditions per place. [2023-08-24 02:24:36,112 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 81 selfloop transitions, 30 changer transitions 25/136 dead transitions. [2023-08-24 02:24:36,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 136 transitions, 1357 flow [2023-08-24 02:24:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:24:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:24:36,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1145 transitions. [2023-08-24 02:24:36,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814123917388408 [2023-08-24 02:24:36,115 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1145 transitions. [2023-08-24 02:24:36,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1145 transitions. [2023-08-24 02:24:36,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:36,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1145 transitions. [2023-08-24 02:24:36,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 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 02:24:36,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:36,121 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:24:36,121 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 936 flow. Second operand 19 states and 1145 transitions. [2023-08-24 02:24:36,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 136 transitions, 1357 flow [2023-08-24 02:24:36,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 136 transitions, 1242 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-08-24 02:24:36,132 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 935 flow [2023-08-24 02:24:36,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=935, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2023-08-24 02:24:36,133 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-08-24 02:24:36,133 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 935 flow [2023-08-24 02:24:36,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 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 02:24:36,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:36,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:36,139 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 02:24:36,339 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,SelfDestructingSolverStorable14 [2023-08-24 02:24:36,339 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 02:24:36,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -751018233, now seen corresponding path program 10 times [2023-08-24 02:24:36,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:36,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643420448] [2023-08-24 02:24:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:36,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:36,540 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 02:24:36,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643420448] [2023-08-24 02:24:36,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643420448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:36,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524595461] [2023-08-24 02:24:36,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:24:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:36,544 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 02:24:36,545 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 02:24:36,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:24:36,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:36,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:36,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:36,770 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 02:24:36,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:36,956 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 02:24:36,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524595461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:36,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:36,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 02:24:36,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807846659] [2023-08-24 02:24:36,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:36,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:24:36,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:36,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:24:36,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:24:36,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:36,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 935 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 02:24:36,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:36,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:36,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:37,348 INFO L124 PetriNetUnfolderBase]: 189/397 cut-off events. [2023-08-24 02:24:37,348 INFO L125 PetriNetUnfolderBase]: For 1743/1743 co-relation queries the response was YES. [2023-08-24 02:24:37,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 397 events. 189/397 cut-off events. For 1743/1743 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1819 event pairs, 31 based on Foata normal form. 3/396 useless extension candidates. Maximal degree in co-relation 2056. Up to 332 conditions per place. [2023-08-24 02:24:37,352 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 84 selfloop transitions, 21 changer transitions 11/116 dead transitions. [2023-08-24 02:24:37,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 116 transitions, 1258 flow [2023-08-24 02:24:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:24:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:24:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 770 transitions. [2023-08-24 02:24:37,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34810126582278483 [2023-08-24 02:24:37,354 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 770 transitions. [2023-08-24 02:24:37,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 770 transitions. [2023-08-24 02:24:37,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:37,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 770 transitions. [2023-08-24 02:24:37,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.0) internal successors, (770), 14 states have internal predecessors, (770), 0 states have call successors, (0), 0 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 02:24:37,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:24:37,358 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:24:37,358 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 935 flow. Second operand 14 states and 770 transitions. [2023-08-24 02:24:37,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 116 transitions, 1258 flow [2023-08-24 02:24:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 116 transitions, 1161 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 02:24:37,370 INFO L231 Difference]: Finished difference. Result has 114 places, 93 transitions, 893 flow [2023-08-24 02:24:37,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2023-08-24 02:24:37,370 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-08-24 02:24:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 893 flow [2023-08-24 02:24:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 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 02:24:37,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:37,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:37,385 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 02:24:37,577 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,SelfDestructingSolverStorable15 [2023-08-24 02:24:37,577 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 02:24:37,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:37,577 INFO L85 PathProgramCache]: Analyzing trace with hash 787817725, now seen corresponding path program 1 times [2023-08-24 02:24:37,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:37,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827185236] [2023-08-24 02:24:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:37,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:37,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:37,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827185236] [2023-08-24 02:24:37,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827185236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527011191] [2023-08-24 02:24:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:37,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:37,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:37,729 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 02:24:37,760 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 02:24:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:37,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:37,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:37,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527011191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:38,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:38,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 02:24:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961776795] [2023-08-24 02:24:38,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:24:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:24:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:24:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:38,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 893 flow. Second operand has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 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 02:24:38,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:38,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:38,437 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-08-24 02:24:38,437 INFO L125 PetriNetUnfolderBase]: For 1684/1684 co-relation queries the response was YES. [2023-08-24 02:24:38,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2260 conditions, 449 events. 221/449 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2088 event pairs, 20 based on Foata normal form. 3/448 useless extension candidates. Maximal degree in co-relation 2219. Up to 113 conditions per place. [2023-08-24 02:24:38,441 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 77 selfloop transitions, 47 changer transitions 30/154 dead transitions. [2023-08-24 02:24:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 1463 flow [2023-08-24 02:24:38,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:24:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:24:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 874 transitions. [2023-08-24 02:24:38,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39511754068716093 [2023-08-24 02:24:38,442 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 874 transitions. [2023-08-24 02:24:38,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 874 transitions. [2023-08-24 02:24:38,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:38,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 874 transitions. [2023-08-24 02:24:38,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 62.42857142857143) internal successors, (874), 14 states have internal predecessors, (874), 0 states have call successors, (0), 0 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 02:24:38,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:24:38,446 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:24:38,446 INFO L175 Difference]: Start difference. First operand has 114 places, 93 transitions, 893 flow. Second operand 14 states and 874 transitions. [2023-08-24 02:24:38,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 1463 flow [2023-08-24 02:24:38,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1403 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-24 02:24:38,457 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 965 flow [2023-08-24 02:24:38,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=965, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2023-08-24 02:24:38,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-08-24 02:24:38,458 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 965 flow [2023-08-24 02:24:38,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 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 02:24:38,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:38,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:38,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 02:24:38,663 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,SelfDestructingSolverStorable16 [2023-08-24 02:24:38,664 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 02:24:38,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1545341611, now seen corresponding path program 2 times [2023-08-24 02:24:38,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:38,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014739427] [2023-08-24 02:24:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:38,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:38,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014739427] [2023-08-24 02:24:38,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014739427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:38,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912539518] [2023-08-24 02:24:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:24:38,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:38,809 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 02:24:38,817 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 02:24:38,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:24:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:38,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:38,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:39,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:39,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912539518] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:39,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:39,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 02:24:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289542595] [2023-08-24 02:24:39,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:39,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:39,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:39,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 965 flow. Second operand has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 02:24:39,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:39,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:39,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:39,740 INFO L124 PetriNetUnfolderBase]: 233/468 cut-off events. [2023-08-24 02:24:39,740 INFO L125 PetriNetUnfolderBase]: For 3140/3140 co-relation queries the response was YES. [2023-08-24 02:24:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2665 conditions, 468 events. 233/468 cut-off events. For 3140/3140 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2164 event pairs, 6 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2617. Up to 115 conditions per place. [2023-08-24 02:24:39,744 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 91 selfloop transitions, 73 changer transitions 11/175 dead transitions. [2023-08-24 02:24:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 175 transitions, 1810 flow [2023-08-24 02:24:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 02:24:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 02:24:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1406 transitions. [2023-08-24 02:24:39,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869014859658778 [2023-08-24 02:24:39,747 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1406 transitions. [2023-08-24 02:24:39,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1406 transitions. [2023-08-24 02:24:39,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:39,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1406 transitions. [2023-08-24 02:24:39,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.130434782608695) internal successors, (1406), 23 states have internal predecessors, (1406), 0 states have call successors, (0), 0 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 02:24:39,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 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 02:24:39,753 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 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 02:24:39,753 INFO L175 Difference]: Start difference. First operand has 123 places, 92 transitions, 965 flow. Second operand 23 states and 1406 transitions. [2023-08-24 02:24:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 175 transitions, 1810 flow [2023-08-24 02:24:39,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1618 flow, removed 55 selfloop flow, removed 16 redundant places. [2023-08-24 02:24:39,768 INFO L231 Difference]: Finished difference. Result has 127 places, 117 transitions, 1275 flow [2023-08-24 02:24:39,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1275, PETRI_PLACES=127, PETRI_TRANSITIONS=117} [2023-08-24 02:24:39,769 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2023-08-24 02:24:39,769 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 117 transitions, 1275 flow [2023-08-24 02:24:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 02:24:39,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:39,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:39,776 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 02:24:39,974 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,SelfDestructingSolverStorable17 [2023-08-24 02:24:39,974 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 02:24:39,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:39,975 INFO L85 PathProgramCache]: Analyzing trace with hash -2123017817, now seen corresponding path program 3 times [2023-08-24 02:24:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:39,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350959843] [2023-08-24 02:24:39,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:39,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:40,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350959843] [2023-08-24 02:24:40,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350959843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:40,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716038011] [2023-08-24 02:24:40,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:24:40,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:40,168 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 02:24:40,171 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 02:24:40,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:24:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:40,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:40,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:40,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:40,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716038011] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:40,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:40,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-24 02:24:40,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348238391] [2023-08-24 02:24:40,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:40,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:24:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:24:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:24:40,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:40,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 117 transitions, 1275 flow. Second operand has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 02:24:40,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:40,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:40,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:40,954 INFO L124 PetriNetUnfolderBase]: 229/451 cut-off events. [2023-08-24 02:24:40,954 INFO L125 PetriNetUnfolderBase]: For 2388/2388 co-relation queries the response was YES. [2023-08-24 02:24:40,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 451 events. 