/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 12:37:14,822 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 12:37:14,873 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-NoLbe.epf [2023-11-10 12:37:14,894 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 12:37:14,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 12:37:14,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 12:37:14,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 12:37:14,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 12:37:14,896 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 12:37:14,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 12:37:14,897 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 12:37:14,897 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 12:37:14,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 12:37:14,898 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 12:37:14,898 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 12:37:14,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 12:37:14,899 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 12:37:14,899 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 12:37:14,899 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 12:37:14,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 12:37:14,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 12:37:14,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 12:37:14,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 12:37:14,901 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 12:37:14,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 12:37:14,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 12:37:14,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 12:37:14,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 12:37:14,902 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 12:37:14,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 12:37:14,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 12:37:14,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 12:37:14,903 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 12:37:14,903 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 12:37:15,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 12:37:15,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 12:37:15,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 12:37:15,092 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 12:37:15,093 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 12:37:15,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-10 12:37:16,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 12:37:16,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 12:37:16,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-10 12:37:16,434 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbd48dd9/c7e327616d3a4c6c96e192442584a0e2/FLAGf79c1ca3d [2023-11-10 12:37:16,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdbd48dd9/c7e327616d3a4c6c96e192442584a0e2 [2023-11-10 12:37:16,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 12:37:16,451 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 12:37:16,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 12:37:16,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 12:37:16,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 12:37:16,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18348679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16, skipping insertion in model container [2023-11-10 12:37:16,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,483 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 12:37:16,631 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-11-10 12:37:16,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 12:37:16,643 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 12:37:16,664 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-11-10 12:37:16,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 12:37:16,674 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-10 12:37:16,675 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-10 12:37:16,681 INFO L206 MainTranslator]: Completed translation [2023-11-10 12:37:16,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16 WrapperNode [2023-11-10 12:37:16,681 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 12:37:16,682 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 12:37:16,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 12:37:16,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 12:37:16,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,693 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,707 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2023-11-10 12:37:16,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 12:37:16,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 12:37:16,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 12:37:16,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 12:37:16,714 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,714 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,721 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,721 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,728 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,729 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 12:37:16,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 12:37:16,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 12:37:16,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 12:37:16,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (1/1) ... [2023-11-10 12:37:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 12:37:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:16,758 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-10 12:37:16,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-10 12:37:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 12:37:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-10 12:37:16,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-10 12:37:16,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-10 12:37:16,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-10 12:37:16,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 12:37:16,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 12:37:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 12:37:16,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 12:37:16,786 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-10 12:37:16,855 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 12:37:16,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 12:37:16,990 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 12:37:17,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 12:37:17,039 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-10 12:37:17,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:37:17 BoogieIcfgContainer [2023-11-10 12:37:17,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 12:37:17,044 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 12:37:17,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 12:37:17,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 12:37:17,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:37:16" (1/3) ... [2023-11-10 12:37:17,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559ac90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:37:17, skipping insertion in model container [2023-11-10 12:37:17,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:37:16" (2/3) ... [2023-11-10 12:37:17,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2559ac90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:37:17, skipping insertion in model container [2023-11-10 12:37:17,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:37:17" (3/3) ... [2023-11-10 12:37:17,050 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-10 12:37:17,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 12:37:17,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 12:37:17,062 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 12:37:17,119 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 12:37:17,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 184 flow [2023-11-10 12:37:17,198 INFO L124 PetriNetUnfolderBase]: 6/83 cut-off events. [2023-11-10 12:37:17,198 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-10 12:37:17,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 83 events. 6/83 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-11-10 12:37:17,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 184 flow [2023-11-10 12:37:17,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 160 flow [2023-11-10 12:37:17,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 12:37:17,221 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6bb9876e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 12:37:17,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-10 12:37:17,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 12:37:17,242 INFO L124 PetriNetUnfolderBase]: 6/73 cut-off events. [2023-11-10 12:37:17,242 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-10 12:37:17,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:17,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:17,244 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:17,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1304701396, now seen corresponding path program 1 times [2023-11-10 12:37:17,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:17,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029335960] [2023-11-10 12:37:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:17,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:17,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029335960] [2023-11-10 12:37:17,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029335960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:37:17,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 12:37:17,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-10 12:37:17,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887050825] [2023-11-10 12:37:17,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:37:17,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-10 12:37:17,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:17,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-10 12:37:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-10 12:37:17,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 85 [2023-11-10 12:37:17,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:17,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:17,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 85 [2023-11-10 12:37:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:18,065 INFO L124 PetriNetUnfolderBase]: 27/120 cut-off events. [2023-11-10 12:37:18,066 INFO L125 PetriNetUnfolderBase]: For 42/43 co-relation queries the response was YES. [2023-11-10 12:37:18,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 120 events. 27/120 cut-off events. For 42/43 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 255 event pairs, 7 based on Foata normal form. 14/118 useless extension candidates. Maximal degree in co-relation 121. Up to 43 conditions per place. [2023-11-10 12:37:18,069 INFO L140 encePairwiseOnDemand]: 75/85 looper letters, 22 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2023-11-10 12:37:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 221 flow [2023-11-10 12:37:18,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-10 12:37:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-10 12:37:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2023-11-10 12:37:18,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7176470588235294 [2023-11-10 12:37:18,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2023-11-10 12:37:18,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2023-11-10 12:37:18,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:18,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2023-11-10 12:37:18,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,102 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,104 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 160 flow. Second operand 6 states and 366 transitions. [2023-11-10 12:37:18,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 221 flow [2023-11-10 12:37:18,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-10 12:37:18,115 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 158 flow [2023-11-10 12:37:18,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-11-10 12:37:18,121 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-11-10 12:37:18,122 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 158 flow [2023-11-10 12:37:18,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.333333333333336) internal successors, (350), 6 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:18,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 12:37:18,124 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:18,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1085726217, now seen corresponding path program 1 times [2023-11-10 12:37:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:18,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273737536] [2023-11-10 12:37:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:18,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:18,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:18,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273737536] [2023-11-10 12:37:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273737536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172268339] [2023-11-10 12:37:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:18,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:18,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:18,325 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) [2023-11-10 12:37:18,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-10 12:37:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:18,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 12:37:18,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:18,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:18,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172268339] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:18,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:18,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-10 12:37:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318569658] [2023-11-10 12:37:18,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:18,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-10 12:37:18,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:18,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-10 12:37:18,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-10 12:37:18,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 85 [2023-11-10 12:37:18,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:18,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 85 [2023-11-10 12:37:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:18,867 INFO L124 PetriNetUnfolderBase]: 27/150 cut-off events. [2023-11-10 12:37:18,868 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2023-11-10 12:37:18,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 150 events. 27/150 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 425 event pairs, 3 based on Foata normal form. 5/143 useless extension candidates. Maximal degree in co-relation 92. Up to 25 conditions per place. [2023-11-10 12:37:18,869 INFO L140 encePairwiseOnDemand]: 80/85 looper letters, 19 selfloop transitions, 7 changer transitions 2/82 dead transitions. [2023-11-10 12:37:18,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 82 transitions, 252 flow [2023-11-10 12:37:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-10 12:37:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-10 12:37:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 358 transitions. [2023-11-10 12:37:18,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8423529411764706 [2023-11-10 12:37:18,875 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 358 transitions. [2023-11-10 12:37:18,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 358 transitions. [2023-11-10 12:37:18,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:18,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 358 transitions. [2023-11-10 12:37:18,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.6) internal successors, (358), 5 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,880 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 158 flow. Second operand 5 states and 358 transitions. [2023-11-10 12:37:18,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 82 transitions, 252 flow [2023-11-10 12:37:18,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 242 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-10 12:37:18,884 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 210 flow [2023-11-10 12:37:18,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2023-11-10 12:37:18,886 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 4 predicate places. [2023-11-10 12:37:18,886 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 210 flow [2023-11-10 12:37:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.0) internal successors, (552), 8 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:18,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:18,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:18,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:19,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:19,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:19,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -174362226, now seen corresponding path program 1 times [2023-11-10 12:37:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066523714] [2023-11-10 12:37:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:19,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:19,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066523714] [2023-11-10 12:37:19,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066523714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:19,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842716417] [2023-11-10 12:37:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:19,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:19,601 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) [2023-11-10 12:37:19,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-10 12:37:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:19,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:19,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:19,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842716417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:20,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:20,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:37:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693979239] [2023-11-10 12:37:20,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:37:20,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:20,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:37:20,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:37:20,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:20,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 210 flow. Second operand has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:20,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:20,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:20,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:22,704 INFO L124 PetriNetUnfolderBase]: 308/895 cut-off events. [2023-11-10 12:37:22,704 INFO L125 PetriNetUnfolderBase]: For 730/730 co-relation queries the response was YES. [2023-11-10 12:37:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 895 events. 308/895 cut-off events. For 730/730 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5049 event pairs, 28 based on Foata normal form. 4/849 useless extension candidates. Maximal degree in co-relation 1861. Up to 162 conditions per place. [2023-11-10 12:37:22,712 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 142 selfloop transitions, 117 changer transitions 66/360 dead transitions. [2023-11-10 12:37:22,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 360 transitions, 2072 flow [2023-11-10 12:37:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-10 12:37:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-11-10 12:37:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3497 transitions. [2023-11-10 12:37:22,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5794531897265949 [2023-11-10 12:37:22,722 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3497 transitions. [2023-11-10 12:37:22,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3497 transitions. [2023-11-10 12:37:22,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:22,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3497 transitions. [2023-11-10 12:37:22,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 49.25352112676056) internal successors, (3497), 71 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:22,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 85.0) internal successors, (6120), 72 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:22,748 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 85.0) internal successors, (6120), 72 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:22,748 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 210 flow. Second operand 71 states and 3497 transitions. [2023-11-10 12:37:22,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 360 transitions, 2072 flow [2023-11-10 12:37:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 360 transitions, 2072 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 12:37:22,762 INFO L231 Difference]: Finished difference. Result has 188 places, 217 transitions, 1432 flow [2023-11-10 12:37:22,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=1432, PETRI_PLACES=188, PETRI_TRANSITIONS=217} [2023-11-10 12:37:22,764 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 113 predicate places. [2023-11-10 12:37:22,764 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 217 transitions, 1432 flow [2023-11-10 12:37:22,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:22,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:22,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:22,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:22,972 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,SelfDestructingSolverStorable2 [2023-11-10 12:37:22,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:22,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash 423150978, now seen corresponding path program 2 times [2023-11-10 12:37:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43913550] [2023-11-10 12:37:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:23,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:23,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43913550] [2023-11-10 12:37:23,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43913550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122415724] [2023-11-10 12:37:23,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:37:23,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:23,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:23,295 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) [2023-11-10 12:37:23,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-10 12:37:23,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:37:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:23,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-10 12:37:23,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:23,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122415724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:24,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2023-11-10 12:37:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374799881] [2023-11-10 12:37:24,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:24,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-10 12:37:24,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:24,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-10 12:37:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2023-11-10 12:37:24,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:24,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 217 transitions, 1432 flow. Second operand has 37 states, 37 states have (on average 47.16216216216216) internal successors, (1745), 37 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:24,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:24,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:26,030 INFO L124 PetriNetUnfolderBase]: 431/1294 cut-off events. [2023-11-10 12:37:26,031 INFO L125 PetriNetUnfolderBase]: For 9836/9836 co-relation queries the response was YES. [2023-11-10 12:37:26,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6202 conditions, 1294 events. 