229/451 cut-off events. For 2388/2388 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2038 event pairs, 2 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 2567. Up to 113 conditions per place. [2023-08-24 02:24:40,957 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 86 selfloop transitions, 62 changer transitions 29/177 dead transitions. [2023-08-24 02:24:40,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 177 transitions, 1865 flow [2023-08-24 02:24:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:24:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:24:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1186 transitions. [2023-08-24 02:24:40,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574442435201929 [2023-08-24 02:24:40,961 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1186 transitions. [2023-08-24 02:24:40,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1186 transitions. [2023-08-24 02:24:40,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:40,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1186 transitions. [2023-08-24 02:24:40,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 56.476190476190474) internal successors, (1186), 21 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 02:24:40,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:40,968 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:24:40,969 INFO L175 Difference]: Start difference. First operand has 127 places, 117 transitions, 1275 flow. Second operand 21 states and 1186 transitions. [2023-08-24 02:24:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 177 transitions, 1865 flow [2023-08-24 02:24:40,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1559 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-24 02:24:40,985 INFO L231 Difference]: Finished difference. Result has 138 places, 111 transitions, 1096 flow [2023-08-24 02:24:40,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1096, PETRI_PLACES=138, PETRI_TRANSITIONS=111} [2023-08-24 02:24:40,986 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-08-24 02:24:40,986 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 111 transitions, 1096 flow [2023-08-24 02:24:40,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 02:24:40,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:40,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:40,994 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 02:24:41,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:41,193 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 02:24:41,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash -526516953, now seen corresponding path program 4 times [2023-08-24 02:24:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:41,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993552894] [2023-08-24 02:24:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:41,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:41,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993552894] [2023-08-24 02:24:41,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993552894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643419235] [2023-08-24 02:24:41,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:24:41,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:41,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:41,356 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 02:24:41,381 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 02:24:41,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:24:41,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:41,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 02:24:41,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:41,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:41,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643419235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:41,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:41,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 02:24:41,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654178852] [2023-08-24 02:24:41,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:41,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:24:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:41,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:24:41,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:24:41,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:41,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 111 transitions, 1096 flow. Second operand has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 02:24:41,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:41,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:41,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:42,064 INFO L124 PetriNetUnfolderBase]: 192/373 cut-off events. [2023-08-24 02:24:42,064 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2023-08-24 02:24:42,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 373 events. 192/373 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1551 event pairs, 10 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 1950. Up to 91 conditions per place. [2023-08-24 02:24:42,067 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 72 selfloop transitions, 60 changer transitions 19/151 dead transitions. [2023-08-24 02:24:42,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 151 transitions, 1494 flow [2023-08-24 02:24:42,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 02:24:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 02:24:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1220 transitions. [2023-08-24 02:24:42,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860759493670886 [2023-08-24 02:24:42,069 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1220 transitions. [2023-08-24 02:24:42,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1220 transitions. [2023-08-24 02:24:42,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:42,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1220 transitions. [2023-08-24 02:24:42,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.0) internal successors, (1220), 20 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 02:24:42,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 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 02:24:42,074 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 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 02:24:42,074 INFO L175 Difference]: Start difference. First operand has 138 places, 111 transitions, 1096 flow. Second operand 20 states and 1220 transitions. [2023-08-24 02:24:42,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 151 transitions, 1494 flow [2023-08-24 02:24:42,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1316 flow, removed 20 selfloop flow, removed 17 redundant places. [2023-08-24 02:24:42,084 INFO L231 Difference]: Finished difference. Result has 129 places, 104 transitions, 994 flow [2023-08-24 02:24:42,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=994, PETRI_PLACES=129, PETRI_TRANSITIONS=104} [2023-08-24 02:24:42,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2023-08-24 02:24:42,085 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 104 transitions, 994 flow [2023-08-24 02:24:42,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 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 02:24:42,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:42,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:42,093 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 02:24:42,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:42,291 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 02:24:42,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -91998165, now seen corresponding path program 11 times [2023-08-24 02:24:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:42,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99772685] [2023-08-24 02:24:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99772685] [2023-08-24 02:24:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99772685] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:42,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882967644] [2023-08-24 02:24:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:24:42,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:42,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:42,497 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 02:24:42,506 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 02:24:42,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:24:42,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:42,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:42,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:42,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:42,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882967644] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:42,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:42,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:24:42,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547459804] [2023-08-24 02:24:42,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:42,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:24:42,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:24:42,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:24:42,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:42,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 104 transitions, 994 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:24:42,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:42,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:42,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:44,518 INFO L124 PetriNetUnfolderBase]: 411/776 cut-off events. [2023-08-24 02:24:44,518 INFO L125 PetriNetUnfolderBase]: For 3099/3099 co-relation queries the response was YES. [2023-08-24 02:24:44,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 776 events. 411/776 cut-off events. For 3099/3099 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3755 event pairs, 8 based on Foata normal form. 4/780 useless extension candidates. Maximal degree in co-relation 3745. Up to 221 conditions per place. [2023-08-24 02:24:44,523 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 133 selfloop transitions, 151 changer transitions 16/300 dead transitions. [2023-08-24 02:24:44,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 300 transitions, 2700 flow [2023-08-24 02:24:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 02:24:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 02:24:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2859 transitions. [2023-08-24 02:24:44,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38499865338001615 [2023-08-24 02:24:44,528 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2859 transitions. [2023-08-24 02:24:44,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2859 transitions. [2023-08-24 02:24:44,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:44,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2859 transitions. [2023-08-24 02:24:44,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.829787234042556) internal successors, (2859), 47 states have internal predecessors, (2859), 0 states have call successors, (0), 0 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 02:24:44,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 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 02:24:44,539 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 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 02:24:44,540 INFO L175 Difference]: Start difference. First operand has 129 places, 104 transitions, 994 flow. Second operand 47 states and 2859 transitions. [2023-08-24 02:24:44,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 300 transitions, 2700 flow [2023-08-24 02:24:44,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 300 transitions, 2485 flow, removed 4 selfloop flow, removed 18 redundant places. [2023-08-24 02:24:44,556 INFO L231 Difference]: Finished difference. Result has 162 places, 182 transitions, 1953 flow [2023-08-24 02:24:44,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1953, PETRI_PLACES=162, PETRI_TRANSITIONS=182} [2023-08-24 02:24:44,557 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 142 predicate places. [2023-08-24 02:24:44,557 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 182 transitions, 1953 flow [2023-08-24 02:24:44,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:24:44,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:44,557 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:44,563 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 02:24:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:44,763 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 02:24:44,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1117070417, now seen corresponding path program 12 times [2023-08-24 02:24:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976658596] [2023-08-24 02:24:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:44,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:44,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:44,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976658596] [2023-08-24 02:24:44,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976658596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:44,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523494115] [2023-08-24 02:24:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:24:44,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:44,971 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 02:24:44,998 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 02:24:45,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:24:45,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:45,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:45,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:45,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523494115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:45,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 02:24:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683040180] [2023-08-24 02:24:45,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:24:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:24:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:24:45,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:45,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 1953 flow. Second operand has 25 states, 25 states have (on average 52.84) internal successors, (1321), 25 states have internal predecessors, (1321), 0 states have call successors, (0), 0 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 02:24:45,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:45,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:45,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:46,211 INFO L124 PetriNetUnfolderBase]: 481/937 cut-off events. [2023-08-24 02:24:46,211 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-24 02:24:46,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5117 conditions, 937 events. 481/937 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4876 event pairs, 42 based on Foata normal form. 3/936 useless extension candidates. Maximal degree in co-relation 5065. Up to 329 conditions per place. [2023-08-24 02:24:46,217 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 149 selfloop transitions, 104 changer transitions 33/286 dead transitions. [2023-08-24 02:24:46,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 286 transitions, 3073 flow [2023-08-24 02:24:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 02:24:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 02:24:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1369 transitions. [2023-08-24 02:24:46,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36102320675105487 [2023-08-24 02:24:46,220 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1369 transitions. [2023-08-24 02:24:46,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1369 transitions. [2023-08-24 02:24:46,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:46,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1369 transitions. [2023-08-24 02:24:46,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.041666666666664) internal successors, (1369), 24 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:24:46,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 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 02:24:46,225 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 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 02:24:46,225 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 1953 flow. Second operand 24 states and 1369 transitions. [2023-08-24 02:24:46,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 286 transitions, 3073 flow [2023-08-24 02:24:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 286 transitions, 2405 flow, removed 252 selfloop flow, removed 20 redundant places. [2023-08-24 02:24:46,255 INFO L231 Difference]: Finished difference. Result has 163 places, 194 transitions, 1702 flow [2023-08-24 02:24:46,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1702, PETRI_PLACES=163, PETRI_TRANSITIONS=194} [2023-08-24 02:24:46,256 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-08-24 02:24:46,256 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 194 transitions, 1702 flow [2023-08-24 02:24:46,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.84) internal successors, (1321), 25 states have internal predecessors, (1321), 0 states have call successors, (0), 0 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 02:24:46,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:46,256 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:46,267 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 02:24:46,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 02:24:46,462 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 02:24:46,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -166177755, now seen corresponding path program 13 times [2023-08-24 02:24:46,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:46,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446204977] [2023-08-24 02:24:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446204977] [2023-08-24 02:24:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446204977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173562178] [2023-08-24 02:24:46,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:24:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:46,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:46,646 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 02:24:46,649 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 02:24:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:46,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:46,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:46,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:47,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173562178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:47,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:47,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:24:47,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856639394] [2023-08-24 02:24:47,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:47,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:24:47,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:47,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:24:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:24:47,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:47,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 194 transitions, 1702 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 02:24:47,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:47,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:47,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:48,428 INFO L124 PetriNetUnfolderBase]: 546/1053 cut-off events. [2023-08-24 02:24:48,429 INFO L125 PetriNetUnfolderBase]: For 2036/2036 co-relation queries the response was YES. [2023-08-24 02:24:48,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 1053 events. 546/1053 cut-off events. For 2036/2036 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5628 event pairs, 42 based on Foata normal form. 4/1049 useless extension candidates. Maximal degree in co-relation 4903. Up to 459 conditions per place. [2023-08-24 02:24:48,435 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 150 selfloop transitions, 137 changer transitions 42/329 dead transitions. [2023-08-24 02:24:48,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 329 transitions, 3027 flow [2023-08-24 02:24:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 02:24:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 02:24:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2379 transitions. [2023-08-24 02:24:48,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860759493670886 [2023-08-24 02:24:48,438 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2379 transitions. [2023-08-24 02:24:48,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2379 transitions. [2023-08-24 02:24:48,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:48,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2379 transitions. [2023-08-24 02:24:48,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.0) internal successors, (2379), 39 states have internal predecessors, (2379), 0 states have call successors, (0), 0 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 02:24:48,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 0 states have call successors, (0), 0 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 02:24:48,447 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 0 states have call successors, (0), 0 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 02:24:48,447 INFO L175 Difference]: Start difference. First operand has 163 places, 194 transitions, 1702 flow. Second operand 39 states and 2379 transitions. [2023-08-24 02:24:48,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 329 transitions, 3027 flow [2023-08-24 02:24:48,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 329 transitions, 2846 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-24 02:24:48,469 INFO L231 Difference]: Finished difference. Result has 195 places, 224 transitions, 2091 flow [2023-08-24 02:24:48,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2091, PETRI_PLACES=195, PETRI_TRANSITIONS=224} [2023-08-24 02:24:48,470 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2023-08-24 02:24:48,470 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 224 transitions, 2091 flow [2023-08-24 02:24:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 02:24:48,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:48,470 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:48,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 02:24:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:48,675 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 02:24:48,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1903450577, now seen corresponding path program 14 times [2023-08-24 02:24:48,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:48,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882222863] [2023-08-24 02:24:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:48,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:48,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882222863] [2023-08-24 02:24:48,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882222863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:48,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111317589] [2023-08-24 02:24:48,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:24:48,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:48,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:48,850 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 02:24:48,862 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 02:24:48,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:24:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:48,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:48,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:49,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:49,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111317589] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:49,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:49,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:24:49,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098187790] [2023-08-24 02:24:49,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:49,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:24:49,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:49,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:24:49,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:24:49,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:49,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 224 transitions, 2091 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:24:49,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:49,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:49,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:50,358 INFO L124 PetriNetUnfolderBase]: 595/1126 cut-off events. [2023-08-24 02:24:50,358 INFO L125 PetriNetUnfolderBase]: For 2433/2433 co-relation queries the response was YES. [2023-08-24 02:24:50,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5480 conditions, 1126 events. 595/1126 cut-off events. For 2433/2433 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5996 event pairs, 50 based on Foata normal form. 4/1122 useless extension candidates. Maximal degree in co-relation 5426. Up to 539 conditions per place. [2023-08-24 02:24:50,368 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 118 selfloop transitions, 135 changer transitions 62/315 dead transitions. [2023-08-24 02:24:50,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 315 transitions, 3129 flow [2023-08-24 02:24:50,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:24:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:24:50,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1933 transitions. [2023-08-24 02:24:50,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38231803797468356 [2023-08-24 02:24:50,371 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1933 transitions. [2023-08-24 02:24:50,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1933 transitions. [2023-08-24 02:24:50,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:50,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1933 transitions. [2023-08-24 02:24:50,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.40625) internal successors, (1933), 32 states have internal predecessors, (1933), 0 states have call successors, (0), 0 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 02:24:50,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 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 02:24:50,383 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 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 02:24:50,383 INFO L175 Difference]: Start difference. First operand has 195 places, 224 transitions, 2091 flow. Second operand 32 states and 1933 transitions. [2023-08-24 02:24:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 315 transitions, 3129 flow [2023-08-24 02:24:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 315 transitions, 2959 flow, removed 16 selfloop flow, removed 20 redundant places. [2023-08-24 02:24:50,411 INFO L231 Difference]: Finished difference. Result has 205 places, 216 transitions, 2164 flow [2023-08-24 02:24:50,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2164, PETRI_PLACES=205, PETRI_TRANSITIONS=216} [2023-08-24 02:24:50,414 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-24 02:24:50,414 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 216 transitions, 2164 flow [2023-08-24 02:24:50,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:24:50,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:50,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:50,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 02:24:50,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:50,619 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 02:24:50,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:50,620 INFO L85 PathProgramCache]: Analyzing trace with hash 92220133, now seen corresponding path program 15 times [2023-08-24 02:24:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:50,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854087425] [2023-08-24 02:24:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:50,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854087425] [2023-08-24 02:24:50,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854087425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:50,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621203527] [2023-08-24 02:24:50,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:24:50,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:50,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:50,789 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 02:24:50,796 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 02:24:50,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:24:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:50,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:50,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:51,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621203527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:51,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:24:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268448981] [2023-08-24 02:24:51,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:24:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:24:51,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:24:51,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:51,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 216 transitions, 2164 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 02:24:51,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:51,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:51,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:52,675 INFO L124 PetriNetUnfolderBase]: 642/1186 cut-off events. [2023-08-24 02:24:52,675 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2023-08-24 02:24:52,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6042 conditions, 1186 events. 642/1186 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6273 event pairs, 42 based on Foata normal form. 7/1185 useless extension candidates. Maximal degree in co-relation 5987. Up to 483 conditions per place. [2023-08-24 02:24:52,684 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 146 selfloop transitions, 157 changer transitions 32/335 dead transitions. [2023-08-24 02:24:52,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 335 transitions, 3459 flow [2023-08-24 02:24:52,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 02:24:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 02:24:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2012 transitions. [2023-08-24 02:24:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38588415803605675 [2023-08-24 02:24:52,686 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2012 transitions. [2023-08-24 02:24:52,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2012 transitions. [2023-08-24 02:24:52,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:52,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2012 transitions. [2023-08-24 02:24:52,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.96969696969697) internal successors, (2012), 33 states have internal predecessors, (2012), 0 states have call successors, (0), 0 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 02:24:52,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 158.0) internal successors, (5372), 34 states have internal predecessors, (5372), 0 states have call successors, (0), 0 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 02:24:52,691 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 158.0) internal successors, (5372), 34 states have internal predecessors, (5372), 0 states have call successors, (0), 0 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 02:24:52,691 INFO L175 Difference]: Start difference. First operand has 205 places, 216 transitions, 2164 flow. Second operand 33 states and 2012 transitions. [2023-08-24 02:24:52,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 335 transitions, 3459 flow [2023-08-24 02:24:52,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 335 transitions, 3243 flow, removed 31 selfloop flow, removed 25 redundant places. [2023-08-24 02:24:52,713 INFO L231 Difference]: Finished difference. Result has 194 places, 239 transitions, 2586 flow [2023-08-24 02:24:52,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2586, PETRI_PLACES=194, PETRI_TRANSITIONS=239} [2023-08-24 02:24:52,713 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-24 02:24:52,713 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 239 transitions, 2586 flow [2023-08-24 02:24:52,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 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 02:24:52,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:52,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:52,720 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 02:24:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:52,920 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 02:24:52,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1785092975, now seen corresponding path program 5 times [2023-08-24 02:24:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:52,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914763942] [2023-08-24 02:24:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:53,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:53,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914763942] [2023-08-24 02:24:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914763942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:53,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285248100] [2023-08-24 02:24:53,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:24:53,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:53,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:53,074 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 02:24:53,077 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 02:24:53,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:24:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:53,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:24:53,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:53,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:53,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285248100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:53,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:53,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 02:24:53,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564874920] [2023-08-24 02:24:53,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:53,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:24:53,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:53,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:24:53,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:24:53,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:53,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 239 transitions, 2586 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 02:24:53,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:53,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:53,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:54,138 INFO L124 PetriNetUnfolderBase]: 707/1354 cut-off events. [2023-08-24 02:24:54,138 INFO L125 PetriNetUnfolderBase]: For 4860/4860 co-relation queries the response was YES. [2023-08-24 02:24:54,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 1354 events. 