431/1294 cut-off events. For 9836/9836 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 8598 event pairs, 24 based on Foata normal form. 12/1299 useless extension candidates. Maximal degree in co-relation 6066. Up to 274 conditions per place. [2023-11-10 12:37:26,049 INFO L140 encePairwiseOnDemand]: 64/85 looper letters, 189 selfloop transitions, 225 changer transitions 45/494 dead transitions. [2023-11-10 12:37:26,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 494 transitions, 4996 flow [2023-11-10 12:37:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-10 12:37:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-10 12:37:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1963 transitions. [2023-11-10 12:37:26,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592156862745098 [2023-11-10 12:37:26,054 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1963 transitions. [2023-11-10 12:37:26,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1963 transitions. [2023-11-10 12:37:26,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:26,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1963 transitions. [2023-11-10 12:37:26,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 50.333333333333336) internal successors, (1963), 39 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:26,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 85.0) internal successors, (3400), 40 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:26,068 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 85.0) internal successors, (3400), 40 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:26,068 INFO L175 Difference]: Start difference. First operand has 188 places, 217 transitions, 1432 flow. Second operand 39 states and 1963 transitions. [2023-11-10 12:37:26,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 494 transitions, 4996 flow [2023-11-10 12:37:26,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 494 transitions, 4542 flow, removed 221 selfloop flow, removed 16 redundant places. [2023-11-10 12:37:26,144 INFO L231 Difference]: Finished difference. Result has 217 places, 375 transitions, 3676 flow [2023-11-10 12:37:26,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3676, PETRI_PLACES=217, PETRI_TRANSITIONS=375} [2023-11-10 12:37:26,149 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 142 predicate places. [2023-11-10 12:37:26,152 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 375 transitions, 3676 flow [2023-11-10 12:37:26,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 47.16216216216216) internal successors, (1745), 37 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:26,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:26,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:26,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:26,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:26,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:26,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:26,368 INFO L85 PathProgramCache]: Analyzing trace with hash -447465012, now seen corresponding path program 3 times [2023-11-10 12:37:26,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:26,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506683028] [2023-11-10 12:37:26,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:26,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506683028] [2023-11-10 12:37:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506683028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271788263] [2023-11-10 12:37:26,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:37:26,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:26,758 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) [2023-11-10 12:37:26,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-10 12:37:26,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-10 12:37:26,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:26,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:26,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:27,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:27,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271788263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:27,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:27,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398399530] [2023-11-10 12:37:27,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:27,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:27,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:27,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:27,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 375 transitions, 3676 flow. Second operand has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:27,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:27,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:27,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:30,562 INFO L124 PetriNetUnfolderBase]: 562/1687 cut-off events. [2023-11-10 12:37:30,563 INFO L125 PetriNetUnfolderBase]: For 17647/17647 co-relation queries the response was YES. [2023-11-10 12:37:30,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9369 conditions, 1687 events. 562/1687 cut-off events. For 17647/17647 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12309 event pairs, 16 based on Foata normal form. 4/1686 useless extension candidates. Maximal degree in co-relation 9225. Up to 344 conditions per place. [2023-11-10 12:37:30,584 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 182 selfloop transitions, 449 changer transitions 38/704 dead transitions. [2023-11-10 12:37:30,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 704 transitions, 8847 flow [2023-11-10 12:37:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-10 12:37:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2023-11-10 12:37:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 4445 transitions. [2023-11-10 12:37:30,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746606334841629 [2023-11-10 12:37:30,633 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 4445 transitions. [2023-11-10 12:37:30,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 4445 transitions. [2023-11-10 12:37:30,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:30,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 4445 transitions. [2023-11-10 12:37:30,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 48.84615384615385) internal successors, (4445), 91 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:30,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 85.0) internal successors, (7820), 92 states have internal predecessors, (7820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:30,663 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 85.0) internal successors, (7820), 92 states have internal predecessors, (7820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:30,663 INFO L175 Difference]: Start difference. First operand has 217 places, 375 transitions, 3676 flow. Second operand 91 states and 4445 transitions. [2023-11-10 12:37:30,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 704 transitions, 8847 flow [2023-11-10 12:37:30,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 704 transitions, 8409 flow, removed 211 selfloop flow, removed 14 redundant places. [2023-11-10 12:37:30,762 INFO L231 Difference]: Finished difference. Result has 314 places, 584 transitions, 7268 flow [2023-11-10 12:37:30,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=7268, PETRI_PLACES=314, PETRI_TRANSITIONS=584} [2023-11-10 12:37:30,764 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 239 predicate places. [2023-11-10 12:37:30,764 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 584 transitions, 7268 flow [2023-11-10 12:37:30,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:30,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:30,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:30,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-10 12:37:30,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:30,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:30,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash 622732148, now seen corresponding path program 4 times [2023-11-10 12:37:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:30,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832820972] [2023-11-10 12:37:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:30,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:31,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:31,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832820972] [2023-11-10 12:37:31,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832820972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:31,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175853961] [2023-11-10 12:37:31,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:37:31,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:31,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:31,298 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) [2023-11-10 12:37:31,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-10 12:37:31,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:37:31,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:31,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:31,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:31,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:32,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175853961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:32,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:32,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409380188] [2023-11-10 12:37:32,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:32,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:32,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:32,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:32,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 584 transitions, 7268 flow. Second operand has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:32,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:32,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:32,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:34,696 INFO L124 PetriNetUnfolderBase]: 556/1686 cut-off events. [2023-11-10 12:37:34,696 INFO L125 PetriNetUnfolderBase]: For 20953/20953 co-relation queries the response was YES. [2023-11-10 12:37:34,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10614 conditions, 1686 events. 556/1686 cut-off events. For 20953/20953 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12342 event pairs, 13 based on Foata normal form. 3/1686 useless extension candidates. Maximal degree in co-relation 10428. Up to 350 conditions per place. [2023-11-10 12:37:34,720 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 186 selfloop transitions, 425 changer transitions 64/710 dead transitions. [2023-11-10 12:37:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 710 transitions, 10129 flow [2023-11-10 12:37:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-10 12:37:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-11-10 12:37:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 4113 transitions. [2023-11-10 12:37:34,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760504201680672 [2023-11-10 12:37:34,726 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 4113 transitions. [2023-11-10 12:37:34,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 4113 transitions. [2023-11-10 12:37:34,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:34,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 4113 transitions. [2023-11-10 12:37:34,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 48.964285714285715) internal successors, (4113), 84 states have internal predecessors, (4113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:34,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 85.0) internal successors, (7225), 85 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:34,743 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 85.0) internal successors, (7225), 85 states have internal predecessors, (7225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:34,743 INFO L175 Difference]: Start difference. First operand has 314 places, 584 transitions, 7268 flow. Second operand 84 states and 4113 transitions. [2023-11-10 12:37:34,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 710 transitions, 10129 flow [2023-11-10 12:37:34,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 710 transitions, 8693 flow, removed 466 selfloop flow, removed 30 redundant places. [2023-11-10 12:37:34,911 INFO L231 Difference]: Finished difference. Result has 364 places, 567 transitions, 6804 flow [2023-11-10 12:37:34,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=423, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=6804, PETRI_PLACES=364, PETRI_TRANSITIONS=567} [2023-11-10 12:37:34,915 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 289 predicate places. [2023-11-10 12:37:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 567 transitions, 6804 flow [2023-11-10 12:37:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:34,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:34,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:34,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:35,117 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:35,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash -701274342, now seen corresponding path program 5 times [2023-11-10 12:37:35,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:35,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565565389] [2023-11-10 12:37:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565565389] [2023-11-10 12:37:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565565389] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481729419] [2023-11-10 12:37:35,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-10 12:37:35,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:35,422 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) [2023-11-10 12:37:35,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-10 12:37:35,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-10 12:37:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:35,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:35,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:35,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481729419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:36,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:36,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:36,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769015505] [2023-11-10 12:37:36,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:36,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:36,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:36,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:36,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:36,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 567 transitions, 6804 flow. Second operand has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:37:36,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:36,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:38,550 INFO L124 PetriNetUnfolderBase]: 698/2053 cut-off events. [2023-11-10 12:37:38,550 INFO L125 PetriNetUnfolderBase]: For 23475/23475 co-relation queries the response was YES. [2023-11-10 12:37:38,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12740 conditions, 2053 events. 698/2053 cut-off events. For 23475/23475 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15404 event pairs, 26 based on Foata normal form. 3/2051 useless extension candidates. Maximal degree in co-relation 12562. Up to 454 conditions per place. [2023-11-10 12:37:38,577 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 282 selfloop transitions, 514 changer transitions 25/856 dead transitions. [2023-11-10 12:37:38,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 856 transitions, 12275 flow [2023-11-10 12:37:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-10 12:37:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-10 12:37:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 3883 transitions. [2023-11-10 12:37:38,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782576321667907 [2023-11-10 12:37:38,582 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 3883 transitions. [2023-11-10 12:37:38,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 3883 transitions. [2023-11-10 12:37:38,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:38,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 3883 transitions. [2023-11-10 12:37:38,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 49.151898734177216) internal successors, (3883), 79 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:38,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 85.0) internal successors, (6800), 80 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:38,599 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 85.0) internal successors, (6800), 80 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:38,600 INFO L175 Difference]: Start difference. First operand has 364 places, 567 transitions, 6804 flow. Second operand 79 states and 3883 transitions. [2023-11-10 12:37:38,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 856 transitions, 12275 flow [2023-11-10 12:37:38,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 856 transitions, 11169 flow, removed 105 selfloop flow, removed 71 redundant places. [2023-11-10 12:37:38,756 INFO L231 Difference]: Finished difference. Result has 369 places, 706 transitions, 9234 flow [2023-11-10 12:37:38,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=9234, PETRI_PLACES=369, PETRI_TRANSITIONS=706} [2023-11-10 12:37:38,758 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 294 predicate places. [2023-11-10 12:37:38,758 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 706 transitions, 9234 flow [2023-11-10 12:37:38,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:37:38,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:38,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:38,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-10 12:37:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:38,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:38,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1813129810, now seen corresponding path program 6 times [2023-11-10 12:37:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65469879] [2023-11-10 12:37:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65469879] [2023-11-10 12:37:39,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65469879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491534446] [2023-11-10 12:37:39,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-10 12:37:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:39,289 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) [2023-11-10 12:37:39,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-10 12:37:39,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-10 12:37:39,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:39,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:39,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:39,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491534446] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:40,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:40,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685380548] [2023-11-10 12:37:40,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:40,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:40,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:40,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:40,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 706 transitions, 9234 flow. Second operand has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:40,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:40,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:40,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:41,885 INFO L124 PetriNetUnfolderBase]: 920/2666 cut-off events. [2023-11-10 12:37:41,885 INFO L125 PetriNetUnfolderBase]: For 38072/38072 co-relation queries the response was YES. [2023-11-10 12:37:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17955 conditions, 2666 events. 920/2666 cut-off events. For 38072/38072 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 21504 event pairs, 60 based on Foata normal form. 2/2662 useless extension candidates. Maximal degree in co-relation 17734. Up to 1006 conditions per place. [2023-11-10 12:37:41,979 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 347 selfloop transitions, 686 changer transitions 21/1089 dead transitions. [2023-11-10 12:37:41,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1089 transitions, 16998 flow [2023-11-10 12:37:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-10 12:37:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-10 12:37:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 2839 transitions. [2023-11-10 12:37:41,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758620689655173 [2023-11-10 12:37:41,991 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 2839 transitions. [2023-11-10 12:37:41,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 2839 transitions. [2023-11-10 12:37:41,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:41,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 2839 transitions. [2023-11-10 12:37:41,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 48.94827586206897) internal successors, (2839), 58 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:42,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 85.0) internal successors, (5015), 59 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:42,005 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 85.0) internal successors, (5015), 59 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:42,005 INFO L175 Difference]: Start difference. First operand has 369 places, 706 transitions, 9234 flow. Second operand 58 states and 2839 transitions. [2023-11-10 12:37:42,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1089 transitions, 16998 flow [2023-11-10 12:37:42,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1089 transitions, 15905 flow, removed 254 selfloop flow, removed 39 redundant places. [2023-11-10 12:37:42,197 INFO L231 Difference]: Finished difference. Result has 398 places, 985 transitions, 15174 flow [2023-11-10 12:37:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=8647, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15174, PETRI_PLACES=398, PETRI_TRANSITIONS=985} [2023-11-10 12:37:42,198 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 323 predicate places. [2023-11-10 12:37:42,198 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 985 transitions, 15174 flow [2023-11-10 12:37:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:42,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:42,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:42,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:42,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:42,405 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:42,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 832765510, now seen corresponding path program 7 times [2023-11-10 12:37:42,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:42,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847195874] [2023-11-10 12:37:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:42,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:42,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847195874] [2023-11-10 12:37:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847195874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229540937] [2023-11-10 12:37:42,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-10 12:37:42,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:42,813 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) [2023-11-10 12:37:42,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-10 12:37:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:42,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:42,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:43,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229540937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:43,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:43,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14584938] [2023-11-10 12:37:43,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:43,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:43,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 985 transitions, 15174 flow. Second operand has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:37:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:43,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:43,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:46,532 INFO L124 PetriNetUnfolderBase]: 1028/3002 cut-off events. [2023-11-10 12:37:46,532 INFO L125 PetriNetUnfolderBase]: For 48183/48183 co-relation queries the response was YES. [2023-11-10 12:37:46,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21662 conditions, 3002 events. 1028/3002 cut-off events. For 48183/48183 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25104 event pairs, 60 based on Foata normal form. 2/2998 useless extension candidates. Maximal degree in co-relation 21435. Up to 1017 conditions per place. [2023-11-10 12:37:46,577 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 346 selfloop transitions, 858 changer transitions 28/1267 dead transitions. [2023-11-10 12:37:46,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1267 transitions, 21966 flow [2023-11-10 12:37:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-10 12:37:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-11-10 12:37:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3541 transitions. [2023-11-10 12:37:46,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785947712418301 [2023-11-10 12:37:46,581 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3541 transitions. [2023-11-10 12:37:46,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3541 transitions. [2023-11-10 12:37:46,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:46,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3541 transitions. [2023-11-10 12:37:46,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 49.18055555555556) internal successors, (3541), 72 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:46,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 85.0) internal successors, (6205), 73 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:46,594 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 85.0) internal successors, (6205), 73 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:46,594 INFO L175 Difference]: Start difference. First operand has 398 places, 985 transitions, 15174 flow. Second operand 72 states and 3541 transitions. [2023-11-10 12:37:46,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1267 transitions, 21966 flow [2023-11-10 12:37:47,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1267 transitions, 21027 flow, removed 376 selfloop flow, removed 23 redundant places. [2023-11-10 12:37:47,090 INFO L231 Difference]: Finished difference. Result has 462 places, 1149 transitions, 19709 flow [2023-11-10 12:37:47,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=14440, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=19709, PETRI_PLACES=462, PETRI_TRANSITIONS=1149} [2023-11-10 12:37:47,092 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 387 predicate places. [2023-11-10 12:37:47,092 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 1149 transitions, 19709 flow [2023-11-10 12:37:47,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:37:47,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:47,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:47,293 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,SelfDestructingSolverStorable8 [2023-11-10 12:37:47,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:47,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:47,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1698061946, now seen corresponding path program 8 times [2023-11-10 12:37:47,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:47,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552351706] [2023-11-10 12:37:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:47,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:47,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552351706] [2023-11-10 12:37:47,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552351706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:47,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037067015] [2023-11-10 12:37:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:37:47,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:47,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:47,604 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) [2023-11-10 12:37:47,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-10 12:37:47,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:37:47,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:47,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:47,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:47,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:48,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037067015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:48,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:48,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:48,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202305891] [2023-11-10 12:37:48,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:48,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:48,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:48,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 1149 transitions, 19709 flow. Second operand has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:48,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:48,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:48,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:50,549 INFO L124 PetriNetUnfolderBase]: 1022/2970 cut-off events. [2023-11-10 12:37:50,549 INFO L125 PetriNetUnfolderBase]: For 52221/52221 co-relation queries the response was YES. [2023-11-10 12:37:50,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22465 conditions, 2970 events. 1022/2970 cut-off events. For 52221/52221 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24798 event pairs, 63 based on Foata normal form. 2/2968 useless extension candidates. Maximal degree in co-relation 22299. Up to 955 conditions per place. [2023-11-10 12:37:50,589 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 402 selfloop transitions, 780 changer transitions 22/1239 dead transitions. [2023-11-10 12:37:50,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1239 transitions, 23276 flow [2023-11-10 12:37:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-10 12:37:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-10 12:37:50,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3129 transitions. [2023-11-10 12:37:50,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5751838235294118 [2023-11-10 12:37:50,592 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3129 transitions. [2023-11-10 12:37:50,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3129 transitions. [2023-11-10 12:37:50,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:50,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3129 transitions. [2023-11-10 12:37:50,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 48.890625) internal successors, (3129), 64 states have internal predecessors, (3129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:50,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 85.0) internal successors, (5525), 65 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:50,603 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 85.0) internal successors, (5525), 65 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:50,603 INFO L175 Difference]: Start difference. First operand has 462 places, 1149 transitions, 19709 flow. Second operand 64 states and 3129 transitions. [2023-11-10 12:37:50,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1239 transitions, 23276 flow [2023-11-10 12:37:51,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1239 transitions, 22390 flow, removed 196 selfloop flow, removed 38 redundant places. [2023-11-10 12:37:51,125 INFO L231 Difference]: Finished difference. Result has 491 places, 1159 transitions, 20931 flow [2023-11-10 12:37:51,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=18860, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=20931, PETRI_PLACES=491, PETRI_TRANSITIONS=1159} [2023-11-10 12:37:51,127 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 416 predicate places. [2023-11-10 12:37:51,127 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1159 transitions, 20931 flow [2023-11-10 12:37:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:51,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:51,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:51,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:51,332 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,SelfDestructingSolverStorable9 [2023-11-10 12:37:51,332 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:51,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1941060406, now seen corresponding path program 9 times [2023-11-10 12:37:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:51,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546701689] [2023-11-10 12:37:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:51,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546701689] [2023-11-10 12:37:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546701689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:51,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254894489] [2023-11-10 12:37:51,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:37:51,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:51,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:51,624 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) [2023-11-10 12:37:51,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-10 12:37:51,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-10 12:37:51,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:51,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:51,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:51,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:52,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254894489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:52,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:52,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:52,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282910018] [2023-11-10 12:37:52,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:52,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:52,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:52,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:52,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:52,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1159 transitions, 20931 flow. Second operand has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:52,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:52,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:52,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:54,410 INFO L124 PetriNetUnfolderBase]: 1133/3306 cut-off events. [2023-11-10 12:37:54,410 INFO L125 PetriNetUnfolderBase]: For 65772/65772 co-relation queries the response was YES. [2023-11-10 12:37:54,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26724 conditions, 3306 events. 1133/3306 cut-off events. For 65772/65772 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28529 event pairs, 68 based on Foata normal form. 2/3302 useless extension candidates. Maximal degree in co-relation 26530. Up to 1502 conditions per place. [2023-11-10 12:37:54,455 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 600 selfloop transitions, 770 changer transitions 21/1426 dead transitions. [2023-11-10 12:37:54,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1426 transitions, 28361 flow [2023-11-10 12:37:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-10 12:37:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-10 12:37:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2403 transitions. [2023-11-10 12:37:54,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769507803121249 [2023-11-10 12:37:54,458 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2403 transitions. [2023-11-10 12:37:54,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2403 transitions. [2023-11-10 12:37:54,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:54,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2403 transitions. [2023-11-10 12:37:54,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 49.04081632653061) internal successors, (2403), 49 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:54,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 85.0) internal successors, (4250), 50 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:54,465 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 85.0) internal successors, (4250), 50 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:54,465 INFO L175 Difference]: Start difference. First operand has 491 places, 1159 transitions, 20931 flow. Second operand 49 states and 2403 transitions. [2023-11-10 12:37:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1426 transitions, 28361 flow [2023-11-10 12:37:55,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1426 transitions, 27773 flow, removed 80 selfloop flow, removed 38 redundant places. [2023-11-10 12:37:55,030 INFO L231 Difference]: Finished difference. Result has 513 places, 1325 transitions, 26562 flow [2023-11-10 12:37:55,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=20472, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=26562, PETRI_PLACES=513, PETRI_TRANSITIONS=1325} [2023-11-10 12:37:55,032 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 438 predicate places. [2023-11-10 12:37:55,033 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 1325 transitions, 26562 flow [2023-11-10 12:37:55,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:55,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:55,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:55,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-10 12:37:55,236 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,SelfDestructingSolverStorable10 [2023-11-10 12:37:55,237 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:55,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -909964700, now seen corresponding path program 10 times [2023-11-10 12:37:55,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:55,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089534863] [2023-11-10 12:37:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089534863] [2023-11-10 12:37:55,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089534863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772639152] [2023-11-10 12:37:55,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:37:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:55,549 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) [2023-11-10 12:37:55,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-10 12:37:55,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:37:55,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:55,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:55,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:55,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772639152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:56,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:56,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416098926] [2023-11-10 12:37:56,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:56,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:56,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:56,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:56,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 1325 transitions, 26562 flow. Second operand has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:56,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:56,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:56,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:37:57,891 INFO L124 PetriNetUnfolderBase]: 1143/3324 cut-off events. [2023-11-10 12:37:57,891 INFO L125 PetriNetUnfolderBase]: For 72764/72764 co-relation queries the response was YES. [2023-11-10 12:37:57,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29094 conditions, 3324 events. 1143/3324 cut-off events. For 72764/72764 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28623 event pairs, 71 based on Foata normal form. 1/3319 useless extension candidates. Maximal degree in co-relation 28845. Up to 1540 conditions per place. [2023-11-10 12:37:57,936 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 619 selfloop transitions, 797 changer transitions 10/1461 dead transitions. [2023-11-10 12:37:57,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1461 transitions, 31771 flow [2023-11-10 12:37:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-10 12:37:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-10 12:37:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1545 transitions. [2023-11-10 12:37:57,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863377609108159 [2023-11-10 12:37:57,938 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1545 transitions. [2023-11-10 12:37:57,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1545 transitions. [2023-11-10 12:37:57,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:37:57,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1545 transitions. [2023-11-10 12:37:57,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 49.83870967741935) internal successors, (1545), 31 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:57,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 85.0) internal successors, (2720), 32 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:57,943 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 85.0) internal successors, (2720), 32 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:57,943 INFO L175 Difference]: Start difference. First operand has 513 places, 1325 transitions, 26562 flow. Second operand 31 states and 1545 transitions. [2023-11-10 12:37:57,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1461 transitions, 31771 flow [2023-11-10 12:37:58,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 1461 transitions, 31329 flow, removed 147 selfloop flow, removed 14 redundant places. [2023-11-10 12:37:58,493 INFO L231 Difference]: Finished difference. Result has 536 places, 1377 transitions, 30314 flow [2023-11-10 12:37:58,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=26176, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=30314, PETRI_PLACES=536, PETRI_TRANSITIONS=1377} [2023-11-10 12:37:58,495 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 461 predicate places. [2023-11-10 12:37:58,495 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1377 transitions, 30314 flow [2023-11-10 12:37:58,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:37:58,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:37:58,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:37:58,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-10 12:37:58,700 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,SelfDestructingSolverStorable11 [2023-11-10 12:37:58,700 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:37:58,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:37:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1266888026, now seen corresponding path program 11 times [2023-11-10 12:37:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:37:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356269109] [2023-11-10 12:37:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:37:58,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:37:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:37:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:37:58,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356269109] [2023-11-10 12:37:58,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356269109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:37:58,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279884401] [2023-11-10 12:37:58,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-10 12:37:58,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:37:58,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:37:58,985 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) [2023-11-10 12:37:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-10 12:37:59,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-10 12:37:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:37:59,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:37:59,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:37:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:59,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:37:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:37:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279884401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:37:59,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:37:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:37:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316184486] [2023-11-10 12:37:59,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:37:59,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:37:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:37:59,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:37:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:37:59,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:37:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1377 transitions, 30314 flow. Second operand has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:37:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:37:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:37:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:02,441 INFO L124 PetriNetUnfolderBase]: 1185/3475 cut-off events. [2023-11-10 12:38:02,442 INFO L125 PetriNetUnfolderBase]: For 85676/85676 co-relation queries the response was YES. [2023-11-10 12:38:02,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32351 conditions, 3475 events. 1185/3475 cut-off events. For 85676/85676 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30380 event pairs, 70 based on Foata normal form. 1/3470 useless extension candidates. Maximal degree in co-relation 32091. Up to 1415 conditions per place. [2023-11-10 12:38:02,487 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 525 selfloop transitions, 985 changer transitions 15/1560 dead transitions. [2023-11-10 12:38:02,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1560 transitions, 36867 flow [2023-11-10 12:38:02,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-10 12:38:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-11-10 12:38:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 2903 transitions. [2023-11-10 12:38:02,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578863409770688 [2023-11-10 12:38:02,491 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 2903 transitions. [2023-11-10 12:38:02,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 2903 transitions. [2023-11-10 12:38:02,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:02,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 2903 transitions. [2023-11-10 12:38:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 49.20338983050848) internal successors, (2903), 59 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:02,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 85.0) internal successors, (5100), 60 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:02,500 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 85.0) internal successors, (5100), 60 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:02,500 INFO L175 Difference]: Start difference. First operand has 536 places, 1377 transitions, 30314 flow. Second operand 59 states and 2903 transitions. [2023-11-10 12:38:02,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1560 transitions, 36867 flow [2023-11-10 12:38:03,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1560 transitions, 36510 flow, removed 73 selfloop flow, removed 14 redundant places. [2023-11-10 12:38:03,305 INFO L231 Difference]: Finished difference. Result has 593 places, 1450 transitions, 34059 flow [2023-11-10 12:38:03,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=30018, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=913, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=34059, PETRI_PLACES=593, PETRI_TRANSITIONS=1450} [2023-11-10 12:38:03,306 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 518 predicate places. [2023-11-10 12:38:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 1450 transitions, 34059 flow [2023-11-10 12:38:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:38:03,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:03,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:03,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:03,507 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,SelfDestructingSolverStorable12 [2023-11-10 12:38:03,508 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:03,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:03,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1926270224, now seen corresponding path program 12 times [2023-11-10 12:38:03,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:03,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055831186] [2023-11-10 12:38:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:03,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:03,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:03,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055831186] [2023-11-10 12:38:03,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055831186] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:03,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246152787] [2023-11-10 12:38:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-10 12:38:03,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:03,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:03,773 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) [2023-11-10 12:38:03,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-10 12:38:03,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-10 12:38:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:03,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:03,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:04,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:04,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246152787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:04,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:04,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:38:04,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985241029] [2023-11-10 12:38:04,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:04,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:38:04,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:38:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:38:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:04,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 1450 transitions, 34059 flow. Second operand has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:38:04,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:04,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:04,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:06,595 INFO L124 PetriNetUnfolderBase]: 1204/3512 cut-off events. [2023-11-10 12:38:06,595 INFO L125 PetriNetUnfolderBase]: For 98231/98231 co-relation queries the response was YES. [2023-11-10 12:38:06,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34713 conditions, 3512 events. 