707/1354 cut-off events. For 4860/4860 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7670 event pairs, 42 based on Foata normal form. 12/1358 useless extension candidates. Maximal degree in co-relation 7308. Up to 419 conditions per place. [2023-08-24 02:24:54,146 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 185 selfloop transitions, 195 changer transitions 31/411 dead transitions. [2023-08-24 02:24:54,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 411 transitions, 4615 flow [2023-08-24 02:24:54,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:24:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:24:54,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1759 transitions. [2023-08-24 02:24:54,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38389349628982977 [2023-08-24 02:24:54,149 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1759 transitions. [2023-08-24 02:24:54,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1759 transitions. [2023-08-24 02:24:54,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:54,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1759 transitions. [2023-08-24 02:24:54,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.6551724137931) internal successors, (1759), 29 states have internal predecessors, (1759), 0 states have call successors, (0), 0 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 02:24:54,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 0 states have call successors, (0), 0 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 02:24:54,154 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 0 states have call successors, (0), 0 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 02:24:54,155 INFO L175 Difference]: Start difference. First operand has 194 places, 239 transitions, 2586 flow. Second operand 29 states and 1759 transitions. [2023-08-24 02:24:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 411 transitions, 4615 flow [2023-08-24 02:24:54,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 411 transitions, 4399 flow, removed 58 selfloop flow, removed 18 redundant places. [2023-08-24 02:24:54,189 INFO L231 Difference]: Finished difference. Result has 205 places, 314 transitions, 3666 flow [2023-08-24 02:24:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3666, PETRI_PLACES=205, PETRI_TRANSITIONS=314} [2023-08-24 02:24:54,190 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-24 02:24:54,190 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 314 transitions, 3666 flow [2023-08-24 02:24:54,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 02:24:54,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:54,195 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 02:24:54,391 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,SelfDestructingSolverStorable25 [2023-08-24 02:24:54,391 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:24:54,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash 322753749, now seen corresponding path program 6 times [2023-08-24 02:24:54,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058406554] [2023-08-24 02:24:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058406554] [2023-08-24 02:24:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058406554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963356355] [2023-08-24 02:24:54,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:24:54,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:54,580 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 02:24:54,607 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 02:24:54,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:24:54,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:54,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:24:54,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:54,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963356355] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:54,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:54,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-08-24 02:24:54,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992376196] [2023-08-24 02:24:54,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:24:54,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:54,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:24:54,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:24:54,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:54,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 314 transitions, 3666 flow. Second operand has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 02:24:54,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:54,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:54,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:55,584 INFO L124 PetriNetUnfolderBase]: 704/1344 cut-off events. [2023-08-24 02:24:55,584 INFO L125 PetriNetUnfolderBase]: For 6115/6115 co-relation queries the response was YES. [2023-08-24 02:24:55,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 1344 events. 704/1344 cut-off events. For 6115/6115 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7603 event pairs, 18 based on Foata normal form. 9/1353 useless extension candidates. Maximal degree in co-relation 8012. Up to 671 conditions per place. [2023-08-24 02:24:55,592 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 235 selfloop transitions, 93 changer transitions 62/390 dead transitions. [2023-08-24 02:24:55,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 390 transitions, 4917 flow [2023-08-24 02:24:55,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 02:24:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 02:24:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1279 transitions. [2023-08-24 02:24:55,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519537699504678 [2023-08-24 02:24:55,593 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1279 transitions. [2023-08-24 02:24:55,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1279 transitions. [2023-08-24 02:24:55,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:55,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1279 transitions. [2023-08-24 02:24:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.608695652173914) internal successors, (1279), 23 states have internal predecessors, (1279), 0 states have call successors, (0), 0 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 02:24:55,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 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 02:24:55,597 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 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 02:24:55,597 INFO L175 Difference]: Start difference. First operand has 205 places, 314 transitions, 3666 flow. Second operand 23 states and 1279 transitions. [2023-08-24 02:24:55,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 390 transitions, 4917 flow [2023-08-24 02:24:55,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 390 transitions, 4566 flow, removed 123 selfloop flow, removed 12 redundant places. [2023-08-24 02:24:55,666 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3348 flow [2023-08-24 02:24:55,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3348, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2023-08-24 02:24:55,667 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-08-24 02:24:55,667 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3348 flow [2023-08-24 02:24:55,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 02:24:55,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:55,667 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:55,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 02:24:55,871 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,SelfDestructingSolverStorable26 [2023-08-24 02:24:55,872 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:24:55,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:55,872 INFO L85 PathProgramCache]: Analyzing trace with hash -97330651, now seen corresponding path program 16 times [2023-08-24 02:24:55,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:55,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088113841] [2023-08-24 02:24:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:55,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:56,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:56,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088113841] [2023-08-24 02:24:56,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088113841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:56,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607410234] [2023-08-24 02:24:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:24:56,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:56,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:56,046 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:24:56,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 02:24:56,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:24:56,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:56,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:56,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:56,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:56,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607410234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:56,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:56,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-24 02:24:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439605257] [2023-08-24 02:24:56,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:24:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:24:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:24:56,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:56,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3348 flow. Second operand has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 02:24:56,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:56,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:56,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:57,058 INFO L124 PetriNetUnfolderBase]: 614/1211 cut-off events. [2023-08-24 02:24:57,058 INFO L125 PetriNetUnfolderBase]: For 4994/4994 co-relation queries the response was YES. [2023-08-24 02:24:57,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7048 conditions, 1211 events. 614/1211 cut-off events. For 4994/4994 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6897 event pairs, 31 based on Foata normal form. 4/1213 useless extension candidates. Maximal degree in co-relation 6983. Up to 1126 conditions per place. [2023-08-24 02:24:57,067 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 288 selfloop transitions, 18 changer transitions 33/339 dead transitions. [2023-08-24 02:24:57,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 339 transitions, 4213 flow [2023-08-24 02:24:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 02:24:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 02:24:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1312 transitions. [2023-08-24 02:24:57,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37744533947065595 [2023-08-24 02:24:57,074 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1312 transitions. [2023-08-24 02:24:57,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1312 transitions. [2023-08-24 02:24:57,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:57,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1312 transitions. [2023-08-24 02:24:57,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 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 02:24:57,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 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 02:24:57,078 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 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 02:24:57,078 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3348 flow. Second operand 22 states and 1312 transitions. [2023-08-24 02:24:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 339 transitions, 4213 flow [2023-08-24 02:24:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 339 transitions, 4004 flow, removed 22 selfloop flow, removed 24 redundant places. [2023-08-24 02:24:57,125 INFO L231 Difference]: Finished difference. Result has 212 places, 294 transitions, 3207 flow [2023-08-24 02:24:57,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3207, PETRI_PLACES=212, PETRI_TRANSITIONS=294} [2023-08-24 02:24:57,126 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2023-08-24 02:24:57,126 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 294 transitions, 3207 flow [2023-08-24 02:24:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 02:24:57,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:57,126 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:57,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 02:24:57,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 02:24:57,331 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:24:57,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 898903303, now seen corresponding path program 17 times [2023-08-24 02:24:57,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:57,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369301137] [2023-08-24 02:24:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:57,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:57,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:57,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369301137] [2023-08-24 02:24:57,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369301137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:57,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012551489] [2023-08-24 02:24:57,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:24:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:57,520 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:24:57,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 02:24:57,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:24:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:57,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:57,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:57,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012551489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:58,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 02:24:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984465884] [2023-08-24 02:24:58,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:58,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:24:58,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:24:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:24:58,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:24:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 294 transitions, 3207 flow. Second operand has 25 states, 25 states have (on average 52.76) internal successors, (1319), 25 states have internal predecessors, (1319), 0 states have call successors, (0), 0 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 02:24:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:24:58,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:24:58,996 INFO L124 PetriNetUnfolderBase]: 675/1318 cut-off events. [2023-08-24 02:24:58,996 INFO L125 PetriNetUnfolderBase]: For 3945/3945 co-relation queries the response was YES. [2023-08-24 02:24:59,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 1318 events. 675/1318 cut-off events. For 3945/3945 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7591 event pairs, 33 based on Foata normal form. 6/1322 useless extension candidates. Maximal degree in co-relation 7029. Up to 1088 conditions per place. [2023-08-24 02:24:59,005 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 295 selfloop transitions, 56 changer transitions 38/389 dead transitions. [2023-08-24 02:24:59,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 389 transitions, 4619 flow [2023-08-24 02:24:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:24:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:24:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1758 transitions. [2023-08-24 02:24:59,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34770569620253167 [2023-08-24 02:24:59,016 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1758 transitions. [2023-08-24 02:24:59,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1758 transitions. [2023-08-24 02:24:59,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:24:59,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1758 transitions. [2023-08-24 02:24:59,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.9375) internal successors, (1758), 32 states have internal predecessors, (1758), 0 states have call successors, (0), 0 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 02:24:59,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 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 02:24:59,022 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 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 02:24:59,022 INFO L175 Difference]: Start difference. First operand has 212 places, 294 transitions, 3207 flow. Second operand 32 states and 1758 transitions. [2023-08-24 02:24:59,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 389 transitions, 4619 flow [2023-08-24 02:24:59,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 389 transitions, 4526 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-08-24 02:24:59,065 INFO L231 Difference]: Finished difference. Result has 220 places, 317 transitions, 3574 flow [2023-08-24 02:24:59,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3574, PETRI_PLACES=220, PETRI_TRANSITIONS=317} [2023-08-24 02:24:59,068 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-08-24 02:24:59,068 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 317 transitions, 3574 flow [2023-08-24 02:24:59,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.76) internal successors, (1319), 25 states have internal predecessors, (1319), 0 states have call successors, (0), 0 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 02:24:59,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:24:59,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:24:59,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 02:24:59,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:59,273 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:24:59,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:24:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2083075115, now seen corresponding path program 18 times [2023-08-24 02:24:59,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:24:59,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931816132] [2023-08-24 02:24:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:24:59,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:24:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:24:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:24:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:24:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931816132] [2023-08-24 02:24:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931816132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:24:59,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471473791] [2023-08-24 02:24:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:24:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:24:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:24:59,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:24:59,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 02:24:59,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:24:59,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:24:59,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:24:59,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:24:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:59,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:24:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:24:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471473791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:24:59,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:24:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:24:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206113706] [2023-08-24 02:24:59,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:24:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:24:59,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:24:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:24:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:24:59,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:24:59,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 317 transitions, 3574 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:24:59,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:24:59,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:24:59,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:00,267 INFO L124 PetriNetUnfolderBase]: 643/1253 cut-off events. [2023-08-24 02:25:00,268 INFO L125 PetriNetUnfolderBase]: For 3938/3938 co-relation queries the response was YES. [2023-08-24 02:25:00,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 1253 events. 643/1253 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7089 event pairs, 33 based on Foata normal form. 3/1254 useless extension candidates. Maximal degree in co-relation 6891. Up to 1192 conditions per place. [2023-08-24 02:25:00,278 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 307 selfloop transitions, 6 changer transitions 33/346 dead transitions. [2023-08-24 02:25:00,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 346 transitions, 4403 flow [2023-08-24 02:25:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:25:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:25:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 840 transitions. [2023-08-24 02:25:00,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379746835443038 [2023-08-24 02:25:00,280 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 840 transitions. [2023-08-24 02:25:00,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 840 transitions. [2023-08-24 02:25:00,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:00,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 840 transitions. [2023-08-24 02:25:00,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.0) internal successors, (840), 14 states have internal predecessors, (840), 0 states have call successors, (0), 0 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 02:25:00,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:25:00,283 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 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 02:25:00,283 INFO L175 Difference]: Start difference. First operand has 220 places, 317 transitions, 3574 flow. Second operand 14 states and 840 transitions. [2023-08-24 02:25:00,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 346 transitions, 4403 flow [2023-08-24 02:25:00,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 346 transitions, 4061 flow, removed 126 selfloop flow, removed 26 redundant places. [2023-08-24 02:25:00,330 INFO L231 Difference]: Finished difference. Result has 200 places, 309 transitions, 3177 flow [2023-08-24 02:25:00,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3177, PETRI_PLACES=200, PETRI_TRANSITIONS=309} [2023-08-24 02:25:00,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 02:25:00,330 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 309 transitions, 3177 flow [2023-08-24 02:25:00,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 02:25:00,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:00,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:00,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 02:25:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:00,536 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:00,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash 798658203, now seen corresponding path program 7 times [2023-08-24 02:25:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:00,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533525091] [2023-08-24 02:25:00,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:00,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:00,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533525091] [2023-08-24 02:25:00,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533525091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779192348] [2023-08-24 02:25:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:00,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:00,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:00,714 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:00,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 02:25:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:00,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:25:00,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:00,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779192348] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:01,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 02:25:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846142045] [2023-08-24 02:25:01,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:01,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:01,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 309 transitions, 3177 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 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 02:25:01,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:01,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:01,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:01,725 INFO L124 PetriNetUnfolderBase]: 659/1285 cut-off events. [2023-08-24 02:25:01,725 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-24 02:25:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 1285 events. 659/1285 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7357 event pairs, 33 based on Foata normal form. 9/1286 useless extension candidates. Maximal degree in co-relation 6555. Up to 1052 conditions per place. [2023-08-24 02:25:01,733 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 319 selfloop transitions, 67 changer transitions 17/403 dead transitions. [2023-08-24 02:25:01,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 403 transitions, 4502 flow [2023-08-24 02:25:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:25:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:25:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1630 transitions. [2023-08-24 02:25:01,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820909517112049 [2023-08-24 02:25:01,736 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1630 transitions. [2023-08-24 02:25:01,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1630 transitions. [2023-08-24 02:25:01,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:01,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1630 transitions. [2023-08-24 02:25:01,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.370370370370374) internal successors, (1630), 27 states have internal predecessors, (1630), 0 states have call successors, (0), 0 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 02:25:01,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 0 states have call successors, (0), 0 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 02:25:01,741 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 0 states have call successors, (0), 0 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 02:25:01,741 INFO L175 Difference]: Start difference. First operand has 200 places, 309 transitions, 3177 flow. Second operand 27 states and 1630 transitions. [2023-08-24 02:25:01,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 403 transitions, 4502 flow [2023-08-24 02:25:01,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 403 transitions, 4438 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-24 02:25:01,781 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 3577 flow [2023-08-24 02:25:01,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3577, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2023-08-24 02:25:01,782 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 190 predicate places. [2023-08-24 02:25:01,782 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 3577 flow [2023-08-24 02:25:01,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 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 02:25:01,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:01,783 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:01,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-24 02:25:01,991 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:01,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:01,991 INFO L85 PathProgramCache]: Analyzing trace with hash 723123603, now seen corresponding path program 8 times [2023-08-24 02:25:01,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:01,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209673989] [2023-08-24 02:25:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209673989] [2023-08-24 02:25:02,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209673989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:02,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94217414] [2023-08-24 02:25:02,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:02,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:02,151 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:02,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 02:25:02,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:02,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:02,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:25:02,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:02,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94217414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:02,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:02,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 02:25:02,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681956816] [2023-08-24 02:25:02,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:02,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:02,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:02,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 3577 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 0 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 02:25:02,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:02,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:02,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:03,107 INFO L124 PetriNetUnfolderBase]: 660/1288 cut-off events. [2023-08-24 02:25:03,107 INFO L125 PetriNetUnfolderBase]: For 4557/4557 co-relation queries the response was YES. [2023-08-24 02:25:03,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 1288 events. 660/1288 cut-off events. For 4557/4557 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7406 event pairs, 35 based on Foata normal form. 7/1291 useless extension candidates. Maximal degree in co-relation 6902. Up to 1052 conditions per place. [2023-08-24 02:25:03,114 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 312 selfloop transitions, 63 changer transitions 19/394 dead transitions. [2023-08-24 02:25:03,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 394 transitions, 4633 flow [2023-08-24 02:25:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 02:25:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 02:25:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1507 transitions. [2023-08-24 02:25:03,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38151898734177214 [2023-08-24 02:25:03,116 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1507 transitions. [2023-08-24 02:25:03,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1507 transitions. [2023-08-24 02:25:03,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:03,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1507 transitions. [2023-08-24 02:25:03,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.28) internal successors, (1507), 25 states have internal predecessors, (1507), 0 states have call successors, (0), 0 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 02:25:03,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 158.0) internal successors, (4108), 26 states have internal predecessors, (4108), 0 states have call successors, (0), 0 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 02:25:03,121 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 158.0) internal successors, (4108), 26 states have internal predecessors, (4108), 0 states have call successors, (0), 0 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 02:25:03,121 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 3577 flow. Second operand 25 states and 1507 transitions. [2023-08-24 02:25:03,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 394 transitions, 4633 flow [2023-08-24 02:25:03,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 394 transitions, 4385 flow, removed 110 selfloop flow, removed 10 redundant places. [2023-08-24 02:25:03,167 INFO L231 Difference]: Finished difference. Result has 226 places, 335 transitions, 3503 flow [2023-08-24 02:25:03,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3503, PETRI_PLACES=226, PETRI_TRANSITIONS=335} [2023-08-24 02:25:03,168 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-24 02:25:03,168 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 335 transitions, 3503 flow [2023-08-24 02:25:03,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 0 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 02:25:03,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:03,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:03,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:03,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-24 02:25:03,374 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:03,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:03,375 INFO L85 PathProgramCache]: Analyzing trace with hash -148667421, now seen corresponding path program 9 times [2023-08-24 02:25:03,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:03,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547075219] [2023-08-24 02:25:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:03,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547075219] [2023-08-24 02:25:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547075219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:03,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459250720] [2023-08-24 02:25:03,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:03,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:03,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:03,525 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:03,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 02:25:03,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:25:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:03,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:25:03,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:03,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:03,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459250720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:03,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:03,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 02:25:03,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545167593] [2023-08-24 02:25:03,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:03,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:03,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:03,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:03,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 335 transitions, 3503 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 02:25:03,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:03,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:03,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:04,308 INFO L124 PetriNetUnfolderBase]: 658/1281 cut-off events. [2023-08-24 02:25:04,308 INFO L125 PetriNetUnfolderBase]: For 4571/4571 co-relation queries the response was YES. [2023-08-24 02:25:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6876 conditions, 1281 events. 