1204/3512 cut-off events. For 98231/98231 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30694 event pairs, 69 based on Foata normal form. 1/3505 useless extension candidates. Maximal degree in co-relation 34439. Up to 1534 conditions per place. [2023-11-10 12:38:06,646 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 647 selfloop transitions, 898 changer transitions 10/1590 dead transitions. [2023-11-10 12:38:06,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1590 transitions, 39883 flow [2023-11-10 12:38:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-10 12:38:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-10 12:38:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2021 transitions. [2023-11-10 12:38:06,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799139167862267 [2023-11-10 12:38:06,655 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2021 transitions. [2023-11-10 12:38:06,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2021 transitions. [2023-11-10 12:38:06,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:06,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2021 transitions. [2023-11-10 12:38:06,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 49.292682926829265) internal successors, (2021), 41 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:06,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 85.0) internal successors, (3570), 42 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:06,663 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 85.0) internal successors, (3570), 42 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:06,663 INFO L175 Difference]: Start difference. First operand has 593 places, 1450 transitions, 34059 flow. Second operand 41 states and 2021 transitions. [2023-11-10 12:38:06,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1590 transitions, 39883 flow [2023-11-10 12:38:07,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1590 transitions, 38982 flow, removed 192 selfloop flow, removed 23 redundant places. [2023-11-10 12:38:07,720 INFO L231 Difference]: Finished difference. Result has 623 places, 1514 transitions, 37855 flow [2023-11-10 12:38:07,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=33209, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=836, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=37855, PETRI_PLACES=623, PETRI_TRANSITIONS=1514} [2023-11-10 12:38:07,722 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 548 predicate places. [2023-11-10 12:38:07,722 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 1514 transitions, 37855 flow [2023-11-10 12:38:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.09090909090909) internal successors, (1554), 33 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) [2023-11-10 12:38:07,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:07,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:07,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:07,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-10 12:38:07,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:07,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1004110692, now seen corresponding path program 13 times [2023-11-10 12:38:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288733529] [2023-11-10 12:38:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:08,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288733529] [2023-11-10 12:38:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288733529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873462648] [2023-11-10 12:38:08,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-10 12:38:08,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:08,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:08,210 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) [2023-11-10 12:38:08,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-10 12:38:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:08,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:08,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:08,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873462648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:08,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:08,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:38:08,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754759266] [2023-11-10 12:38:08,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:38:08,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:38:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:38:08,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:08,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 1514 transitions, 37855 flow. Second operand has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:08,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:08,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:08,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:11,668 INFO L124 PetriNetUnfolderBase]: 1231/3606 cut-off events. [2023-11-10 12:38:11,668 INFO L125 PetriNetUnfolderBase]: For 114427/114427 co-relation queries the response was YES. [2023-11-10 12:38:11,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37604 conditions, 3606 events. 1231/3606 cut-off events. For 114427/114427 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31836 event pairs, 69 based on Foata normal form. 1/3599 useless extension candidates. Maximal degree in co-relation 37314. Up to 1435 conditions per place. [2023-11-10 12:38:11,727 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 557 selfloop transitions, 1046 changer transitions 15/1653 dead transitions. [2023-11-10 12:38:11,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 671 places, 1653 transitions, 44026 flow [2023-11-10 12:38:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-10 12:38:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-11-10 12:38:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2610 transitions. [2023-11-10 12:38:11,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793562708102109 [2023-11-10 12:38:11,729 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2610 transitions. [2023-11-10 12:38:11,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2610 transitions. [2023-11-10 12:38:11,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:11,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2610 transitions. [2023-11-10 12:38:11,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 49.24528301886792) internal successors, (2610), 53 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:11,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 85.0) internal successors, (4590), 54 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:11,739 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 85.0) internal successors, (4590), 54 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:11,739 INFO L175 Difference]: Start difference. First operand has 623 places, 1514 transitions, 37855 flow. Second operand 53 states and 2610 transitions. [2023-11-10 12:38:11,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 671 places, 1653 transitions, 44026 flow [2023-11-10 12:38:12,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 655 places, 1653 transitions, 43751 flow, removed 66 selfloop flow, removed 16 redundant places. [2023-11-10 12:38:12,813 INFO L231 Difference]: Finished difference. Result has 668 places, 1556 transitions, 41354 flow [2023-11-10 12:38:12,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=37616, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=41354, PETRI_PLACES=668, PETRI_TRANSITIONS=1556} [2023-11-10 12:38:12,815 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 593 predicate places. [2023-11-10 12:38:12,815 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 1556 transitions, 41354 flow [2023-11-10 12:38:12,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.06060606060606) internal successors, (1553), 33 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:12,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:12,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:12,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-10 12:38:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:13,017 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:13,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1941130996, now seen corresponding path program 14 times [2023-11-10 12:38:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:13,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918886375] [2023-11-10 12:38:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:13,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918886375] [2023-11-10 12:38:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918886375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358580239] [2023-11-10 12:38:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:38:13,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:13,312 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) [2023-11-10 12:38:13,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-10 12:38:13,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:38:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:13,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:13,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:13,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358580239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:13,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:13,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:38:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807290194] [2023-11-10 12:38:13,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:13,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:38:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:38:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:38:13,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:13,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1556 transitions, 41354 flow. Second operand has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:13,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:13,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:16,725 INFO L124 PetriNetUnfolderBase]: 1228/3578 cut-off events. [2023-11-10 12:38:16,725 INFO L125 PetriNetUnfolderBase]: For 128122/128122 co-relation queries the response was YES. [2023-11-10 12:38:16,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39368 conditions, 3578 events. 1228/3578 cut-off events. For 128122/128122 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31464 event pairs, 75 based on Foata normal form. 1/3572 useless extension candidates. Maximal degree in co-relation 39075. Up to 1342 conditions per place. [2023-11-10 12:38:16,773 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 691 selfloop transitions, 897 changer transitions 14/1637 dead transitions. [2023-11-10 12:38:16,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 1637 transitions, 45901 flow [2023-11-10 12:38:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-10 12:38:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-11-10 12:38:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2495 transitions. [2023-11-10 12:38:16,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755478662053056 [2023-11-10 12:38:16,776 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2495 transitions. [2023-11-10 12:38:16,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2495 transitions. [2023-11-10 12:38:16,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:16,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2495 transitions. [2023-11-10 12:38:16,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 48.92156862745098) internal successors, (2495), 51 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:16,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 85.0) internal successors, (4420), 52 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:16,782 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 85.0) internal successors, (4420), 52 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:16,783 INFO L175 Difference]: Start difference. First operand has 668 places, 1556 transitions, 41354 flow. Second operand 51 states and 2495 transitions. [2023-11-10 12:38:16,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 1637 transitions, 45901 flow [2023-11-10 12:38:17,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 1637 transitions, 45090 flow, removed 152 selfloop flow, removed 31 redundant places. [2023-11-10 12:38:17,866 INFO L231 Difference]: Finished difference. Result has 690 places, 1559 transitions, 42602 flow [2023-11-10 12:38:17,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=40557, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=891, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=42602, PETRI_PLACES=690, PETRI_TRANSITIONS=1559} [2023-11-10 12:38:17,867 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 615 predicate places. [2023-11-10 12:38:17,867 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 1559 transitions, 42602 flow [2023-11-10 12:38:17,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.121212121212125) internal successors, (1555), 33 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:17,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:17,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:17,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:18,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-10 12:38:18,068 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:18,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:18,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1482775314, now seen corresponding path program 15 times [2023-11-10 12:38:18,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:18,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790753690] [2023-11-10 12:38:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:18,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:18,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:18,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790753690] [2023-11-10 12:38:18,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790753690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:18,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007682885] [2023-11-10 12:38:18,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:38:18,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:18,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:18,328 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) [2023-11-10 12:38:18,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-10 12:38:18,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-10 12:38:18,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:18,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:18,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:18,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:18,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007682885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:18,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:18,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2023-11-10 12:38:18,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382909497] [2023-11-10 12:38:18,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-10 12:38:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:18,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-10 12:38:18,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-11-10 12:38:18,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:18,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 1559 transitions, 42602 flow. Second operand has 33 states, 33 states have (on average 47.15151515151515) internal successors, (1556), 33 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:18,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:18,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:18,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:21,434 INFO L124 PetriNetUnfolderBase]: 1226/3571 cut-off events. [2023-11-10 12:38:21,434 INFO L125 PetriNetUnfolderBase]: For 136258/136258 co-relation queries the response was YES. [2023-11-10 12:38:21,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40316 conditions, 3571 events. 1226/3571 cut-off events. For 136258/136258 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 31415 event pairs, 73 based on Foata normal form. 1/3566 useless extension candidates. Maximal degree in co-relation 40027. Up to 1391 conditions per place. [2023-11-10 12:38:21,491 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 693 selfloop transitions, 908 changer transitions 14/1650 dead transitions. [2023-11-10 12:38:21,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1650 transitions, 47377 flow [2023-11-10 12:38:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-10 12:38:21,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-10 12:38:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2121 transitions. [2023-11-10 12:38:21,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803009575923392 [2023-11-10 12:38:21,493 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2121 transitions. [2023-11-10 12:38:21,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2121 transitions. [2023-11-10 12:38:21,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:21,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2121 transitions. [2023-11-10 12:38:21,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 49.325581395348834) internal successors, (2121), 43 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:21,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 85.0) internal successors, (3740), 44 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:21,499 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 85.0) internal successors, (3740), 44 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:21,499 INFO L175 Difference]: Start difference. First operand has 690 places, 1559 transitions, 42602 flow. Second operand 43 states and 2121 transitions. [2023-11-10 12:38:21,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1650 transitions, 47377 flow [2023-11-10 12:38:22,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 1650 transitions, 46900 flow, removed 54 selfloop flow, removed 38 redundant places. [2023-11-10 12:38:22,848 INFO L231 Difference]: Finished difference. Result has 693 places, 1566 transitions, 44187 flow [2023-11-10 12:38:22,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=42175, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=44187, PETRI_PLACES=693, PETRI_TRANSITIONS=1566} [2023-11-10 12:38:22,849 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 618 predicate places. [2023-11-10 12:38:22,850 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 1566 transitions, 44187 flow [2023-11-10 12:38:22,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 47.15151515151515) internal successors, (1556), 33 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:22,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:22,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:22,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:23,056 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,SelfDestructingSolverStorable16 [2023-11-10 12:38:23,056 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:23,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:23,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1874310764, now seen corresponding path program 16 times [2023-11-10 12:38:23,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:23,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875586020] [2023-11-10 12:38:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:23,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875586020] [2023-11-10 12:38:23,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875586020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476719122] [2023-11-10 12:38:23,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:38:23,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:23,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:23,346 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) [2023-11-10 12:38:23,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-10 12:38:23,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:38:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:23,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:23,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:23,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476719122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:23,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:38:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917024410] [2023-11-10 12:38:23,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:38:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:38:23,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:38:23,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:23,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 1566 transitions, 44187 flow. Second operand has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:23,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:23,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:23,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:27,742 INFO L124 PetriNetUnfolderBase]: 1597/4748 cut-off events. [2023-11-10 12:38:27,742 INFO L125 PetriNetUnfolderBase]: For 197215/197215 co-relation queries the response was YES. [2023-11-10 12:38:27,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54494 conditions, 4748 events. 1597/4748 cut-off events. For 197215/197215 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 45094 event pairs, 80 based on Foata normal form. 3/4742 useless extension candidates. Maximal degree in co-relation 54162. Up to 1634 conditions per place. [2023-11-10 12:38:27,806 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 819 selfloop transitions, 1250 changer transitions 57/2161 dead transitions. [2023-11-10 12:38:27,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 2161 transitions, 64580 flow [2023-11-10 12:38:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-10 12:38:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-11-10 12:38:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3160 transitions. [2023-11-10 12:38:27,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5808823529411765 [2023-11-10 12:38:27,809 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3160 transitions. [2023-11-10 12:38:27,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3160 transitions. [2023-11-10 12:38:27,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:27,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3160 transitions. [2023-11-10 12:38:27,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 49.375) internal successors, (3160), 64 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) [2023-11-10 12:38:27,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 85.0) internal successors, (5525), 65 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:27,814 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 85.0) internal successors, (5525), 65 states have internal predecessors, (5525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:27,814 INFO L175 Difference]: Start difference. First operand has 693 places, 1566 transitions, 44187 flow. Second operand 64 states and 3160 transitions. [2023-11-10 12:38:27,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 2161 transitions, 64580 flow [2023-11-10 12:38:29,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 721 places, 2161 transitions, 63782 flow, removed 91 selfloop flow, removed 29 redundant places. [2023-11-10 12:38:29,456 INFO L231 Difference]: Finished difference. Result has 759 places, 1967 transitions, 61034 flow [2023-11-10 12:38:29,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=43635, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=61034, PETRI_PLACES=759, PETRI_TRANSITIONS=1967} [2023-11-10 12:38:29,457 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 684 predicate places. [2023-11-10 12:38:29,457 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 1967 transitions, 61034 flow [2023-11-10 12:38:29,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:29,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:29,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:29,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:29,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-10 12:38:29,658 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:29,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:29,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1413349378, now seen corresponding path program 17 times [2023-11-10 12:38:29,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:29,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343018472] [2023-11-10 12:38:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:29,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:29,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343018472] [2023-11-10 12:38:29,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343018472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158358496] [2023-11-10 12:38:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-10 12:38:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:29,889 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) [2023-11-10 12:38:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-10 12:38:29,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:38:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:29,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:29,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:30,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:30,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158358496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:30,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:30,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:38:30,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847908782] [2023-11-10 12:38:30,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:30,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:38:30,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:38:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:38:30,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:30,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 1967 transitions, 61034 flow. Second operand has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:30,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:30,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:30,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:35,222 INFO L124 PetriNetUnfolderBase]: 1594/4753 cut-off events. [2023-11-10 12:38:35,223 INFO L125 PetriNetUnfolderBase]: For 218942/218947 co-relation queries the response was YES. [2023-11-10 12:38:35,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58320 conditions, 4753 events. 