658/1281 cut-off events. For 4571/4571 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7365 event pairs, 16 based on Foata normal form. 10/1287 useless extension candidates. Maximal degree in co-relation 6820. Up to 1016 conditions per place. [2023-08-24 02:25:04,315 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 306 selfloop transitions, 36 changer transitions 45/387 dead transitions. [2023-08-24 02:25:04,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 387 transitions, 4532 flow [2023-08-24 02:25:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:25:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:25:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1153 transitions. [2023-08-24 02:25:04,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38407728181212525 [2023-08-24 02:25:04,318 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1153 transitions. [2023-08-24 02:25:04,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1153 transitions. [2023-08-24 02:25:04,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:04,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1153 transitions. [2023-08-24 02:25:04,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.68421052631579) internal successors, (1153), 19 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 02:25:04,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:25:04,322 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 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 02:25:04,322 INFO L175 Difference]: Start difference. First operand has 226 places, 335 transitions, 3503 flow. Second operand 19 states and 1153 transitions. [2023-08-24 02:25:04,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 387 transitions, 4532 flow [2023-08-24 02:25:04,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 387 transitions, 4386 flow, removed 12 selfloop flow, removed 21 redundant places. [2023-08-24 02:25:04,388 INFO L231 Difference]: Finished difference. Result has 221 places, 321 transitions, 3332 flow [2023-08-24 02:25:04,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3332, PETRI_PLACES=221, PETRI_TRANSITIONS=321} [2023-08-24 02:25:04,388 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-08-24 02:25:04,389 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 321 transitions, 3332 flow [2023-08-24 02:25:04,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 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 02:25:04,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:04,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:04,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-24 02:25:04,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:04,589 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:04,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash -820035049, now seen corresponding path program 19 times [2023-08-24 02:25:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759903056] [2023-08-24 02:25:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:04,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:04,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759903056] [2023-08-24 02:25:04,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759903056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:04,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517294807] [2023-08-24 02:25:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:04,771 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:04,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 02:25:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:04,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:04,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:05,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:05,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517294807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:05,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:05,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-24 02:25:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934004587] [2023-08-24 02:25:05,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:05,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:25:05,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:25:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:25:05,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:05,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 321 transitions, 3332 flow. Second operand has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 02:25:05,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:05,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:05,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:06,447 INFO L124 PetriNetUnfolderBase]: 626/1251 cut-off events. [2023-08-24 02:25:06,447 INFO L125 PetriNetUnfolderBase]: For 4152/4152 co-relation queries the response was YES. [2023-08-24 02:25:06,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1251 events. 626/1251 cut-off events. For 4152/4152 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7304 event pairs, 17 based on Foata normal form. 4/1251 useless extension candidates. Maximal degree in co-relation 6514. Up to 960 conditions per place. [2023-08-24 02:25:06,453 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 319 selfloop transitions, 80 changer transitions 27/426 dead transitions. [2023-08-24 02:25:06,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 426 transitions, 4701 flow [2023-08-24 02:25:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:25:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:25:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2162 transitions. [2023-08-24 02:25:06,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380098452883263 [2023-08-24 02:25:06,456 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2162 transitions. [2023-08-24 02:25:06,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2162 transitions. [2023-08-24 02:25:06,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:06,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2162 transitions. [2023-08-24 02:25:06,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 60.05555555555556) internal successors, (2162), 36 states have internal predecessors, (2162), 0 states have call successors, (0), 0 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 02:25:06,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 0 states have call successors, (0), 0 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 02:25:06,463 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 0 states have call successors, (0), 0 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 02:25:06,463 INFO L175 Difference]: Start difference. First operand has 221 places, 321 transitions, 3332 flow. Second operand 36 states and 2162 transitions. [2023-08-24 02:25:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 426 transitions, 4701 flow [2023-08-24 02:25:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 426 transitions, 4500 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-08-24 02:25:06,505 INFO L231 Difference]: Finished difference. Result has 234 places, 345 transitions, 3618 flow [2023-08-24 02:25:06,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3618, PETRI_PLACES=234, PETRI_TRANSITIONS=345} [2023-08-24 02:25:06,506 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 214 predicate places. [2023-08-24 02:25:06,506 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 345 transitions, 3618 flow [2023-08-24 02:25:06,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 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 02:25:06,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:06,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:06,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:06,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:06,711 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:06,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:06,711 INFO L85 PathProgramCache]: Analyzing trace with hash -895569649, now seen corresponding path program 20 times [2023-08-24 02:25:06,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:06,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911130992] [2023-08-24 02:25:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:06,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:06,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:06,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911130992] [2023-08-24 02:25:06,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911130992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:06,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469828553] [2023-08-24 02:25:06,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:06,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:06,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:06,881 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:06,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 02:25:06,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:06,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:06,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:06,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469828553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:07,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 02:25:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183460153] [2023-08-24 02:25:07,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:07,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 02:25:07,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:07,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 02:25:07,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 02:25:07,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:07,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 345 transitions, 3618 flow. Second operand has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 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 02:25:07,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:07,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:07,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:08,317 INFO L124 PetriNetUnfolderBase]: 617/1212 cut-off events. [2023-08-24 02:25:08,318 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-08-24 02:25:08,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1212 events. 617/1212 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6892 event pairs, 19 based on Foata normal form. 4/1214 useless extension candidates. Maximal degree in co-relation 6314. Up to 960 conditions per place. [2023-08-24 02:25:08,323 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 299 selfloop transitions, 63 changer transitions 37/399 dead transitions. [2023-08-24 02:25:08,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 399 transitions, 4548 flow [2023-08-24 02:25:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 02:25:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 02:25:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1572 transitions. [2023-08-24 02:25:08,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266796494644595 [2023-08-24 02:25:08,325 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1572 transitions. [2023-08-24 02:25:08,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1572 transitions. [2023-08-24 02:25:08,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:08,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1572 transitions. [2023-08-24 02:25:08,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.46153846153846) internal successors, (1572), 26 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 02:25:08,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 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 02:25:08,329 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 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 02:25:08,329 INFO L175 Difference]: Start difference. First operand has 234 places, 345 transitions, 3618 flow. Second operand 26 states and 1572 transitions. [2023-08-24 02:25:08,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 399 transitions, 4548 flow [2023-08-24 02:25:08,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 399 transitions, 4402 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-08-24 02:25:08,371 INFO L231 Difference]: Finished difference. Result has 236 places, 337 transitions, 3532 flow [2023-08-24 02:25:08,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3532, PETRI_PLACES=236, PETRI_TRANSITIONS=337} [2023-08-24 02:25:08,372 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 216 predicate places. [2023-08-24 02:25:08,372 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 337 transitions, 3532 flow [2023-08-24 02:25:08,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 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 02:25:08,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:08,373 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:08,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:08,575 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:08,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:08,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1787808693, now seen corresponding path program 10 times [2023-08-24 02:25:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668038877] [2023-08-24 02:25:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668038877] [2023-08-24 02:25:08,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668038877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672013091] [2023-08-24 02:25:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:08,730 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:08,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 02:25:08,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:08,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:08,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:08,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:09,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:09,118 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 02:25:09,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672013091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:09,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:09,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2023-08-24 02:25:09,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502320461] [2023-08-24 02:25:09,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:09,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:25:09,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:25:09,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:25:09,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:09,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 337 transitions, 3532 flow. Second operand has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 02:25:09,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:09,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:09,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:09,640 INFO L124 PetriNetUnfolderBase]: 595/1159 cut-off events. [2023-08-24 02:25:09,640 INFO L125 PetriNetUnfolderBase]: For 2999/2999 co-relation queries the response was YES. [2023-08-24 02:25:09,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6127 conditions, 1159 events. 595/1159 cut-off events. For 2999/2999 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6474 event pairs, 13 based on Foata normal form. 11/1168 useless extension candidates. Maximal degree in co-relation 6068. Up to 317 conditions per place. [2023-08-24 02:25:09,646 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 205 selfloop transitions, 171 changer transitions 29/405 dead transitions. [2023-08-24 02:25:09,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 405 transitions, 4678 flow [2023-08-24 02:25:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 02:25:09,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 02:25:09,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1570 transitions. [2023-08-24 02:25:09,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821811100292113 [2023-08-24 02:25:09,649 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1570 transitions. [2023-08-24 02:25:09,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1570 transitions. [2023-08-24 02:25:09,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:09,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1570 transitions. [2023-08-24 02:25:09,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.38461538461539) internal successors, (1570), 26 states have internal predecessors, (1570), 0 states have call successors, (0), 0 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 02:25:09,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 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 02:25:09,652 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 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 02:25:09,652 INFO L175 Difference]: Start difference. First operand has 236 places, 337 transitions, 3532 flow. Second operand 26 states and 1570 transitions. [2023-08-24 02:25:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 405 transitions, 4678 flow [2023-08-24 02:25:09,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 405 transitions, 4549 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-08-24 02:25:09,681 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 3647 flow [2023-08-24 02:25:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3647, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2023-08-24 02:25:09,681 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2023-08-24 02:25:09,682 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 3647 flow [2023-08-24 02:25:09,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 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 02:25:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:09,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:09,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:09,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 02:25:09,888 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:09,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:09,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1555403823, now seen corresponding path program 11 times [2023-08-24 02:25:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124718151] [2023-08-24 02:25:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:09,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:10,030 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 02:25:10,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:10,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124718151] [2023-08-24 02:25:10,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124718151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:10,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952478982] [2023-08-24 02:25:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:10,031 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:10,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 02:25:10,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:25:10,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:10,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:10,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:10,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:10,362 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 02:25:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952478982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:10,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:10,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-24 02:25:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156784879] [2023-08-24 02:25:10,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:10,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 3647 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 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 02:25:10,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:10,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:10,780 INFO L124 PetriNetUnfolderBase]: 564/1084 cut-off events. [2023-08-24 02:25:10,780 INFO L125 PetriNetUnfolderBase]: For 3130/3130 co-relation queries the response was YES. [2023-08-24 02:25:10,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 1084 events. 564/1084 cut-off events. For 3130/3130 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5824 event pairs, 13 based on Foata normal form. 9/1091 useless extension candidates. Maximal degree in co-relation 6020. Up to 333 conditions per place. [2023-08-24 02:25:10,785 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 113 selfloop transitions, 29 changer transitions 226/368 dead transitions. [2023-08-24 02:25:10,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 368 transitions, 4590 flow [2023-08-24 02:25:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:25:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:25:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1082 transitions. [2023-08-24 02:25:10,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38045007032348804 [2023-08-24 02:25:10,787 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1082 transitions. [2023-08-24 02:25:10,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1082 transitions. [2023-08-24 02:25:10,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:10,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1082 transitions. [2023-08-24 02:25:10,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.111111111111114) internal successors, (1082), 18 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 02:25:10,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 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 02:25:10,791 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 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 02:25:10,791 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 3647 flow. Second operand 18 states and 1082 transitions. [2023-08-24 02:25:10,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 368 transitions, 4590 flow [2023-08-24 02:25:10,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 368 transitions, 4280 flow, removed 33 selfloop flow, removed 20 redundant places. [2023-08-24 02:25:10,828 INFO L231 Difference]: Finished difference. Result has 216 places, 130 transitions, 1211 flow [2023-08-24 02:25:10,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1211, PETRI_PLACES=216, PETRI_TRANSITIONS=130} [2023-08-24 02:25:10,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-08-24 02:25:10,829 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 130 transitions, 1211 flow [2023-08-24 02:25:10,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 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 02:25:10,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:10,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:10,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:11,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 02:25:11,036 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:11,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1586501437, now seen corresponding path program 12 times [2023-08-24 02:25:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387972757] [2023-08-24 02:25:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:11,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387972757] [2023-08-24 02:25:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387972757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:11,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109515537] [2023-08-24 02:25:11,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:25:11,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:11,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:11,208 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:11,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 02:25:11,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:25:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:11,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 02:25:11,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109515537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:11,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:11,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 02:25:11,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691307160] [2023-08-24 02:25:11,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:11,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 02:25:11,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:11,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 02:25:11,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-08-24 02:25:11,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:11,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 130 transitions, 1211 flow. Second operand has 27 states, 27 states have (on average 57.55555555555556) internal successors, (1554), 27 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 02:25:11,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:11,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:11,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:12,245 INFO L124 PetriNetUnfolderBase]: 194/460 cut-off events. [2023-08-24 02:25:12,245 INFO L125 PetriNetUnfolderBase]: For 906/906 co-relation queries the response was YES. [2023-08-24 02:25:12,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 460 events. 194/460 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2343 event pairs, 5 based on Foata normal form. 5/465 useless extension candidates. Maximal degree in co-relation 2093. Up to 275 conditions per place. [2023-08-24 02:25:12,247 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 131 selfloop transitions, 24 changer transitions 15/170 dead transitions. [2023-08-24 02:25:12,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 1670 flow [2023-08-24 02:25:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:25:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:25:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1253 transitions. [2023-08-24 02:25:12,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763713080168776 [2023-08-24 02:25:12,248 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1253 transitions. [2023-08-24 02:25:12,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1253 transitions. [2023-08-24 02:25:12,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:12,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1253 transitions. [2023-08-24 02:25:12,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.666666666666664) internal successors, (1253), 21 states have internal predecessors, (1253), 0 states have call successors, (0), 0 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 02:25:12,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:25:12,251 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 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 02:25:12,251 INFO L175 Difference]: Start difference. First operand has 216 places, 130 transitions, 1211 flow. Second operand 21 states and 1253 transitions. [2023-08-24 02:25:12,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 1670 flow [2023-08-24 02:25:12,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 170 transitions, 1345 flow, removed 29 selfloop flow, removed 49 redundant places. [2023-08-24 02:25:12,258 INFO L231 Difference]: Finished difference. Result has 134 places, 126 transitions, 928 flow [2023-08-24 02:25:12,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=928, PETRI_PLACES=134, PETRI_TRANSITIONS=126} [2023-08-24 02:25:12,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 02:25:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 126 transitions, 928 flow [2023-08-24 02:25:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 57.55555555555556) internal successors, (1554), 27 states have internal predecessors, (1554), 0 states have call successors, (0), 0 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 02:25:12,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:12,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:12,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-24 02:25:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 02:25:12,460 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:12,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:12,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1510966837, now seen corresponding path program 13 times [2023-08-24 02:25:12,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:12,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568529357] [2023-08-24 02:25:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568529357] [2023-08-24 02:25:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568529357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249983494] [2023-08-24 02:25:12,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:12,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:12,625 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:12,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 02:25:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:12,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:12,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:12,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:25:12,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249983494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:12,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:12,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 02:25:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375849455] [2023-08-24 02:25:12,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:12,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 02:25:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 02:25:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:25:12,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:12,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 126 transitions, 928 flow. Second operand has 22 states, 22 states have (on average 57.68181818181818) internal successors, (1269), 22 states have internal predecessors, (1269), 0 states have call successors, (0), 0 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 02:25:12,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:12,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:12,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:13,295 INFO L124 PetriNetUnfolderBase]: 184/410 cut-off events. [2023-08-24 02:25:13,295 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2023-08-24 02:25:13,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 410 events. 184/410 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1890 event pairs, 3 based on Foata normal form. 5/409 useless extension candidates. Maximal degree in co-relation 1652. Up to 264 conditions per place. [2023-08-24 02:25:13,296 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 97 selfloop transitions, 8 changer transitions 47/152 dead transitions. [2023-08-24 02:25:13,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 152 transitions, 1300 flow [2023-08-24 02:25:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:25:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:25:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 955 transitions. [2023-08-24 02:25:13,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37776898734177217 [2023-08-24 02:25:13,297 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 955 transitions. [2023-08-24 02:25:13,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 955 transitions. [2023-08-24 02:25:13,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:13,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 955 transitions. [2023-08-24 02:25:13,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.6875) internal successors, (955), 16 states have internal predecessors, (955), 0 states have call successors, (0), 0 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 02:25:13,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:25:13,300 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:25:13,300 INFO L175 Difference]: Start difference. First operand has 134 places, 126 transitions, 928 flow. Second operand 16 states and 955 transitions. [2023-08-24 02:25:13,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 152 transitions, 1300 flow [2023-08-24 02:25:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1238 flow, removed 7 selfloop flow, removed 16 redundant places. [2023-08-24 02:25:13,304 INFO L231 Difference]: Finished difference. Result has 128 places, 102 transitions, 757 flow [2023-08-24 02:25:13,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=757, PETRI_PLACES=128, PETRI_TRANSITIONS=102} [2023-08-24 02:25:13,305 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2023-08-24 02:25:13,305 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 102 transitions, 757 flow [2023-08-24 02:25:13,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.68181818181818) internal successors, (1269), 22 states have internal predecessors, (1269), 0 states have call successors, (0), 0 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 02:25:13,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:13,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:13,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-24 02:25:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 02:25:13,509 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2117131147, now seen corresponding path program 14 times [2023-08-24 02:25:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099600455] [2023-08-24 02:25:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:13,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:13,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099600455] [2023-08-24 02:25:13,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099600455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:13,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445985553] [2023-08-24 02:25:13,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:13,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:13,666 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:13,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 02:25:13,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:13,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:13,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:13,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:25:14,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445985553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:14,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:14,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 02:25:14,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333775819] [2023-08-24 02:25:14,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 02:25:14,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 02:25:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:25:14,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:14,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 102 transitions, 757 flow. Second operand has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 02:25:14,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:14,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:14,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:14,430 INFO L124 PetriNetUnfolderBase]: 146/331 cut-off events. [2023-08-24 02:25:14,430 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-24 02:25:14,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 331 events. 