1594/4753 cut-off events. For 218942/218947 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 45161 event pairs, 74 based on Foata normal form. 9/4752 useless extension candidates. Maximal degree in co-relation 58023. Up to 1664 conditions per place. [2023-11-10 12:38:35,296 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 811 selfloop transitions, 1292 changer transitions 78/2216 dead transitions. [2023-11-10 12:38:35,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 817 places, 2216 transitions, 71310 flow [2023-11-10 12:38:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-10 12:38:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-10 12:38:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3447 transitions. [2023-11-10 12:38:35,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579327731092437 [2023-11-10 12:38:35,299 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3447 transitions. [2023-11-10 12:38:35,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3447 transitions. [2023-11-10 12:38:35,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:35,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3447 transitions. [2023-11-10 12:38:35,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 49.24285714285714) internal successors, (3447), 70 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:35,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 85.0) internal successors, (6035), 71 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:35,308 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 85.0) internal successors, (6035), 71 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:35,308 INFO L175 Difference]: Start difference. First operand has 759 places, 1967 transitions, 61034 flow. Second operand 70 states and 3447 transitions. [2023-11-10 12:38:35,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 817 places, 2216 transitions, 71310 flow [2023-11-10 12:38:37,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 2216 transitions, 70824 flow, removed 235 selfloop flow, removed 12 redundant places. [2023-11-10 12:38:37,479 INFO L231 Difference]: Finished difference. Result has 822 places, 1983 transitions, 64213 flow [2023-11-10 12:38:37,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=60728, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=722, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=64213, PETRI_PLACES=822, PETRI_TRANSITIONS=1983} [2023-11-10 12:38:37,481 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 747 predicate places. [2023-11-10 12:38:37,481 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 1983 transitions, 64213 flow [2023-11-10 12:38:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:37,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:37,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:37,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:37,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:37,682 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:37,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash -620754864, now seen corresponding path program 18 times [2023-11-10 12:38:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156533491] [2023-11-10 12:38:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:37,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:37,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156533491] [2023-11-10 12:38:37,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156533491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:37,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985255920] [2023-11-10 12:38:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-10 12:38:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:37,973 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) [2023-11-10 12:38:37,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-10 12:38:38,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-10 12:38:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:38,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:38,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:38,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:38,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985255920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:38,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:38,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:38:38,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746122742] [2023-11-10 12:38:38,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:38:38,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:38:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:38:38,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:38,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 1983 transitions, 64213 flow. Second operand has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:38,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:38,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:38,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:42,896 INFO L124 PetriNetUnfolderBase]: 1626/4794 cut-off events. [2023-11-10 12:38:42,897 INFO L125 PetriNetUnfolderBase]: For 242291/242296 co-relation queries the response was YES. [2023-11-10 12:38:42,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61937 conditions, 4794 events. 1626/4794 cut-off events. For 242291/242296 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 45297 event pairs, 99 based on Foata normal form. 5/4792 useless extension candidates. Maximal degree in co-relation 61587. Up to 2388 conditions per place. [2023-11-10 12:38:42,980 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 867 selfloop transitions, 1358 changer transitions 10/2270 dead transitions. [2023-11-10 12:38:42,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 2270 transitions, 76731 flow [2023-11-10 12:38:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-10 12:38:42,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-10 12:38:42,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2355 transitions. [2023-11-10 12:38:42,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772058823529411 [2023-11-10 12:38:42,982 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2355 transitions. [2023-11-10 12:38:42,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2355 transitions. [2023-11-10 12:38:42,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:42,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2355 transitions. [2023-11-10 12:38:42,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 49.0625) internal successors, (2355), 48 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:42,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 85.0) internal successors, (4165), 49 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:42,987 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 85.0) internal successors, (4165), 49 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:42,987 INFO L175 Difference]: Start difference. First operand has 822 places, 1983 transitions, 64213 flow. Second operand 48 states and 2355 transitions. [2023-11-10 12:38:42,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 2270 transitions, 76731 flow [2023-11-10 12:38:45,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 2270 transitions, 74842 flow, removed 128 selfloop flow, removed 56 redundant places. [2023-11-10 12:38:45,423 INFO L231 Difference]: Finished difference. Result has 820 places, 2178 transitions, 73371 flow [2023-11-10 12:38:45,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=62553, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=73371, PETRI_PLACES=820, PETRI_TRANSITIONS=2178} [2023-11-10 12:38:45,426 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 745 predicate places. [2023-11-10 12:38:45,426 INFO L495 AbstractCegarLoop]: Abstraction has has 820 places, 2178 transitions, 73371 flow [2023-11-10 12:38:45,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:45,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:45,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:45,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:45,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:45,632 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:45,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1215077410, now seen corresponding path program 19 times [2023-11-10 12:38:45,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:45,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329198615] [2023-11-10 12:38:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:45,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:45,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329198615] [2023-11-10 12:38:45,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329198615] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:45,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207918426] [2023-11-10 12:38:45,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-10 12:38:45,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:45,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:45,912 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) [2023-11-10 12:38:45,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-10 12:38:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:45,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:45,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:46,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207918426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:46,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:46,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:38:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576647371] [2023-11-10 12:38:46,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:46,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:38:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:38:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:38:46,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:46,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 820 places, 2178 transitions, 73371 flow. Second operand has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:46,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:46,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:46,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:38:52,326 INFO L124 PetriNetUnfolderBase]: 1786/5342 cut-off events. [2023-11-10 12:38:52,326 INFO L125 PetriNetUnfolderBase]: For 285586/285591 co-relation queries the response was YES. [2023-11-10 12:38:52,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70965 conditions, 5342 events. 1786/5342 cut-off events. For 285586/285591 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51993 event pairs, 66 based on Foata normal form. 8/5343 useless extension candidates. Maximal degree in co-relation 70602. Up to 2371 conditions per place. [2023-11-10 12:38:52,418 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1084 selfloop transitions, 1459 changer transitions 28/2606 dead transitions. [2023-11-10 12:38:52,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 2606 transitions, 91483 flow [2023-11-10 12:38:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-10 12:38:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-10 12:38:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 3770 transitions. [2023-11-10 12:38:52,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760122230710466 [2023-11-10 12:38:52,421 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 3770 transitions. [2023-11-10 12:38:52,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 3770 transitions. [2023-11-10 12:38:52,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:38:52,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 3770 transitions. [2023-11-10 12:38:52,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 48.96103896103896) internal successors, (3770), 77 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:52,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:52,428 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:52,428 INFO L175 Difference]: Start difference. First operand has 820 places, 2178 transitions, 73371 flow. Second operand 77 states and 3770 transitions. [2023-11-10 12:38:52,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 2606 transitions, 91483 flow [2023-11-10 12:38:55,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 2606 transitions, 90778 flow, removed 321 selfloop flow, removed 12 redundant places. [2023-11-10 12:38:55,421 INFO L231 Difference]: Finished difference. Result has 924 places, 2482 transitions, 89160 flow [2023-11-10 12:38:55,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=72790, PETRI_DIFFERENCE_MINUEND_PLACES=804, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=89160, PETRI_PLACES=924, PETRI_TRANSITIONS=2482} [2023-11-10 12:38:55,424 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 849 predicate places. [2023-11-10 12:38:55,424 INFO L495 AbstractCegarLoop]: Abstraction has has 924 places, 2482 transitions, 89160 flow [2023-11-10 12:38:55,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:38:55,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:38:55,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:38:55,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-10 12:38:55,636 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,SelfDestructingSolverStorable20 [2023-11-10 12:38:55,636 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:38:55,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:38:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash -373101270, now seen corresponding path program 20 times [2023-11-10 12:38:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:38:55,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735183950] [2023-11-10 12:38:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:38:55,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:38:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:38:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:55,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:38:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735183950] [2023-11-10 12:38:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735183950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:38:55,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21761132] [2023-11-10 12:38:55,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:38:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:38:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:38:55,904 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) [2023-11-10 12:38:55,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-10 12:38:55,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:38:55,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:38:55,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:38:55,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:38:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:56,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:38:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:38:56,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21761132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:38:56,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:38:56,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:38:56,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888379393] [2023-11-10 12:38:56,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:38:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:38:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:38:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:38:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:38:56,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:38:56,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 924 places, 2482 transitions, 89160 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:38:56,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:38:56,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:38:56,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:39:03,823 INFO L124 PetriNetUnfolderBase]: 2085/6254 cut-off events. [2023-11-10 12:39:03,823 INFO L125 PetriNetUnfolderBase]: For 439629/439634 co-relation queries the response was YES. [2023-11-10 12:39:03,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89427 conditions, 6254 events. 2085/6254 cut-off events. For 439629/439634 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 62402 event pairs, 87 based on Foata normal form. 8/6254 useless extension candidates. Maximal degree in co-relation 89062. Up to 2563 conditions per place. [2023-11-10 12:39:03,947 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1229 selfloop transitions, 1819 changer transitions 28/3111 dead transitions. [2023-11-10 12:39:03,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 999 places, 3111 transitions, 116867 flow [2023-11-10 12:39:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-10 12:39:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-10 12:39:03,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4260 transitions. [2023-11-10 12:39:03,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760649087221096 [2023-11-10 12:39:03,950 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4260 transitions. [2023-11-10 12:39:03,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4260 transitions. [2023-11-10 12:39:03,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:39:03,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4260 transitions. [2023-11-10 12:39:03,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 48.96551724137931) internal successors, (4260), 87 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:03,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 85.0) internal successors, (7480), 88 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:03,961 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 85.0) internal successors, (7480), 88 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:03,961 INFO L175 Difference]: Start difference. First operand has 924 places, 2482 transitions, 89160 flow. Second operand 87 states and 4260 transitions. [2023-11-10 12:39:03,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 999 places, 3111 transitions, 116867 flow [2023-11-10 12:39:09,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 974 places, 3111 transitions, 115137 flow, removed 803 selfloop flow, removed 25 redundant places. [2023-11-10 12:39:09,180 INFO L231 Difference]: Finished difference. Result has 1028 places, 2965 transitions, 113322 flow [2023-11-10 12:39:09,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=88184, PETRI_DIFFERENCE_MINUEND_PLACES=888, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=113322, PETRI_PLACES=1028, PETRI_TRANSITIONS=2965} [2023-11-10 12:39:09,183 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 953 predicate places. [2023-11-10 12:39:09,183 INFO L495 AbstractCegarLoop]: Abstraction has has 1028 places, 2965 transitions, 113322 flow [2023-11-10 12:39:09,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:39:09,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:39:09,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:39:09,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-10 12:39:09,388 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,SelfDestructingSolverStorable21 [2023-11-10 12:39:09,389 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:39:09,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:39:09,389 INFO L85 PathProgramCache]: Analyzing trace with hash 729906744, now seen corresponding path program 21 times [2023-11-10 12:39:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:39:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110102985] [2023-11-10 12:39:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:39:09,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:39:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:39:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:09,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:39:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110102985] [2023-11-10 12:39:09,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110102985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:39:09,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726224883] [2023-11-10 12:39:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:39:09,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:09,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:39:09,659 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) [2023-11-10 12:39:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-10 12:39:09,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-10 12:39:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:39:09,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:39:09,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:39:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:09,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:39:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:10,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726224883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:39:10,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:39:10,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:39:10,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363114589] [2023-11-10 12:39:10,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:39:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:39:10,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:39:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:39:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:39:10,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:39:10,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1028 places, 2965 transitions, 113322 flow. Second operand has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:10,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:39:10,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:39:10,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:39:17,300 INFO L124 PetriNetUnfolderBase]: 2152/6391 cut-off events. [2023-11-10 12:39:17,300 INFO L125 PetriNetUnfolderBase]: For 536627/536632 co-relation queries the response was YES. [2023-11-10 12:39:17,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97570 conditions, 6391 events. 2152/6391 cut-off events. For 536627/536632 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 63936 event pairs, 106 based on Foata normal form. 6/6388 useless extension candidates. Maximal degree in co-relation 97148. Up to 2888 conditions per place. [2023-11-10 12:39:17,436 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1502 selfloop transitions, 1618 changer transitions 18/3173 dead transitions. [2023-11-10 12:39:17,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 3173 transitions, 126764 flow [2023-11-10 12:39:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-10 12:39:17,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-10 12:39:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 1837 transitions. [2023-11-10 12:39:17,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841017488076312 [2023-11-10 12:39:17,438 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 1837 transitions. [2023-11-10 12:39:17,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 1837 transitions. [2023-11-10 12:39:17,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:39:17,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 1837 transitions. [2023-11-10 12:39:17,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 49.648648648648646) internal successors, (1837), 37 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:17,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 85.0) internal successors, (3230), 38 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:17,446 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 85.0) internal successors, (3230), 38 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:17,446 INFO L175 Difference]: Start difference. First operand has 1028 places, 2965 transitions, 113322 flow. Second operand 37 states and 1837 transitions. [2023-11-10 12:39:17,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1053 places, 3173 transitions, 126764 flow [2023-11-10 12:39:23,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 3173 transitions, 125098 flow, removed 796 selfloop flow, removed 22 redundant places. [2023-11-10 12:39:23,542 INFO L231 Difference]: Finished difference. Result has 1044 places, 3041 transitions, 118937 flow [2023-11-10 12:39:23,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=112052, PETRI_DIFFERENCE_MINUEND_PLACES=995, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=118937, PETRI_PLACES=1044, PETRI_TRANSITIONS=3041} [2023-11-10 12:39:23,545 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 969 predicate places. [2023-11-10 12:39:23,545 INFO L495 AbstractCegarLoop]: Abstraction has has 1044 places, 3041 transitions, 118937 flow [2023-11-10 12:39:23,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:23,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:39:23,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:39:23,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-10 12:39:23,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:23,751 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:39:23,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:39:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1381493086, now seen corresponding path program 22 times [2023-11-10 12:39:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:39:23,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506588587] [2023-11-10 12:39:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:39:23,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:39:23,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:39:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:39:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506588587] [2023-11-10 12:39:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506588587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:39:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145919431] [2023-11-10 12:39:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:39:24,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:24,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:39:24,025 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) [2023-11-10 12:39:24,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-10 12:39:24,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:39:24,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:39:24,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:39:24,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:39:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:24,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:39:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:24,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145919431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:39:24,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:39:24,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:39:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248770583] [2023-11-10 12:39:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:39:24,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:39:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:39:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:39:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:39:24,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:39:24,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1044 places, 3041 transitions, 118937 flow. Second operand has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:24,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:39:24,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:39:24,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:39:32,270 INFO L124 PetriNetUnfolderBase]: 2186/6432 cut-off events. [2023-11-10 12:39:32,270 INFO L125 PetriNetUnfolderBase]: For 549703/549708 co-relation queries the response was YES. [2023-11-10 12:39:32,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100225 conditions, 6432 events. 2186/6432 cut-off events. For 549703/549708 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 64174 event pairs, 99 based on Foata normal form. 6/6431 useless extension candidates. Maximal degree in co-relation 99872. Up to 2812 conditions per place. [2023-11-10 12:39:32,415 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1468 selfloop transitions, 1689 changer transitions 18/3210 dead transitions. [2023-11-10 12:39:32,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 3210 transitions, 130706 flow [2023-11-10 12:39:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-10 12:39:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-10 12:39:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1930 transitions. [2023-11-10 12:39:32,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5822021116138764 [2023-11-10 12:39:32,417 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1930 transitions. [2023-11-10 12:39:32,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1930 transitions. [2023-11-10 12:39:32,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:39:32,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1930 transitions. [2023-11-10 12:39:32,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 49.48717948717949) internal successors, (1930), 39 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:32,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 85.0) internal successors, (3400), 40 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:32,420 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 85.0) internal successors, (3400), 40 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:32,421 INFO L175 Difference]: Start difference. First operand has 1044 places, 3041 transitions, 118937 flow. Second operand 39 states and 1930 transitions. [2023-11-10 12:39:32,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1078 places, 3210 transitions, 130706 flow [2023-11-10 12:39:38,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 3210 transitions, 130263 flow, removed 102 selfloop flow, removed 19 redundant places. [2023-11-10 12:39:38,840 INFO L231 Difference]: Finished difference. Result has 1069 places, 3091 transitions, 126193 flow [2023-11-10 12:39:38,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=118569, PETRI_DIFFERENCE_MINUEND_PLACES=1021, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=126193, PETRI_PLACES=1069, PETRI_TRANSITIONS=3091} [2023-11-10 12:39:38,843 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 994 predicate places. [2023-11-10 12:39:38,843 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 3091 transitions, 126193 flow [2023-11-10 12:39:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.15625) internal successors, (1509), 32 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:38,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:39:38,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:39:38,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-10 12:39:39,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:39,050 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:39:39,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:39:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1848462160, now seen corresponding path program 23 times [2023-11-10 12:39:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:39:39,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795028680] [2023-11-10 12:39:39,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:39:39,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:39:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:39:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:39:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795028680] [2023-11-10 12:39:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795028680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:39:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498251347] [2023-11-10 12:39:39,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-10 12:39:39,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:39,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:39:39,297 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) [2023-11-10 12:39:39,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-10 12:39:39,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-10 12:39:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:39:39,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:39:39,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:39:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:39,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:39:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:39,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498251347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:39:39,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:39:39,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:39:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067545958] [2023-11-10 12:39:39,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:39:39,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:39:39,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:39:39,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:39:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:39:39,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:39:39,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 3091 transitions, 126193 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:39:39,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:39:39,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:39:39,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:39:49,480 INFO L124 PetriNetUnfolderBase]: 2412/7043 cut-off events. [2023-11-10 12:39:49,481 INFO L125 PetriNetUnfolderBase]: For 614348/614360 co-relation queries the response was YES. [2023-11-10 12:39:49,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113198 conditions, 7043 events. 2412/7043 cut-off events. For 614348/614360 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 71290 event pairs, 87 based on Foata normal form. 9/7045 useless extension candidates. Maximal degree in co-relation 112820. Up to 2651 conditions per place. [2023-11-10 12:39:49,643 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1382 selfloop transitions, 2143 changer transitions 27/3587 dead transitions. [2023-11-10 12:39:49,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1149 places, 3587 transitions, 152880 flow [2023-11-10 12:39:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-10 12:39:49,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-11-10 12:39:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4225 transitions. [2023-11-10 12:39:49,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5713319810682894 [2023-11-10 12:39:49,646 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4225 transitions. [2023-11-10 12:39:49,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4225 transitions. [2023-11-10 12:39:49,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:39:49,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4225 transitions. [2023-11-10 12:39:49,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 48.5632183908046) internal successors, (4225), 87 states have internal predecessors, (4225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:49,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 85.0) internal successors, (7480), 88 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:49,657 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 85.0) internal successors, (7480), 88 states have internal predecessors, (7480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:39:49,657 INFO L175 Difference]: Start difference. First operand has 1069 places, 3091 transitions, 126193 flow. Second operand 87 states and 4225 transitions. [2023-11-10 12:39:49,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1149 places, 3587 transitions, 152880 flow [2023-11-10 12:39:57,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1128 places, 3587 transitions, 152461 flow, removed 99 selfloop flow, removed 21 redundant places. [2023-11-10 12:39:57,469 INFO L231 Difference]: Finished difference. Result has 1177 places, 3451 transitions, 149893 flow [2023-11-10 12:39:57,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=125861, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1799, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=149893, PETRI_PLACES=1177, PETRI_TRANSITIONS=3451} [2023-11-10 12:39:57,471 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1102 predicate places. [2023-11-10 12:39:57,472 INFO L495 AbstractCegarLoop]: Abstraction has has 1177 places, 3451 transitions, 149893 flow [2023-11-10 12:39:57,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:39:57,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:39:57,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:39:57,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-10 12:39:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-10 12:39:57,673 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:39:57,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:39:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1885277642, now seen corresponding path program 24 times [2023-11-10 12:39:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:39:57,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828869264] [2023-11-10 12:39:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:39:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:39:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:39:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:57,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:39:57,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828869264] [2023-11-10 12:39:57,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828869264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:39:57,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073888012] [2023-11-10 12:39:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-10 12:39:57,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:39:57,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:39:57,946 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) [2023-11-10 12:39:57,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-10 12:39:58,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-10 12:39:58,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:39:58,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:39:58,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:39:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:58,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:39:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:39:58,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073888012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:39:58,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:39:58,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:39:58,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414850252] [2023-11-10 12:39:58,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:39:58,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:39:58,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:39:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:39:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:39:58,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:39:58,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1177 places, 3451 transitions, 149893 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:39:58,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:39:58,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:39:58,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:40:08,761 INFO L124 PetriNetUnfolderBase]: 2442/7081 cut-off events. [2023-11-10 12:40:08,761 INFO L125 PetriNetUnfolderBase]: For 741288/741293 co-relation queries the response was YES. [2023-11-10 12:40:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121350 conditions, 7081 events. 2442/7081 cut-off events. For 741288/741293 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 71636 event pairs, 112 based on Foata normal form. 5/7079 useless extension candidates. Maximal degree in co-relation 120923. Up to 3074 conditions per place. [2023-11-10 12:40:08,941 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 1721 selfloop transitions, 1862 changer transitions 15/3633 dead transitions. [2023-11-10 12:40:08,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1213 places, 3633 transitions, 163797 flow [2023-11-10 12:40:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-10 12:40:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-10 12:40:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2336 transitions. [2023-11-10 12:40:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725490196078431 [2023-11-10 12:40:08,943 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2336 transitions. [2023-11-10 12:40:08,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2336 transitions. [2023-11-10 12:40:08,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:40:08,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2336 transitions. [2023-11-10 12:40:08,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 48.666666666666664) internal successors, (2336), 48 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:08,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 85.0) internal successors, (4165), 49 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:08,947 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 85.0) internal successors, (4165), 49 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:08,947 INFO L175 Difference]: Start difference. First operand has 1177 places, 3451 transitions, 149893 flow. Second operand 48 states and 2336 transitions. [2023-11-10 12:40:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1213 places, 3633 transitions, 163797 flow [2023-11-10 12:40:19,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1186 places, 3633 transitions, 162036 flow, removed 808 selfloop flow, removed 27 redundant places. [2023-11-10 12:40:19,286 INFO L231 Difference]: Finished difference. Result has 1196 places, 3494 transitions, 154497 flow [2023-11-10 12:40:19,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=148406, PETRI_DIFFERENCE_MINUEND_PLACES=1139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=154497, PETRI_PLACES=1196, PETRI_TRANSITIONS=3494} [2023-11-10 12:40:19,289 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1121 predicate places. [2023-11-10 12:40:19,289 INFO L495 AbstractCegarLoop]: Abstraction has has 1196 places, 3494 transitions, 154497 flow [2023-11-10 12:40:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:40:19,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:40:19,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:40:19,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-10 12:40:19,490 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,SelfDestructingSolverStorable25 [2023-11-10 12:40:19,490 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:40:19,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:40:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash 718280802, now seen corresponding path program 25 times [2023-11-10 12:40:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:40:19,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953964410] [2023-11-10 12:40:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:40:19,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:40:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:40:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:19,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:40:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953964410] [2023-11-10 12:40:19,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953964410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:40:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429719231] [2023-11-10 12:40:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-10 12:40:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:40:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:40:19,734 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) [2023-11-10 12:40:19,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-10 12:40:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:40:19,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:40:19,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:40:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:20,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:40:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:20,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429719231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:40:20,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:40:20,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:40:20,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992216011] [2023-11-10 12:40:20,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:40:20,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:40:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:40:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:40:20,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:40:20,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:40:20,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1196 places, 3494 transitions, 154497 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:40:20,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:40:20,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:40:20,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:40:31,353 INFO L124 PetriNetUnfolderBase]: 2530/7280 cut-off events. [2023-11-10 12:40:31,353 INFO L125 PetriNetUnfolderBase]: For 786114/786119 co-relation queries the response was YES. [2023-11-10 12:40:31,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127393 conditions, 7280 events. 2530/7280 cut-off events. For 786114/786119 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 73657 event pairs, 68 based on Foata normal form. 6/7280 useless extension candidates. Maximal degree in co-relation 127040. Up to 1987 conditions per place. [2023-11-10 12:40:31,605 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 1573 selfloop transitions, 2135 changer transitions 17/3760 dead transitions. [2023-11-10 12:40:31,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1266 places, 3760 transitions, 174609 flow [2023-11-10 12:40:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-10 12:40:31,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-10 12:40:31,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 3740 transitions. [2023-11-10 12:40:31,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-10 12:40:31,607 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 3740 transitions. [2023-11-10 12:40:31,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 3740 transitions. [2023-11-10 12:40:31,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:40:31,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 3740 transitions. [2023-11-10 12:40:31,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 48.57142857142857) internal successors, (3740), 77 states have internal predecessors, (3740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:31,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:31,614 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:31,614 INFO L175 Difference]: Start difference. First operand has 1196 places, 3494 transitions, 154497 flow. Second operand 77 states and 3740 transitions. [2023-11-10 12:40:31,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1266 places, 3760 transitions, 174609 flow [2023-11-10 12:40:41,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1236 places, 3760 transitions, 172760 flow, removed 81 selfloop flow, removed 30 redundant places. [2023-11-10 12:40:41,726 INFO L231 Difference]: Finished difference. Result has 1260 places, 3643 transitions, 166736 flow [2023-11-10 12:40:41,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=152786, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1990, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=166736, PETRI_PLACES=1260, PETRI_TRANSITIONS=3643} [2023-11-10 12:40:41,729 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1185 predicate places. [2023-11-10 12:40:41,729 INFO L495 AbstractCegarLoop]: Abstraction has has 1260 places, 3643 transitions, 166736 flow [2023-11-10 12:40:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:40:41,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:40:41,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:40:41,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-10 12:40:41,930 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,SelfDestructingSolverStorable26 [2023-11-10 12:40:41,930 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:40:41,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:40:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash -3052244, now seen corresponding path program 26 times [2023-11-10 12:40:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:40:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086491453] [2023-11-10 12:40:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:40:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:40:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:40:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:42,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:40:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086491453] [2023-11-10 12:40:42,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086491453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:40:42,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270026535] [2023-11-10 12:40:42,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:40:42,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:40:42,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:40:42,145 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) [2023-11-10 12:40:42,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-10 12:40:42,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:40:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:40:42,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-10 12:40:42,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:40:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:42,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:40:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:40:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270026535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:40:43,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:40:43,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2023-11-10 12:40:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785504378] [2023-11-10 12:40:43,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:40:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-10 12:40:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:40:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-10 12:40:43,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2023-11-10 12:40:43,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:40:43,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1260 places, 3643 transitions, 166736 flow. Second operand has 37 states, 37 states have (on average 47.16216216216216) internal successors, (1745), 37 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:43,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:40:43,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:40:43,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:40:54,906 INFO L124 PetriNetUnfolderBase]: 2537/7355 cut-off events. [2023-11-10 12:40:54,906 INFO L125 PetriNetUnfolderBase]: For 917596/917601 co-relation queries the response was YES. [2023-11-10 12:40:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132564 conditions, 7355 events. 