146/331 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1459 event pairs, 0 based on Foata normal form. 6/333 useless extension candidates. Maximal degree in co-relation 1341. Up to 125 conditions per place. [2023-08-24 02:25:14,431 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 75 selfloop transitions, 48 changer transitions 21/144 dead transitions. [2023-08-24 02:25:14,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1180 flow [2023-08-24 02:25:14,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 02:25:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 02:25:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1197 transitions. [2023-08-24 02:25:14,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787974683544304 [2023-08-24 02:25:14,433 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1197 transitions. [2023-08-24 02:25:14,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1197 transitions. [2023-08-24 02:25:14,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:14,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1197 transitions. [2023-08-24 02:25:14,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 02:25:14,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 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 02:25:14,435 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 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 02:25:14,435 INFO L175 Difference]: Start difference. First operand has 128 places, 102 transitions, 757 flow. Second operand 20 states and 1197 transitions. [2023-08-24 02:25:14,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1180 flow [2023-08-24 02:25:14,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1091 flow, removed 23 selfloop flow, removed 15 redundant places. [2023-08-24 02:25:14,440 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 775 flow [2023-08-24 02:25:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=775, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-08-24 02:25:14,440 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-24 02:25:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 775 flow [2023-08-24 02:25:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 0 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 02:25:14,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:14,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:14,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:14,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 02:25:14,641 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1040696963, now seen corresponding path program 15 times [2023-08-24 02:25:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675258943] [2023-08-24 02:25:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:14,807 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 02:25:14,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675258943] [2023-08-24 02:25:14,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675258943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:14,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15414736] [2023-08-24 02:25:14,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:14,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:14,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:14,809 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:14,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 02:25:14,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:25:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:14,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:14,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:15,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:15,191 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 02:25:15,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15414736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:15,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:15,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-08-24 02:25:15,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419611848] [2023-08-24 02:25:15,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:25:15,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:15,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:25:15,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:25:15,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 02:25:15,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 775 flow. Second operand has 21 states, 21 states have (on average 52.857142857142854) internal successors, (1110), 21 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 02:25:15,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:15,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 02:25:15,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:15,434 INFO L124 PetriNetUnfolderBase]: 133/287 cut-off events. [2023-08-24 02:25:15,434 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-24 02:25:15,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 287 events. 133/287 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1133 event pairs, 0 based on Foata normal form. 5/286 useless extension candidates. Maximal degree in co-relation 1224. Up to 117 conditions per place. [2023-08-24 02:25:15,435 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 24 selfloop transitions, 16 changer transitions 83/123 dead transitions. [2023-08-24 02:25:15,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 1082 flow [2023-08-24 02:25:15,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:25:15,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:25:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 867 transitions. [2023-08-24 02:25:15,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34295886075949367 [2023-08-24 02:25:15,436 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 867 transitions. [2023-08-24 02:25:15,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 867 transitions. [2023-08-24 02:25:15,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:15,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 867 transitions. [2023-08-24 02:25:15,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 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 02:25:15,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:25:15,439 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:25:15,439 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 775 flow. Second operand 16 states and 867 transitions. [2023-08-24 02:25:15,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 1082 flow [2023-08-24 02:25:15,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 123 transitions, 1005 flow, removed 7 selfloop flow, removed 14 redundant places. [2023-08-24 02:25:15,444 INFO L231 Difference]: Finished difference. Result has 99 places, 33 transitions, 187 flow [2023-08-24 02:25:15,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=187, PETRI_PLACES=99, PETRI_TRANSITIONS=33} [2023-08-24 02:25:15,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 02:25:15,444 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 33 transitions, 187 flow [2023-08-24 02:25:15,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.857142857142854) internal successors, (1110), 21 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 02:25:15,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:15,445 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:15,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 02:25:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:15,650 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:15,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:15,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1298039815, now seen corresponding path program 16 times [2023-08-24 02:25:15,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:15,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746643832] [2023-08-24 02:25:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:15,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:15,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746643832] [2023-08-24 02:25:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746643832] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419339472] [2023-08-24 02:25:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:15,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:15,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:15,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 02:25:15,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:15,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:15,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 02:25:15,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:16,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:25:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419339472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:16,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 02:25:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353120289] [2023-08-24 02:25:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 02:25:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 02:25:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:25:16,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 02:25:16,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 33 transitions, 187 flow. Second operand has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 0 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 02:25:16,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:16,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 02:25:16,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:16,387 INFO L124 PetriNetUnfolderBase]: 29/88 cut-off events. [2023-08-24 02:25:16,388 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 02:25:16,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 88 events. 29/88 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 4/92 useless extension candidates. Maximal degree in co-relation 312. Up to 22 conditions per place. [2023-08-24 02:25:16,388 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-24 02:25:16,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 47 transitions, 308 flow [2023-08-24 02:25:16,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 02:25:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 02:25:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 879 transitions. [2023-08-24 02:25:16,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37088607594936707 [2023-08-24 02:25:16,389 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 879 transitions. [2023-08-24 02:25:16,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 879 transitions. [2023-08-24 02:25:16,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:16,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 879 transitions. [2023-08-24 02:25:16,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.6) internal successors, (879), 15 states have internal predecessors, (879), 0 states have call successors, (0), 0 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 02:25:16,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 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 02:25:16,392 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 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 02:25:16,392 INFO L175 Difference]: Start difference. First operand has 99 places, 33 transitions, 187 flow. Second operand 15 states and 879 transitions. [2023-08-24 02:25:16,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 47 transitions, 308 flow [2023-08-24 02:25:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 47 transitions, 249 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-24 02:25:16,393 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-24 02:25:16,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-08-24 02:25:16,393 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-24 02:25:16,394 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-24 02:25:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 0 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 02:25:16,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 02:25:16,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 02:25:16,396 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 02:25:16,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 02:25:16,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:16,602 INFO L445 BasicCegarLoop]: Path program histogram: [20, 16, 6] [2023-08-24 02:25:16,604 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 02:25:16,604 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 02:25:16,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:25:16 BasicIcfg [2023-08-24 02:25:16,607 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 02:25:16,607 INFO L158 Benchmark]: Toolchain (without parser) took 58653.24ms. Allocated memory was 364.9MB in the beginning and 557.8MB in the end (delta: 192.9MB). Free memory was 340.4MB in the beginning and 505.0MB in the end (delta: -164.6MB). Peak memory consumption was 30.5MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,607 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 364.9MB. Free memory is still 341.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:25:16,607 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.73ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 329.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,608 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.99ms. Allocated memory is still 364.9MB. Free memory was 329.7MB in the beginning and 328.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,608 INFO L158 Benchmark]: Boogie Preprocessor took 39.89ms. Allocated memory is still 364.9MB. Free memory was 328.1MB in the beginning and 326.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,608 INFO L158 Benchmark]: RCFGBuilder took 355.84ms. Allocated memory is still 364.9MB. Free memory was 326.6MB in the beginning and 312.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,608 INFO L158 Benchmark]: TraceAbstraction took 58000.68ms. Allocated memory was 364.9MB in the beginning and 557.8MB in the end (delta: 192.9MB). Free memory was 311.3MB in the beginning and 505.0MB in the end (delta: -193.6MB). Peak memory consumption was 1.1MB. Max. memory is 16.0GB. [2023-08-24 02:25:16,609 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50ms. Allocated memory is still 364.9MB. Free memory is still 341.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 214.73ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 329.7MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.99ms. Allocated memory is still 364.9MB. Free memory was 329.7MB in the beginning and 328.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.89ms. Allocated memory is still 364.9MB. Free memory was 328.1MB in the beginning and 326.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 355.84ms. Allocated memory is still 364.9MB. Free memory was 326.6MB in the beginning and 312.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 58000.68ms. Allocated memory was 364.9MB in the beginning and 557.8MB in the end (delta: 192.9MB). Free memory was 311.3MB in the beginning and 505.0MB in the end (delta: -193.6MB). Peak memory consumption was 1.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 77 PlacesBefore, 20 PlacesAfterwards, 76 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 72 TotalNumberOfCompositions, 611 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 593, independent: 590, independent conditional: 0, independent unconditional: 590, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 309, independent: 307, independent conditional: 0, independent unconditional: 307, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 593, independent: 283, independent conditional: 0, independent unconditional: 283, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 309, unknown conditional: 0, unknown unconditional: 309] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: 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, 103 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: 57.9s, OverallIterations: 42, TraceHistogramMax: 3, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3011 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3011 mSDsluCounter, 724 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 569 mSDsCounter, 756 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18860 IncrementalHoareTripleChecker+Invalid, 19616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 756 mSolverCounterUnsat, 155 mSDtfsCounter, 18860 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1799 GetRequests, 570 SyntacticMatches, 58 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11236 ImplicationChecksByTransitivity, 18.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3666occurred in iteration=26, InterpolantAutomatonStates: 856, 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: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 19.7s InterpolantComputationTime, 1196 NumberOfCodeBlocks, 1196 NumberOfCodeBlocksAsserted, 116 NumberOfCheckSat, 1641 ConstructedInterpolants, 0 QuantifiedInterpolants, 22371 SizeOfPredicates, 74 NumberOfNonLiveVariables, 4551 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 114 InterpolantComputations, 6 PerfectInterpolantSequences, 21/429 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 02:25:16,623 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...