2537/7355 cut-off events. For 917596/917601 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 74894 event pairs, 116 based on Foata normal form. 8/7349 useless extension candidates. Maximal degree in co-relation 132110. Up to 2567 conditions per place. [2023-11-10 12:40:55,196 INFO L140 encePairwiseOnDemand]: 63/85 looper letters, 1683 selfloop transitions, 2020 changer transitions 62/3800 dead transitions. [2023-11-10 12:40:55,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1286 places, 3800 transitions, 179976 flow [2023-11-10 12:40:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-10 12:40:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-10 12:40:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1784 transitions. [2023-11-10 12:40:55,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830065359477125 [2023-11-10 12:40:55,198 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1784 transitions. [2023-11-10 12:40:55,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1784 transitions. [2023-11-10 12:40:55,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:40:55,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1784 transitions. [2023-11-10 12:40:55,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 49.55555555555556) internal successors, (1784), 36 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:55,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 85.0) internal successors, (3145), 37 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:55,201 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 85.0) internal successors, (3145), 37 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:40:55,201 INFO L175 Difference]: Start difference. First operand has 1260 places, 3643 transitions, 166736 flow. Second operand 36 states and 1784 transitions. [2023-11-10 12:40:55,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1286 places, 3800 transitions, 179976 flow [2023-11-10 12:41:08,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1252 places, 3800 transitions, 177022 flow, removed 1103 selfloop flow, removed 34 redundant places. [2023-11-10 12:41:08,448 INFO L231 Difference]: Finished difference. Result has 1270 places, 3668 transitions, 173492 flow [2023-11-10 12:41:08,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=163850, PETRI_DIFFERENCE_MINUEND_PLACES=1217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1637, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=173492, PETRI_PLACES=1270, PETRI_TRANSITIONS=3668} [2023-11-10 12:41:08,452 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1195 predicate places. [2023-11-10 12:41:08,452 INFO L495 AbstractCegarLoop]: Abstraction has has 1270 places, 3668 transitions, 173492 flow [2023-11-10 12:41:08,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 47.16216216216216) internal successors, (1745), 37 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:08,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:41:08,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:41:08,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-10 12:41:08,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-10 12:41:08,658 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:41:08,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:41:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1626796622, now seen corresponding path program 27 times [2023-11-10 12:41:08,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:41:08,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843474964] [2023-11-10 12:41:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:41:08,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:41:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:41:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:41:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843474964] [2023-11-10 12:41:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843474964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:41:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929672436] [2023-11-10 12:41:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:41:08,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:41:08,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:41:08,894 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) [2023-11-10 12:41:08,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-10 12:41:08,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-10 12:41:08,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:41:08,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-10 12:41:08,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:41:09,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:09,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:41:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:09,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929672436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:41:09,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:41:09,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2023-11-10 12:41:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091501927] [2023-11-10 12:41:09,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:41:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-10 12:41:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:41:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-10 12:41:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2023-11-10 12:41:09,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:41:09,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1270 places, 3668 transitions, 173492 flow. Second operand has 37 states, 37 states have (on average 47.108108108108105) internal successors, (1743), 37 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:09,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:41:09,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:41:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:41:23,189 INFO L124 PetriNetUnfolderBase]: 2480/7154 cut-off events. [2023-11-10 12:41:23,189 INFO L125 PetriNetUnfolderBase]: For 919185/919190 co-relation queries the response was YES. [2023-11-10 12:41:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132596 conditions, 7154 events. 2480/7154 cut-off events. For 919185/919190 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 71874 event pairs, 79 based on Foata normal form. 6/7153 useless extension candidates. Maximal degree in co-relation 132135. Up to 2352 conditions per place. [2023-11-10 12:41:23,387 INFO L140 encePairwiseOnDemand]: 63/85 looper letters, 1325 selfloop transitions, 2433 changer transitions 16/3809 dead transitions. [2023-11-10 12:41:23,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1321 places, 3809 transitions, 185454 flow [2023-11-10 12:41:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-10 12:41:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-10 12:41:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 2923 transitions. [2023-11-10 12:41:23,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5731372549019608 [2023-11-10 12:41:23,390 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 2923 transitions. [2023-11-10 12:41:23,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 2923 transitions. [2023-11-10 12:41:23,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:41:23,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 2923 transitions. [2023-11-10 12:41:23,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 48.71666666666667) internal successors, (2923), 60 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:23,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 85.0) internal successors, (5185), 61 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:23,395 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 85.0) internal successors, (5185), 61 states have internal predecessors, (5185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:23,395 INFO L175 Difference]: Start difference. First operand has 1270 places, 3668 transitions, 173492 flow. Second operand 60 states and 2923 transitions. [2023-11-10 12:41:23,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1321 places, 3809 transitions, 185454 flow [2023-11-10 12:41:36,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1300 places, 3809 transitions, 184647 flow, removed 204 selfloop flow, removed 21 redundant places. [2023-11-10 12:41:36,364 INFO L231 Difference]: Finished difference. Result has 1324 places, 3736 transitions, 184736 flow [2023-11-10 12:41:36,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=172823, PETRI_DIFFERENCE_MINUEND_PLACES=1241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=184736, PETRI_PLACES=1324, PETRI_TRANSITIONS=3736} [2023-11-10 12:41:36,369 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1249 predicate places. [2023-11-10 12:41:36,369 INFO L495 AbstractCegarLoop]: Abstraction has has 1324 places, 3736 transitions, 184736 flow [2023-11-10 12:41:36,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 47.108108108108105) internal successors, (1743), 37 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:36,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:41:36,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:41:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-10 12:41:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-10 12:41:36,576 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:41:36,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:41:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -660616064, now seen corresponding path program 28 times [2023-11-10 12:41:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:41:36,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365022357] [2023-11-10 12:41:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:41:36,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:41:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:41:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:36,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:41:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365022357] [2023-11-10 12:41:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365022357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:41:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100144071] [2023-11-10 12:41:36,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:41:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:41:36,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:41:36,836 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) [2023-11-10 12:41:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-10 12:41:36,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:41:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:41:36,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:41:36,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:41:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:37,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:41:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:41:37,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100144071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:41:37,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:41:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:41:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346373792] [2023-11-10 12:41:37,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:41:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:41:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:41:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:41:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:41:37,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:41:37,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1324 places, 3736 transitions, 184736 flow. Second operand has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:37,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:41:37,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:41:37,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:41:53,102 INFO L124 PetriNetUnfolderBase]: 2644/7628 cut-off events. [2023-11-10 12:41:53,102 INFO L125 PetriNetUnfolderBase]: For 1035619/1035624 co-relation queries the response was YES. [2023-11-10 12:41:53,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147324 conditions, 7628 events. 2644/7628 cut-off events. For 1035619/1035624 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 77708 event pairs, 88 based on Foata normal form. 39/7661 useless extension candidates. Maximal degree in co-relation 146878. Up to 3579 conditions per place. [2023-11-10 12:41:53,324 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 1879 selfloop transitions, 2275 changer transitions 23/4212 dead transitions. [2023-11-10 12:41:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1391 places, 4212 transitions, 214747 flow [2023-11-10 12:41:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-10 12:41:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-10 12:41:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 3729 transitions. [2023-11-10 12:41:53,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697478991596638 [2023-11-10 12:41:53,327 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 3729 transitions. [2023-11-10 12:41:53,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 3729 transitions. [2023-11-10 12:41:53,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:41:53,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 3729 transitions. [2023-11-10 12:41:53,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 48.42857142857143) internal successors, (3729), 77 states have internal predecessors, (3729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:53,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:53,333 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 85.0) internal successors, (6630), 78 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:41:53,333 INFO L175 Difference]: Start difference. First operand has 1324 places, 3736 transitions, 184736 flow. Second operand 77 states and 3729 transitions. [2023-11-10 12:41:53,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1391 places, 4212 transitions, 214747 flow [2023-11-10 12:42:08,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1363 places, 4212 transitions, 210720 flow, removed 1666 selfloop flow, removed 28 redundant places. [2023-11-10 12:42:09,057 INFO L231 Difference]: Finished difference. Result has 1412 places, 4068 transitions, 207985 flow [2023-11-10 12:42:09,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=180461, PETRI_DIFFERENCE_MINUEND_PLACES=1287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=207985, PETRI_PLACES=1412, PETRI_TRANSITIONS=4068} [2023-11-10 12:42:09,062 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1337 predicate places. [2023-11-10 12:42:09,062 INFO L495 AbstractCegarLoop]: Abstraction has has 1412 places, 4068 transitions, 207985 flow [2023-11-10 12:42:09,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:09,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:42:09,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:42:09,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-10 12:42:09,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:42:09,268 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:42:09,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:42:09,269 INFO L85 PathProgramCache]: Analyzing trace with hash -658034056, now seen corresponding path program 29 times [2023-11-10 12:42:09,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:42:09,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656673921] [2023-11-10 12:42:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:42:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:42:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:42:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:42:09,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656673921] [2023-11-10 12:42:09,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656673921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:42:09,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334156129] [2023-11-10 12:42:09,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-10 12:42:09,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:42:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:42:09,538 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) [2023-11-10 12:42:09,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-10 12:42:09,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:42:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:42:09,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:42:09,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:42:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:09,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:42:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334156129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:42:10,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:42:10,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:42:10,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331248986] [2023-11-10 12:42:10,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:42:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:42:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:42:10,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:42:10,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:42:10,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:42:10,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1412 places, 4068 transitions, 207985 flow. Second operand has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:10,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:42:10,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:42:10,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:42:25,130 INFO L124 PetriNetUnfolderBase]: 2644/7571 cut-off events. [2023-11-10 12:42:25,130 INFO L125 PetriNetUnfolderBase]: For 841535/841540 co-relation queries the response was YES. [2023-11-10 12:42:25,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146886 conditions, 7571 events. 2644/7571 cut-off events. For 841535/841540 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 76687 event pairs, 90 based on Foata normal form. 5/7570 useless extension candidates. Maximal degree in co-relation 146379. Up to 3916 conditions per place. [2023-11-10 12:42:25,355 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 1954 selfloop transitions, 2147 changer transitions 10/4146 dead transitions. [2023-11-10 12:42:25,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1430 places, 4146 transitions, 218341 flow [2023-11-10 12:42:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-10 12:42:25,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-10 12:42:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1435 transitions. [2023-11-10 12:42:25,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821501014198783 [2023-11-10 12:42:25,357 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1435 transitions. [2023-11-10 12:42:25,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1435 transitions. [2023-11-10 12:42:25,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:42:25,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1435 transitions. [2023-11-10 12:42:25,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 49.48275862068966) internal successors, (1435), 29 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:25,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:25,361 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:25,361 INFO L175 Difference]: Start difference. First operand has 1412 places, 4068 transitions, 207985 flow. Second operand 29 states and 1435 transitions. [2023-11-10 12:42:25,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1430 places, 4146 transitions, 218341 flow [2023-11-10 12:42:39,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1412 places, 4146 transitions, 217765 flow, removed 238 selfloop flow, removed 18 redundant places. [2023-11-10 12:42:39,856 INFO L231 Difference]: Finished difference. Result has 1420 places, 4076 transitions, 213478 flow [2023-11-10 12:42:39,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=207425, PETRI_DIFFERENCE_MINUEND_PLACES=1384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=213478, PETRI_PLACES=1420, PETRI_TRANSITIONS=4076} [2023-11-10 12:42:39,859 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1345 predicate places. [2023-11-10 12:42:39,859 INFO L495 AbstractCegarLoop]: Abstraction has has 1420 places, 4076 transitions, 213478 flow [2023-11-10 12:42:39,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:39,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:42:39,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:42:39,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-10 12:42:40,060 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,SelfDestructingSolverStorable30 [2023-11-10 12:42:40,060 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:42:40,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:42:40,061 INFO L85 PathProgramCache]: Analyzing trace with hash 648095228, now seen corresponding path program 30 times [2023-11-10 12:42:40,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:42:40,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478572618] [2023-11-10 12:42:40,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:42:40,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:42:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:42:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:40,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:42:40,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478572618] [2023-11-10 12:42:40,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478572618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:42:40,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516937257] [2023-11-10 12:42:40,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-10 12:42:40,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:42:40,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:42:40,322 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) [2023-11-10 12:42:40,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-10 12:42:40,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-10 12:42:40,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:42:40,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:42:40,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:42:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:40,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:42:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:42:40,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516937257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:42:40,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:42:40,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:42:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336049273] [2023-11-10 12:42:40,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:42:40,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:42:40,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:42:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:42:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:42:40,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:42:40,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1420 places, 4076 transitions, 213478 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:42:40,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:42:40,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:42:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:42:57,368 INFO L124 PetriNetUnfolderBase]: 2888/8241 cut-off events. [2023-11-10 12:42:57,368 INFO L125 PetriNetUnfolderBase]: For 975800/975805 co-relation queries the response was YES. [2023-11-10 12:42:57,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163544 conditions, 8241 events. 2888/8241 cut-off events. For 975800/975805 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 85033 event pairs, 76 based on Foata normal form. 7/8242 useless extension candidates. Maximal degree in co-relation 163051. Up to 3111 conditions per place. [2023-11-10 12:42:57,608 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 1823 selfloop transitions, 2729 changer transitions 16/4603 dead transitions. [2023-11-10 12:42:57,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1491 places, 4603 transitions, 247373 flow [2023-11-10 12:42:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-10 12:42:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-11-10 12:42:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 3678 transitions. [2023-11-10 12:42:57,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693498452012384 [2023-11-10 12:42:57,611 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 3678 transitions. [2023-11-10 12:42:57,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 3678 transitions. [2023-11-10 12:42:57,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:42:57,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 3678 transitions. [2023-11-10 12:42:57,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 48.39473684210526) internal successors, (3678), 76 states have internal predecessors, (3678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:57,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 85.0) internal successors, (6545), 77 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:57,617 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 85.0) internal successors, (6545), 77 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:42:57,617 INFO L175 Difference]: Start difference. First operand has 1420 places, 4076 transitions, 213478 flow. Second operand 76 states and 3678 transitions. [2023-11-10 12:42:57,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1491 places, 4603 transitions, 247373 flow [2023-11-10 12:43:13,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1470 places, 4603 transitions, 247041 flow, removed 28 selfloop flow, removed 21 redundant places. [2023-11-10 12:43:13,727 INFO L231 Difference]: Finished difference. Result has 1499 places, 4462 transitions, 241972 flow [2023-11-10 12:43:13,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=213176, PETRI_DIFFERENCE_MINUEND_PLACES=1395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=241972, PETRI_PLACES=1499, PETRI_TRANSITIONS=4462} [2023-11-10 12:43:13,730 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1424 predicate places. [2023-11-10 12:43:13,730 INFO L495 AbstractCegarLoop]: Abstraction has has 1499 places, 4462 transitions, 241972 flow [2023-11-10 12:43:13,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:43:13,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:43:13,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:43:13,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-10 12:43:13,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:43:13,932 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:43:13,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:43:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1194413630, now seen corresponding path program 31 times [2023-11-10 12:43:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:43:13,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652340340] [2023-11-10 12:43:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:43:13,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:43:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:43:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:14,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:43:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652340340] [2023-11-10 12:43:14,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652340340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:43:14,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363854135] [2023-11-10 12:43:14,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-10 12:43:14,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:43:14,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:43:14,194 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) [2023-11-10 12:43:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-10 12:43:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:43:14,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:43:14,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:43:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:14,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:43:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:14,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363854135] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:43:14,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:43:14,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:43:14,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933369620] [2023-11-10 12:43:14,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:43:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:43:14,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:43:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:43:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:43:14,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:43:14,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1499 places, 4462 transitions, 241972 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:43:14,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:43:14,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:43:14,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:43:35,539 INFO L124 PetriNetUnfolderBase]: 3151/9005 cut-off events. [2023-11-10 12:43:35,540 INFO L125 PetriNetUnfolderBase]: For 1139911/1139916 co-relation queries the response was YES. [2023-11-10 12:43:35,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186034 conditions, 9005 events. 3151/9005 cut-off events. For 1139911/1139916 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 94822 event pairs, 108 based on Foata normal form. 8/9007 useless extension candidates. Maximal degree in co-relation 185528. Up to 4106 conditions per place. [2023-11-10 12:43:35,882 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 2173 selfloop transitions, 2845 changer transitions 23/5076 dead transitions. [2023-11-10 12:43:35,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1586 places, 5076 transitions, 283359 flow [2023-11-10 12:43:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-10 12:43:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-11-10 12:43:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 4578 transitions. [2023-11-10 12:43:35,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669349845201238 [2023-11-10 12:43:35,884 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 4578 transitions. [2023-11-10 12:43:35,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 4578 transitions. [2023-11-10 12:43:35,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:43:35,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 4578 transitions. [2023-11-10 12:43:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 48.189473684210526) internal successors, (4578), 95 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:43:35,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 85.0) internal successors, (8160), 96 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:43:35,891 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 85.0) internal successors, (8160), 96 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:43:35,892 INFO L175 Difference]: Start difference. First operand has 1499 places, 4462 transitions, 241972 flow. Second operand 95 states and 4578 transitions. [2023-11-10 12:43:35,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1586 places, 5076 transitions, 283359 flow [2023-11-10 12:43:58,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1558 places, 5076 transitions, 280693 flow, removed 1102 selfloop flow, removed 28 redundant places. [2023-11-10 12:43:58,617 INFO L231 Difference]: Finished difference. Result has 1595 places, 4908 transitions, 276665 flow [2023-11-10 12:43:58,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=240183, PETRI_DIFFERENCE_MINUEND_PLACES=1464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=276665, PETRI_PLACES=1595, PETRI_TRANSITIONS=4908} [2023-11-10 12:43:58,621 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1520 predicate places. [2023-11-10 12:43:58,621 INFO L495 AbstractCegarLoop]: Abstraction has has 1595 places, 4908 transitions, 276665 flow [2023-11-10 12:43:58,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:43:58,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:43:58,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:43:58,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-10 12:43:58,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:43:58,822 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:43:58,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:43:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1966307788, now seen corresponding path program 32 times [2023-11-10 12:43:58,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:43:58,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730086176] [2023-11-10 12:43:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:43:58,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:43:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:43:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:59,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:43:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730086176] [2023-11-10 12:43:59,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730086176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:43:59,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14499032] [2023-11-10 12:43:59,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:43:59,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:43:59,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:43:59,105 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) [2023-11-10 12:43:59,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-10 12:43:59,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:43:59,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:43:59,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:43:59,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:43:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:59,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:43:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:43:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14499032] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:43:59,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:43:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2023-11-10 12:43:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185061946] [2023-11-10 12:43:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:43:59,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-10 12:43:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:43:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-10 12:43:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2023-11-10 12:43:59,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:43:59,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1595 places, 4908 transitions, 276665 flow. Second operand has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:43:59,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:43:59,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:43:59,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:44:26,333 INFO L124 PetriNetUnfolderBase]: 3187/9043 cut-off events. [2023-11-10 12:44:26,333 INFO L125 PetriNetUnfolderBase]: For 1200269/1200274 co-relation queries the response was YES. [2023-11-10 12:44:26,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192797 conditions, 9043 events. 3187/9043 cut-off events. For 1200269/1200274 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 94954 event pairs, 110 based on Foata normal form. 5/9042 useless extension candidates. Maximal degree in co-relation 192287. Up to 4558 conditions per place. [2023-11-10 12:44:26,700 INFO L140 encePairwiseOnDemand]: 69/85 looper letters, 2353 selfloop transitions, 2641 changer transitions 10/5039 dead transitions. [2023-11-10 12:44:26,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1622 places, 5039 transitions, 291307 flow [2023-11-10 12:44:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-10 12:44:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-10 12:44:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1862 transitions. [2023-11-10 12:44:26,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2023-11-10 12:44:26,702 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1862 transitions. [2023-11-10 12:44:26,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1862 transitions. [2023-11-10 12:44:26,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:44:26,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1862 transitions. [2023-11-10 12:44:26,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 49.0) internal successors, (1862), 38 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:44:26,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 85.0) internal successors, (3315), 39 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:44:26,705 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 85.0) internal successors, (3315), 39 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:44:26,705 INFO L175 Difference]: Start difference. First operand has 1595 places, 4908 transitions, 276665 flow. Second operand 38 states and 1862 transitions. [2023-11-10 12:44:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1622 places, 5039 transitions, 291307 flow [2023-11-10 12:44:51,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1598 places, 5039 transitions, 289938 flow, removed 597 selfloop flow, removed 24 redundant places. [2023-11-10 12:44:52,006 INFO L231 Difference]: Finished difference. Result has 1609 places, 4963 transitions, 287670 flow [2023-11-10 12:44:52,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=275333, PETRI_DIFFERENCE_MINUEND_PLACES=1561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=287670, PETRI_PLACES=1609, PETRI_TRANSITIONS=4963} [2023-11-10 12:44:52,010 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1534 predicate places. [2023-11-10 12:44:52,010 INFO L495 AbstractCegarLoop]: Abstraction has has 1609 places, 4963 transitions, 287670 flow [2023-11-10 12:44:52,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 47.09375) internal successors, (1507), 32 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) [2023-11-10 12:44:52,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:44:52,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:44:52,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-10 12:44:52,211 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,SelfDestructingSolverStorable33 [2023-11-10 12:44:52,211 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:44:52,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:44:52,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1689347034, now seen corresponding path program 33 times [2023-11-10 12:44:52,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:44:52,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612768619] [2023-11-10 12:44:52,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:44:52,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:44:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:44:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:44:52,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:44:52,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612768619] [2023-11-10 12:44:52,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612768619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:44:52,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735101167] [2023-11-10 12:44:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:44:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:44:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:44:52,513 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) [2023-11-10 12:44:52,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-10 12:44:52,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-10 12:44:52,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:44:52,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:44:52,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:44:52,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:44:52,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:44:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:44:53,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735101167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:44:53,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:44:53,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:44:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061748019] [2023-11-10 12:44:53,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:44:53,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:44:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:44:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:44:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:44:53,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:44:53,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1609 places, 4963 transitions, 287670 flow. Second operand has 31 states, 31 states have (on average 47.193548387096776) internal successors, (1463), 31 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:44:53,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:44:53,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:44:53,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:45:20,334 INFO L124 PetriNetUnfolderBase]: 3471/9984 cut-off events. [2023-11-10 12:45:20,334 INFO L125 PetriNetUnfolderBase]: For 1417883/1417888 co-relation queries the response was YES. [2023-11-10 12:45:20,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214939 conditions, 9984 events. 3471/9984 cut-off events. For 1417883/1417888 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 107549 event pairs, 110 based on Foata normal form. 15/9993 useless extension candidates. Maximal degree in co-relation 214394. Up to 4741 conditions per place. [2023-11-10 12:45:20,669 INFO L140 encePairwiseOnDemand]: 68/85 looper letters, 2674 selfloop transitions, 2706 changer transitions 89/5504 dead transitions. [2023-11-10 12:45:20,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1658 places, 5504 transitions, 326736 flow [2023-11-10 12:45:20,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-10 12:45:20,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-10 12:45:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2705 transitions. [2023-11-10 12:45:20,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786096256684492 [2023-11-10 12:45:20,672 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2705 transitions. [2023-11-10 12:45:20,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2705 transitions. [2023-11-10 12:45:20,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:45:20,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2705 transitions. [2023-11-10 12:45:20,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 49.18181818181818) internal successors, (2705), 55 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:45:20,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 85.0) internal successors, (4760), 56 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:45:20,676 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 85.0) internal successors, (4760), 56 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:45:20,676 INFO L175 Difference]: Start difference. First operand has 1609 places, 4963 transitions, 287670 flow. Second operand 55 states and 2705 transitions. [2023-11-10 12:45:20,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1658 places, 5504 transitions, 326736 flow [2023-11-10 12:45:49,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1638 places, 5504 transitions, 325769 flow, removed 48 selfloop flow, removed 20 redundant places. [2023-11-10 12:45:49,731 INFO L231 Difference]: Finished difference. Result has 1678 places, 5277 transitions, 317998 flow [2023-11-10 12:45:49,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=286781, PETRI_DIFFERENCE_MINUEND_PLACES=1584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=317998, PETRI_PLACES=1678, PETRI_TRANSITIONS=5277} [2023-11-10 12:45:49,734 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 1603 predicate places. [2023-11-10 12:45:49,734 INFO L495 AbstractCegarLoop]: Abstraction has has 1678 places, 5277 transitions, 317998 flow [2023-11-10 12:45:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 47.193548387096776) internal successors, (1463), 31 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:45:49,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:45:49,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:45:49,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-10 12:45:49,935 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,SelfDestructingSolverStorable34 [2023-11-10 12:45:49,935 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 12:45:49,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:45:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1312410306, now seen corresponding path program 34 times [2023-11-10 12:45:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:45:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501024332] [2023-11-10 12:45:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:45:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:45:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:45:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:45:50,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:45:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501024332] [2023-11-10 12:45:50,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501024332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:45:50,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729693792] [2023-11-10 12:45:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-10 12:45:50,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:45:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:45:50,149 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) [2023-11-10 12:45:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-10 12:45:50,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-10 12:45:50,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:45:50,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-10 12:45:50,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:45:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:45:50,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:45:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:45:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729693792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:45:50,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:45:50,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2023-11-10 12:45:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219320820] [2023-11-10 12:45:50,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:45:50,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-10 12:45:50,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:45:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-10 12:45:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-11-10 12:45:50,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 85 [2023-11-10 12:45:50,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1678 places, 5277 transitions, 317998 flow. Second operand has 31 states, 31 states have (on average 47.12903225806452) internal successors, (1461), 31 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:45:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:45:50,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 85 [2023-11-10 12:45:50,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-10 12:45:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-10 12:45:51,465 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-10 12:45:51,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-10 12:45:51,484 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-10 12:45:51,484 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-10 12:45:51,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-10 12:45:51,666 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 45/85 universal loopers) in iteration 36,while PetriNetUnfolder was constructing finite prefix that currently has 1485 conditions, 108 events (15/107 cut-off events. For 8155/8168 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 496 event pairs, 1 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 1007. Up to 21 conditions per place.). [2023-11-10 12:45:51,667 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-10 12:45:51,667 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-10 12:45:51,668 INFO L445 BasicCegarLoop]: Path program histogram: [34, 1, 1] [2023-11-10 12:45:51,670 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-10 12:45:51,670 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-10 12:45:51,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.11 12:45:51 BasicIcfg [2023-11-10 12:45:51,673 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-10 12:45:51,673 INFO L158 Benchmark]: Toolchain (without parser) took 515222.68ms. Allocated memory was 264.2MB in the beginning and 4.1GB in the end (delta: 3.8GB). Free memory was 218.7MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-11-10 12:45:51,673 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-10 12:45:51,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.20ms. Allocated memory is still 264.2MB. Free memory was 218.7MB in the beginning and 207.7MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-10 12:45:51,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.25ms. Allocated memory is still 264.2MB. Free memory was 207.1MB in the beginning and 206.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-10 12:45:51,674 INFO L158 Benchmark]: Boogie Preprocessor took 23.29ms. Allocated memory is still 264.2MB. Free memory was 205.6MB in the beginning and 204.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-10 12:45:51,674 INFO L158 Benchmark]: RCFGBuilder took 310.79ms. Allocated memory is still 264.2MB. Free memory was 204.5MB in the beginning and 189.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-11-10 12:45:51,674 INFO L158 Benchmark]: TraceAbstraction took 514628.33ms. Allocated memory was 264.2MB in the beginning and 4.1GB in the end (delta: 3.8GB). Free memory was 188.8MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-11-10 12:45:51,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 135.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.20ms. Allocated memory is still 264.2MB. Free memory was 218.7MB in the beginning and 207.7MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.25ms. Allocated memory is still 264.2MB. Free memory was 207.1MB in the beginning and 206.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.29ms. Allocated memory is still 264.2MB. Free memory was 205.6MB in the beginning and 204.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 310.79ms. Allocated memory is still 264.2MB. Free memory was 204.5MB in the beginning and 189.3MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 514628.33ms. Allocated memory was 264.2MB in the beginning and 4.1GB in the end (delta: 3.8GB). Free memory was 188.8MB in the beginning and 2.1GB in the end (delta: -1.9GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 45/85 universal loopers) in iteration 36,while PetriNetUnfolder was constructing finite prefix that currently has 1485 conditions, 108 events (15/107 cut-off events. For 8155/8168 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 496 event pairs, 1 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 1007. Up to 21 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 45/85 universal loopers) in iteration 36,while PetriNetUnfolder was constructing finite prefix that currently has 1485 conditions, 108 events (15/107 cut-off events. For 8155/8168 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 496 event pairs, 1 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 1007. Up to 21 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (31states, 45/85 universal loopers) in iteration 36,while PetriNetUnfolder was constructing finite prefix that currently has 1485 conditions, 108 events (15/107 cut-off events. For 8155/8168 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 496 event pairs, 1 based on Foata normal form. 6/149 useless extension candidates. Maximal degree in co-relation 1007. Up to 21 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 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: 514.5s, OverallIterations: 36, TraceHistogramMax: 1, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 471.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7071 SdHoareTripleChecker+Valid, 19.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7071 mSDsluCounter, 15963 SdHoareTripleChecker+Invalid, 16.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14448 mSDsCounter, 2202 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44069 IncrementalHoareTripleChecker+Invalid, 46271 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2202 mSolverCounterUnsat, 1515 mSDtfsCounter, 44069 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6718 GetRequests, 4147 SyntacticMatches, 2 SemanticMatches, 2569 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64358 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=317998occurred in iteration=35, InterpolantAutomatonStates: 1996, 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, 32.3s InterpolantComputationTime, 4811 NumberOfCodeBlocks, 4775 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 7080 ConstructedInterpolants, 0 QuantifiedInterpolants, 46061 SizeOfPredicates, 419 NumberOfNonLiveVariables, 5157 ConjunctsInSsa, 687 ConjunctsInUnsatCore, 106 InterpolantComputations, 1 PerfectInterpolantSequences, 0/207 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown