/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:26:04,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:26:04,680 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 01:26:04,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:26:04,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:26:04,712 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:26:04,713 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:26:04,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:26:04,715 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:26:04,715 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:26:04,716 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:26:04,716 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:26:04,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:26:04,717 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:26:04,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:26:04,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:26:04,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:26:04,718 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:26:04,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:26:04,718 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:26:04,719 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:26:04,719 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:26:04,720 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:26:04,720 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:26:04,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:26:04,720 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:26:04,721 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:26:04,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:04,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:26:04,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:26:04,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:26:04,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:26:04,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:26:04,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:26:04,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:26:04,724 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:26:05,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:26:05,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:26:05,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:26:05,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:26:05,072 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:26:05,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-27 01:26:06,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:26:06,471 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:26:06,472 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-27 01:26:06,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4cd16dcd/0451e51c06d64a1fbb55407df54b893d/FLAG6ba5715fb [2023-08-27 01:26:06,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4cd16dcd/0451e51c06d64a1fbb55407df54b893d [2023-08-27 01:26:06,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:26:06,502 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:26:06,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:06,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:26:06,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:26:06,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e2a2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06, skipping insertion in model container [2023-08-27 01:26:06,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,532 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:26:06,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:06,705 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:26:06,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:06,741 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:06,742 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:06,747 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:26:06,749 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06 WrapperNode [2023-08-27 01:26:06,749 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:06,751 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:06,751 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:26:06,751 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:26:06,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,765 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,785 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 59 [2023-08-27 01:26:06,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:06,786 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:26:06,786 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:26:06,786 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:26:06,794 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,804 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,813 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,820 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,822 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:26:06,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:26:06,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:26:06,823 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:26:06,823 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (1/1) ... [2023-08-27 01:26:06,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:06,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:06,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 01:26:06,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 01:26:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:26:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:26:06,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:26:06,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:26:06,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:26:06,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:26:06,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:26:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:26:06,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:26:06,897 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 01:26:06,978 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:26:06,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:26:07,204 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:26:07,244 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:26:07,245 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 01:26:07,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:07 BoogieIcfgContainer [2023-08-27 01:26:07,247 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:26:07,249 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:26:07,249 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:26:07,251 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:26:07,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:26:06" (1/3) ... [2023-08-27 01:26:07,252 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b857bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:07, skipping insertion in model container [2023-08-27 01:26:07,252 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:06" (2/3) ... [2023-08-27 01:26:07,253 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b857bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:07, skipping insertion in model container [2023-08-27 01:26:07,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:07" (3/3) ... [2023-08-27 01:26:07,254 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-27 01:26:07,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:26:07,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-27 01:26:07,270 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:26:07,344 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 01:26:07,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-08-27 01:26:07,445 INFO L124 PetriNetUnfolderBase]: 6/79 cut-off events. [2023-08-27 01:26:07,446 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:26:07,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-27 01:26:07,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-08-27 01:26:07,456 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2023-08-27 01:26:07,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:26:07,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 70 transitions, 152 flow [2023-08-27 01:26:07,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 70 transitions, 152 flow [2023-08-27 01:26:07,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 152 flow [2023-08-27 01:26:07,507 INFO L124 PetriNetUnfolderBase]: 6/70 cut-off events. [2023-08-27 01:26:07,507 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:26:07,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-27 01:26:07,509 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-08-27 01:26:09,471 INFO L134 LiptonReduction]: Checked pairs total: 468 [2023-08-27 01:26:09,472 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-27 01:26:09,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:26:09,488 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ff81bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:26:09,488 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-27 01:26:09,492 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:26:09,492 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-27 01:26:09,492 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:26:09,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:09,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:09,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:09,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:09,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1751437166, now seen corresponding path program 1 times [2023-08-27 01:26:09,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:09,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797349411] [2023-08-27 01:26:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:09,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:09,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:09,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:09,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797349411] [2023-08-27 01:26:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797349411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:09,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:09,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 01:26:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586141698] [2023-08-27 01:26:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:09,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:09,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:09,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 145 [2023-08-27 01:26:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:09,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 145 [2023-08-27 01:26:09,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:09,958 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-08-27 01:26:09,958 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-27 01:26:09,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 244 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-27 01:26:09,960 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-27 01:26:09,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-27 01:26:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-27 01:26:09,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2023-08-27 01:26:09,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-27 01:26:09,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-27 01:26:09,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:09,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-27 01:26:09,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:09,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:09,983 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:09,985 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 273 transitions. [2023-08-27 01:26:09,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-27 01:26:09,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 01:26:09,988 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-27 01:26:09,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-27 01:26:09,993 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-27 01:26:09,993 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-27 01:26:09,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:09,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:09,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:09,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:26:09,994 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:09,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1932106491, now seen corresponding path program 1 times [2023-08-27 01:26:09,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:09,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115102043] [2023-08-27 01:26:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:09,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:10,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:10,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115102043] [2023-08-27 01:26:10,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115102043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:10,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:10,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 01:26:10,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356178993] [2023-08-27 01:26:10,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:10,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:10,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:10,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:10,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:10,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 145 [2023-08-27 01:26:10,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:10,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 145 [2023-08-27 01:26:10,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:10,178 INFO L124 PetriNetUnfolderBase]: 60/119 cut-off events. [2023-08-27 01:26:10,178 INFO L125 PetriNetUnfolderBase]: For 25/35 co-relation queries the response was YES. [2023-08-27 01:26:10,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 25/35 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 356 event pairs, 24 based on Foata normal form. 14/106 useless extension candidates. Maximal degree in co-relation 89. Up to 74 conditions per place. [2023-08-27 01:26:10,180 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-08-27 01:26:10,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-08-27 01:26:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:10,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2023-08-27 01:26:10,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-08-27 01:26:10,185 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2023-08-27 01:26:10,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2023-08-27 01:26:10,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:10,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2023-08-27 01:26:10,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,193 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,193 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 270 transitions. [2023-08-27 01:26:10,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-08-27 01:26:10,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:10,194 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-08-27 01:26:10,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-08-27 01:26:10,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-27 01:26:10,195 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-08-27 01:26:10,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:10,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:10,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 01:26:10,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:10,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash -710525393, now seen corresponding path program 2 times [2023-08-27 01:26:10,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046817093] [2023-08-27 01:26:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:10,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:10,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046817093] [2023-08-27 01:26:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046817093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:10,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136986558] [2023-08-27 01:26:10,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:10,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:10,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:10,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:10,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 01:26:10,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:26:10,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:10,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:26:10,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:10,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:10,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136986558] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:10,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:10,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-27 01:26:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596697210] [2023-08-27 01:26:10,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:26:10,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 145 [2023-08-27 01:26:10,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:10,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 145 [2023-08-27 01:26:10,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:10,606 INFO L124 PetriNetUnfolderBase]: 51/94 cut-off events. [2023-08-27 01:26:10,607 INFO L125 PetriNetUnfolderBase]: For 72/84 co-relation queries the response was YES. [2023-08-27 01:26:10,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 24 based on Foata normal form. 20/105 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-08-27 01:26:10,608 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-27 01:26:10,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-08-27 01:26:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 261 transitions. [2023-08-27 01:26:10,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-27 01:26:10,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 261 transitions. [2023-08-27 01:26:10,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 261 transitions. [2023-08-27 01:26:10,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:10,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 261 transitions. [2023-08-27 01:26:10,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,613 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,613 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 261 transitions. [2023-08-27 01:26:10,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-08-27 01:26:10,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:10,614 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-08-27 01:26:10,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-27 01:26:10,615 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-27 01:26:10,615 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-08-27 01:26:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.25) internal successors, (253), 4 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:10,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:10,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:10,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 01:26:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:10,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:10,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -728000581, now seen corresponding path program 1 times [2023-08-27 01:26:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:10,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652631833] [2023-08-27 01:26:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:11,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652631833] [2023-08-27 01:26:11,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652631833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:11,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889337086] [2023-08-27 01:26:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:11,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:11,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:11,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 01:26:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:26:11,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:11,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889337086] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:11,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:26:11,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-08-27 01:26:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941885424] [2023-08-27 01:26:11,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:11,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:26:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:26:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:26:11,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 145 [2023-08-27 01:26:11,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:11,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 145 [2023-08-27 01:26:11,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:11,549 INFO L124 PetriNetUnfolderBase]: 95/175 cut-off events. [2023-08-27 01:26:11,549 INFO L125 PetriNetUnfolderBase]: For 49/62 co-relation queries the response was YES. [2023-08-27 01:26:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 49/62 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 549 event pairs, 15 based on Foata normal form. 14/147 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-08-27 01:26:11,554 INFO L140 encePairwiseOnDemand]: 141/145 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-08-27 01:26:11,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-08-27 01:26:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 276 transitions. [2023-08-27 01:26:11,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586206896551725 [2023-08-27 01:26:11,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 276 transitions. [2023-08-27 01:26:11,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 276 transitions. [2023-08-27 01:26:11,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:11,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 276 transitions. [2023-08-27 01:26:11,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,558 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,558 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 276 transitions. [2023-08-27 01:26:11,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-08-27 01:26:11,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:26:11,560 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-08-27 01:26:11,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-27 01:26:11,561 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-27 01:26:11,561 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-08-27 01:26:11,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:11,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:11,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:11,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:11,767 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,SelfDestructingSolverStorable3 [2023-08-27 01:26:11,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:11,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:11,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1716050091, now seen corresponding path program 2 times [2023-08-27 01:26:11,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:11,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332457358] [2023-08-27 01:26:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:11,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332457358] [2023-08-27 01:26:11,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332457358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:11,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230819402] [2023-08-27 01:26:11,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:11,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:11,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:11,866 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 01:26:11,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:11,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 01:26:11,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:11,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:12,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230819402] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:12,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:12,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-27 01:26:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139214904] [2023-08-27 01:26:12,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:26:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:26:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:26:12,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 145 [2023-08-27 01:26:12,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:12,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 145 [2023-08-27 01:26:12,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:12,201 INFO L124 PetriNetUnfolderBase]: 132/239 cut-off events. [2023-08-27 01:26:12,202 INFO L125 PetriNetUnfolderBase]: For 251/265 co-relation queries the response was YES. [2023-08-27 01:26:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 251/265 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 760 event pairs, 32 based on Foata normal form. 28/267 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2023-08-27 01:26:12,204 INFO L140 encePairwiseOnDemand]: 140/145 looper letters, 30 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2023-08-27 01:26:12,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 259 flow [2023-08-27 01:26:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:26:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:26:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2023-08-27 01:26:12,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4517241379310345 [2023-08-27 01:26:12,206 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2023-08-27 01:26:12,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2023-08-27 01:26:12,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:12,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2023-08-27 01:26:12,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,210 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,210 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 6 states and 393 transitions. [2023-08-27 01:26:12,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 259 flow [2023-08-27 01:26:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 01:26:12,214 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 183 flow [2023-08-27 01:26:12,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-27 01:26:12,216 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2023-08-27 01:26:12,216 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 183 flow [2023-08-27 01:26:12,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:12,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:12,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:12,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:12,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:12,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:12,423 INFO L85 PathProgramCache]: Analyzing trace with hash 814792943, now seen corresponding path program 3 times [2023-08-27 01:26:12,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:12,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123283700] [2023-08-27 01:26:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123283700] [2023-08-27 01:26:12,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123283700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:12,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905708224] [2023-08-27 01:26:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:26:12,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:12,634 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:12,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 01:26:12,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:26:12,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:12,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:26:12,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905708224] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:12,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:12,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 01:26:12,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605961379] [2023-08-27 01:26:12,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:12,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:26:12,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:26:12,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:12,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:12,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 58.142857142857146) internal successors, (814), 14 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:12,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:12,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:12,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:13,326 INFO L124 PetriNetUnfolderBase]: 247/418 cut-off events. [2023-08-27 01:26:13,327 INFO L125 PetriNetUnfolderBase]: For 799/799 co-relation queries the response was YES. [2023-08-27 01:26:13,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 418 events. 247/418 cut-off events. For 799/799 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1556 event pairs, 2 based on Foata normal form. 14/432 useless extension candidates. Maximal degree in co-relation 1050. Up to 145 conditions per place. [2023-08-27 01:26:13,329 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 71 selfloop transitions, 31 changer transitions 14/116 dead transitions. [2023-08-27 01:26:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 116 transitions, 858 flow [2023-08-27 01:26:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 01:26:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 01:26:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 990 transitions. [2023-08-27 01:26:13,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4267241379310345 [2023-08-27 01:26:13,333 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 990 transitions. [2023-08-27 01:26:13,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 990 transitions. [2023-08-27 01:26:13,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:13,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 990 transitions. [2023-08-27 01:26:13,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,339 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,339 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 183 flow. Second operand 16 states and 990 transitions. [2023-08-27 01:26:13,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 116 transitions, 858 flow [2023-08-27 01:26:13,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 116 transitions, 844 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-27 01:26:13,345 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 473 flow [2023-08-27 01:26:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=473, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-27 01:26:13,350 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-27 01:26:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 473 flow [2023-08-27 01:26:13,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.142857142857146) internal successors, (814), 14 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:13,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:13,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:13,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:13,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:13,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash -995141119, now seen corresponding path program 4 times [2023-08-27 01:26:13,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:13,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037209441] [2023-08-27 01:26:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:13,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:13,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:13,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037209441] [2023-08-27 01:26:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037209441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608734340] [2023-08-27 01:26:13,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:26:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:13,727 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:13,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 01:26:13,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:26:13,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:13,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:26:13,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:13,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:13,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:13,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608734340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:13,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:13,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 01:26:13,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709774574] [2023-08-27 01:26:13,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:13,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 01:26:13,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:13,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 01:26:13,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-27 01:26:13,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:13,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 473 flow. Second operand has 16 states, 16 states have (on average 58.0) internal successors, (928), 16 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:13,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:13,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:13,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:14,557 INFO L124 PetriNetUnfolderBase]: 281/471 cut-off events. [2023-08-27 01:26:14,557 INFO L125 PetriNetUnfolderBase]: For 3601/3601 co-relation queries the response was YES. [2023-08-27 01:26:14,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 471 events. 281/471 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1712 event pairs, 6 based on Foata normal form. 22/493 useless extension candidates. Maximal degree in co-relation 1892. Up to 167 conditions per place. [2023-08-27 01:26:14,562 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 86 selfloop transitions, 63 changer transitions 1/150 dead transitions. [2023-08-27 01:26:14,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 150 transitions, 1487 flow [2023-08-27 01:26:14,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 01:26:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 01:26:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1286 transitions. [2023-08-27 01:26:14,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42233169129720854 [2023-08-27 01:26:14,567 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1286 transitions. [2023-08-27 01:26:14,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1286 transitions. [2023-08-27 01:26:14,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:14,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1286 transitions. [2023-08-27 01:26:14,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.23809523809524) internal successors, (1286), 21 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,577 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,577 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 473 flow. Second operand 21 states and 1286 transitions. [2023-08-27 01:26:14,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 150 transitions, 1487 flow [2023-08-27 01:26:14,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 150 transitions, 1183 flow, removed 135 selfloop flow, removed 6 redundant places. [2023-08-27 01:26:14,591 INFO L231 Difference]: Finished difference. Result has 80 places, 98 transitions, 905 flow [2023-08-27 01:26:14,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=905, PETRI_PLACES=80, PETRI_TRANSITIONS=98} [2023-08-27 01:26:14,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-08-27 01:26:14,594 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 98 transitions, 905 flow [2023-08-27 01:26:14,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 58.0) internal successors, (928), 16 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:14,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:14,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:14,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:14,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:14,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:14,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1689708043, now seen corresponding path program 5 times [2023-08-27 01:26:14,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546079423] [2023-08-27 01:26:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:14,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546079423] [2023-08-27 01:26:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546079423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507802193] [2023-08-27 01:26:15,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:26:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:15,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:15,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 01:26:15,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:15,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:15,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 01:26:15,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:15,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507802193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:15,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:15,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-27 01:26:15,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649645983] [2023-08-27 01:26:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:26:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:15,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:26:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-08-27 01:26:15,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 98 transitions, 905 flow. Second operand has 14 states, 14 states have (on average 60.857142857142854) internal successors, (852), 14 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:15,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:15,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-08-27 01:26:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:15,802 INFO L124 PetriNetUnfolderBase]: 358/609 cut-off events. [2023-08-27 01:26:15,802 INFO L125 PetriNetUnfolderBase]: For 7423/7423 co-relation queries the response was YES. [2023-08-27 01:26:15,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3432 conditions, 609 events. 358/609 cut-off events. For 7423/7423 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2496 event pairs, 26 based on Foata normal form. 18/627 useless extension candidates. Maximal degree in co-relation 3326. Up to 227 conditions per place. [2023-08-27 01:26:15,808 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 89 selfloop transitions, 83 changer transitions 2/174 dead transitions. [2023-08-27 01:26:15,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 174 transitions, 1835 flow [2023-08-27 01:26:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 01:26:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 01:26:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 957 transitions. [2023-08-27 01:26:15,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-08-27 01:26:15,811 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 957 transitions. [2023-08-27 01:26:15,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 957 transitions. [2023-08-27 01:26:15,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:15,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 957 transitions. [2023-08-27 01:26:15,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 63.8) internal successors, (957), 15 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:15,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 145.0) internal successors, (2320), 16 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:15,817 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 145.0) internal successors, (2320), 16 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:15,818 INFO L175 Difference]: Start difference. First operand has 80 places, 98 transitions, 905 flow. Second operand 15 states and 957 transitions. [2023-08-27 01:26:15,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 174 transitions, 1835 flow [2023-08-27 01:26:15,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 1600 flow, removed 100 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:15,849 INFO L231 Difference]: Finished difference. Result has 94 places, 128 transitions, 1264 flow [2023-08-27 01:26:15,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1264, PETRI_PLACES=94, PETRI_TRANSITIONS=128} [2023-08-27 01:26:15,850 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-08-27 01:26:15,850 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 128 transitions, 1264 flow [2023-08-27 01:26:15,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.857142857142854) internal successors, (852), 14 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:15,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:15,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:15,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 01:26:16,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:16,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:16,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:16,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1196729841, now seen corresponding path program 6 times [2023-08-27 01:26:16,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:16,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124094470] [2023-08-27 01:26:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:16,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124094470] [2023-08-27 01:26:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124094470] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6566106] [2023-08-27 01:26:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:26:16,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:16,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:16,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 01:26:16,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:26:16,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:16,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:26:16,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:16,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6566106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:16,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-27 01:26:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848743151] [2023-08-27 01:26:16,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:16,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:26:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:26:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:16,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-08-27 01:26:16,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 128 transitions, 1264 flow. Second operand has 14 states, 14 states have (on average 60.857142857142854) internal successors, (852), 14 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:16,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:16,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-08-27 01:26:16,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:17,288 INFO L124 PetriNetUnfolderBase]: 382/681 cut-off events. [2023-08-27 01:26:17,288 INFO L125 PetriNetUnfolderBase]: For 11000/11000 co-relation queries the response was YES. [2023-08-27 01:26:17,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 681 events. 382/681 cut-off events. For 11000/11000 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3033 event pairs, 31 based on Foata normal form. 26/707 useless extension candidates. Maximal degree in co-relation 3733. Up to 183 conditions per place. [2023-08-27 01:26:17,295 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 97 selfloop transitions, 105 changer transitions 4/206 dead transitions. [2023-08-27 01:26:17,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 206 transitions, 2151 flow [2023-08-27 01:26:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:26:17,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:26:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1715 transitions. [2023-08-27 01:26:17,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438058748403576 [2023-08-27 01:26:17,300 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1715 transitions. [2023-08-27 01:26:17,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1715 transitions. [2023-08-27 01:26:17,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:17,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1715 transitions. [2023-08-27 01:26:17,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.51851851851852) internal successors, (1715), 27 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,310 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,310 INFO L175 Difference]: Start difference. First operand has 94 places, 128 transitions, 1264 flow. Second operand 27 states and 1715 transitions. [2023-08-27 01:26:17,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 206 transitions, 2151 flow [2023-08-27 01:26:17,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 206 transitions, 1891 flow, removed 118 selfloop flow, removed 4 redundant places. [2023-08-27 01:26:17,376 INFO L231 Difference]: Finished difference. Result has 118 places, 141 transitions, 1459 flow [2023-08-27 01:26:17,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1459, PETRI_PLACES=118, PETRI_TRANSITIONS=141} [2023-08-27 01:26:17,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 98 predicate places. [2023-08-27 01:26:17,377 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 141 transitions, 1459 flow [2023-08-27 01:26:17,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.857142857142854) internal successors, (852), 14 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:17,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:17,581 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:17,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -783036691, now seen corresponding path program 7 times [2023-08-27 01:26:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081983035] [2023-08-27 01:26:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:17,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081983035] [2023-08-27 01:26:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081983035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:17,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433621549] [2023-08-27 01:26:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:26:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:17,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:17,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:17,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 01:26:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:17,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:26:17,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:17,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433621549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:18,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 01:26:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879326198] [2023-08-27 01:26:18,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 01:26:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 01:26:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:26:18,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:18,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 141 transitions, 1459 flow. Second operand has 15 states, 15 states have (on average 58.333333333333336) internal successors, (875), 15 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:18,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:18,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:18,736 INFO L124 PetriNetUnfolderBase]: 530/941 cut-off events. [2023-08-27 01:26:18,736 INFO L125 PetriNetUnfolderBase]: For 10102/10102 co-relation queries the response was YES. [2023-08-27 01:26:18,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 941 events. 530/941 cut-off events. For 10102/10102 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4461 event pairs, 35 based on Foata normal form. 28/969 useless extension candidates. Maximal degree in co-relation 5507. Up to 599 conditions per place. [2023-08-27 01:26:18,747 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 167 selfloop transitions, 94 changer transitions 7/268 dead transitions. [2023-08-27 01:26:18,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 268 transitions, 3216 flow [2023-08-27 01:26:18,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:26:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:26:18,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1359 transitions. [2023-08-27 01:26:18,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4260188087774295 [2023-08-27 01:26:18,752 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1359 transitions. [2023-08-27 01:26:18,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1359 transitions. [2023-08-27 01:26:18,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:18,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1359 transitions. [2023-08-27 01:26:18,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.77272727272727) internal successors, (1359), 22 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:18,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:18,760 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:18,760 INFO L175 Difference]: Start difference. First operand has 118 places, 141 transitions, 1459 flow. Second operand 22 states and 1359 transitions. [2023-08-27 01:26:18,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 268 transitions, 3216 flow [2023-08-27 01:26:18,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 268 transitions, 2915 flow, removed 62 selfloop flow, removed 15 redundant places. [2023-08-27 01:26:18,802 INFO L231 Difference]: Finished difference. Result has 138 places, 204 transitions, 2435 flow [2023-08-27 01:26:18,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2435, PETRI_PLACES=138, PETRI_TRANSITIONS=204} [2023-08-27 01:26:18,802 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-08-27 01:26:18,803 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 204 transitions, 2435 flow [2023-08-27 01:26:18,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.333333333333336) internal successors, (875), 15 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:18,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:18,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:18,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:19,009 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,SelfDestructingSolverStorable9 [2023-08-27 01:26:19,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:19,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:19,010 INFO L85 PathProgramCache]: Analyzing trace with hash 117254159, now seen corresponding path program 8 times [2023-08-27 01:26:19,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:19,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158580768] [2023-08-27 01:26:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:19,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:19,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158580768] [2023-08-27 01:26:19,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158580768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:19,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111356744] [2023-08-27 01:26:19,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:19,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:19,186 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 01:26:19,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:19,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:19,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:26:19,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:19,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:19,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111356744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:19,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:19,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 01:26:19,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269375561] [2023-08-27 01:26:19,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:19,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 01:26:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 01:26:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:26:19,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:19,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 204 transitions, 2435 flow. Second operand has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:19,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:19,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:19,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:20,269 INFO L124 PetriNetUnfolderBase]: 666/1191 cut-off events. [2023-08-27 01:26:20,270 INFO L125 PetriNetUnfolderBase]: For 20525/20525 co-relation queries the response was YES. [2023-08-27 01:26:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8253 conditions, 1191 events. 666/1191 cut-off events. For 20525/20525 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6117 event pairs, 30 based on Foata normal form. 24/1215 useless extension candidates. Maximal degree in co-relation 7961. Up to 725 conditions per place. [2023-08-27 01:26:20,286 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 208 selfloop transitions, 131 changer transitions 5/344 dead transitions. [2023-08-27 01:26:20,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 344 transitions, 4642 flow [2023-08-27 01:26:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:26:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:26:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1654 transitions. [2023-08-27 01:26:20,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42247765006385696 [2023-08-27 01:26:20,290 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1654 transitions. [2023-08-27 01:26:20,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1654 transitions. [2023-08-27 01:26:20,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:20,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1654 transitions. [2023-08-27 01:26:20,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.25925925925926) internal successors, (1654), 27 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:20,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:20,297 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:20,298 INFO L175 Difference]: Start difference. First operand has 138 places, 204 transitions, 2435 flow. Second operand 27 states and 1654 transitions. [2023-08-27 01:26:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 344 transitions, 4642 flow [2023-08-27 01:26:20,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 344 transitions, 4192 flow, removed 221 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:20,376 INFO L231 Difference]: Finished difference. Result has 180 places, 265 transitions, 3485 flow [2023-08-27 01:26:20,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3485, PETRI_PLACES=180, PETRI_TRANSITIONS=265} [2023-08-27 01:26:20,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 160 predicate places. [2023-08-27 01:26:20,377 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 265 transitions, 3485 flow [2023-08-27 01:26:20,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.266666666666666) internal successors, (874), 15 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:20,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:20,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:20,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 01:26:20,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:20,584 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:20,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1978127291, now seen corresponding path program 9 times [2023-08-27 01:26:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:20,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755052860] [2023-08-27 01:26:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:20,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:20,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755052860] [2023-08-27 01:26:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755052860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867592683] [2023-08-27 01:26:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:26:20,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:20,743 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:20,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 01:26:20,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:26:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:20,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:26:20,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:20,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:21,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867592683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:21,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:21,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 01:26:21,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750873963] [2023-08-27 01:26:21,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:21,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:26:21,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:21,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:26:21,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:21,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-08-27 01:26:21,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 265 transitions, 3485 flow. Second operand has 14 states, 14 states have (on average 60.785714285714285) internal successors, (851), 14 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:21,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:21,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-08-27 01:26:21,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:21,655 INFO L124 PetriNetUnfolderBase]: 795/1376 cut-off events. [2023-08-27 01:26:21,655 INFO L125 PetriNetUnfolderBase]: For 32786/32786 co-relation queries the response was YES. [2023-08-27 01:26:21,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11055 conditions, 1376 events. 795/1376 cut-off events. For 32786/32786 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7063 event pairs, 168 based on Foata normal form. 22/1398 useless extension candidates. Maximal degree in co-relation 10692. Up to 1040 conditions per place. [2023-08-27 01:26:21,673 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 203 selfloop transitions, 139 changer transitions 10/352 dead transitions. [2023-08-27 01:26:21,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 352 transitions, 5637 flow [2023-08-27 01:26:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 01:26:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 01:26:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1077 transitions. [2023-08-27 01:26:21,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43691683569979717 [2023-08-27 01:26:21,676 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1077 transitions. [2023-08-27 01:26:21,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1077 transitions. [2023-08-27 01:26:21,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:21,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1077 transitions. [2023-08-27 01:26:21,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.35294117647059) internal successors, (1077), 17 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2023-08-27 01:26:21,681 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2023-08-27 01:26:21,681 INFO L175 Difference]: Start difference. First operand has 180 places, 265 transitions, 3485 flow. Second operand 17 states and 1077 transitions. [2023-08-27 01:26:21,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 352 transitions, 5637 flow [2023-08-27 01:26:21,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 352 transitions, 4797 flow, removed 414 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:21,793 INFO L231 Difference]: Finished difference. Result has 207 places, 319 transitions, 4357 flow [2023-08-27 01:26:21,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4357, PETRI_PLACES=207, PETRI_TRANSITIONS=319} [2023-08-27 01:26:21,793 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2023-08-27 01:26:21,794 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 319 transitions, 4357 flow [2023-08-27 01:26:21,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.785714285714285) internal successors, (851), 14 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:21,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:21,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:21,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:21,995 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,SelfDestructingSolverStorable11 [2023-08-27 01:26:21,995 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:21,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:21,995 INFO L85 PathProgramCache]: Analyzing trace with hash 582881223, now seen corresponding path program 10 times [2023-08-27 01:26:21,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:21,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477180422] [2023-08-27 01:26:21,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:22,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:22,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477180422] [2023-08-27 01:26:22,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477180422] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:22,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686623095] [2023-08-27 01:26:22,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:26:22,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:22,149 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:22,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 01:26:22,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:26:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:22,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:26:22,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:22,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:22,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:22,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686623095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:22,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:22,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 01:26:22,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892799997] [2023-08-27 01:26:22,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:22,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:26:22,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:26:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:22,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-08-27 01:26:22,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 319 transitions, 4357 flow. Second operand has 14 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:22,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:22,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-08-27 01:26:22,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:23,079 INFO L124 PetriNetUnfolderBase]: 801/1412 cut-off events. [2023-08-27 01:26:23,080 INFO L125 PetriNetUnfolderBase]: For 35573/35573 co-relation queries the response was YES. [2023-08-27 01:26:23,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11051 conditions, 1412 events. 801/1412 cut-off events. For 35573/35573 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7426 event pairs, 148 based on Foata normal form. 24/1436 useless extension candidates. Maximal degree in co-relation 10886. Up to 940 conditions per place. [2023-08-27 01:26:23,101 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 203 selfloop transitions, 167 changer transitions 1/371 dead transitions. [2023-08-27 01:26:23,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 371 transitions, 5419 flow [2023-08-27 01:26:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 01:26:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 01:26:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1272 transitions. [2023-08-27 01:26:23,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386206896551724 [2023-08-27 01:26:23,103 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1272 transitions. [2023-08-27 01:26:23,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1272 transitions. [2023-08-27 01:26:23,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:23,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1272 transitions. [2023-08-27 01:26:23,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.6) internal successors, (1272), 20 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:23,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 145.0) internal successors, (3045), 21 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:23,108 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 145.0) internal successors, (3045), 21 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:23,108 INFO L175 Difference]: Start difference. First operand has 207 places, 319 transitions, 4357 flow. Second operand 20 states and 1272 transitions. [2023-08-27 01:26:23,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 371 transitions, 5419 flow [2023-08-27 01:26:23,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 371 transitions, 5137 flow, removed 124 selfloop flow, removed 6 redundant places. [2023-08-27 01:26:23,232 INFO L231 Difference]: Finished difference. Result has 218 places, 330 transitions, 4572 flow [2023-08-27 01:26:23,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3929, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4572, PETRI_PLACES=218, PETRI_TRANSITIONS=330} [2023-08-27 01:26:23,233 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-08-27 01:26:23,233 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 330 transitions, 4572 flow [2023-08-27 01:26:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.0) internal successors, (854), 14 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:23,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:23,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:23,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:23,434 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,SelfDestructingSolverStorable12 [2023-08-27 01:26:23,434 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:23,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash -869855272, now seen corresponding path program 11 times [2023-08-27 01:26:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017030011] [2023-08-27 01:26:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:23,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017030011] [2023-08-27 01:26:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017030011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953476058] [2023-08-27 01:26:23,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:26:23,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:23,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:23,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 01:26:23,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:26:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:23,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:26:23,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:26,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953476058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:31,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:31,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-27 01:26:31,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775534200] [2023-08-27 01:26:31,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:31,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 01:26:31,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:31,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 01:26:31,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=225, Unknown=1, NotChecked=0, Total=306 [2023-08-27 01:26:31,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:31,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 330 transitions, 4572 flow. Second operand has 18 states, 18 states have (on average 56.55555555555556) internal successors, (1018), 18 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:31,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:31,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:31,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:32,909 INFO L124 PetriNetUnfolderBase]: 1060/1940 cut-off events. [2023-08-27 01:26:32,910 INFO L125 PetriNetUnfolderBase]: For 41164/41164 co-relation queries the response was YES. [2023-08-27 01:26:32,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15294 conditions, 1940 events. 1060/1940 cut-off events. For 41164/41164 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11496 event pairs, 40 based on Foata normal form. 3/1943 useless extension candidates. Maximal degree in co-relation 14761. Up to 965 conditions per place. [2023-08-27 01:26:32,930 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 303 selfloop transitions, 127 changer transitions 60/490 dead transitions. [2023-08-27 01:26:32,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 490 transitions, 7698 flow [2023-08-27 01:26:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 01:26:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 01:26:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 794 transitions. [2023-08-27 01:26:32,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42122015915119365 [2023-08-27 01:26:32,932 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 794 transitions. [2023-08-27 01:26:32,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 794 transitions. [2023-08-27 01:26:32,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:32,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 794 transitions. [2023-08-27 01:26:32,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 61.07692307692308) internal successors, (794), 13 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:32,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 145.0) internal successors, (2030), 14 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:32,936 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 145.0) internal successors, (2030), 14 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:32,936 INFO L175 Difference]: Start difference. First operand has 218 places, 330 transitions, 4572 flow. Second operand 13 states and 794 transitions. [2023-08-27 01:26:32,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 490 transitions, 7698 flow [2023-08-27 01:26:33,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 490 transitions, 7421 flow, removed 38 selfloop flow, removed 12 redundant places. [2023-08-27 01:26:33,100 INFO L231 Difference]: Finished difference. Result has 226 places, 361 transitions, 5418 flow [2023-08-27 01:26:33,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5418, PETRI_PLACES=226, PETRI_TRANSITIONS=361} [2023-08-27 01:26:33,101 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-27 01:26:33,101 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 361 transitions, 5418 flow [2023-08-27 01:26:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.55555555555556) internal successors, (1018), 18 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:33,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:33,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:33,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:33,307 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,SelfDestructingSolverStorable13 [2023-08-27 01:26:33,307 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:33,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash 336064526, now seen corresponding path program 12 times [2023-08-27 01:26:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:33,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347815700] [2023-08-27 01:26:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:33,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:33,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347815700] [2023-08-27 01:26:33,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347815700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:33,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178097769] [2023-08-27 01:26:33,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:26:33,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:33,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:33,608 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:33,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 01:26:33,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:26:33,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:33,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 01:26:33,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:33,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:34,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178097769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:34,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:34,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2023-08-27 01:26:34,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187229558] [2023-08-27 01:26:34,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:34,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 01:26:34,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:34,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 01:26:34,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:26:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 361 transitions, 5418 flow. Second operand has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:34,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:34,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:38,542 INFO L124 PetriNetUnfolderBase]: 1194/2133 cut-off events. [2023-08-27 01:26:38,542 INFO L125 PetriNetUnfolderBase]: For 53762/53762 co-relation queries the response was YES. [2023-08-27 01:26:38,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18969 conditions, 2133 events. 1194/2133 cut-off events. For 53762/53762 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 12522 event pairs, 23 based on Foata normal form. 18/2151 useless extension candidates. Maximal degree in co-relation 18413. Up to 1424 conditions per place. [2023-08-27 01:26:38,571 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 301 selfloop transitions, 248 changer transitions 24/573 dead transitions. [2023-08-27 01:26:38,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 573 transitions, 10174 flow [2023-08-27 01:26:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:26:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:26:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2392 transitions. [2023-08-27 01:26:38,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40235492010092516 [2023-08-27 01:26:38,575 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2392 transitions. [2023-08-27 01:26:38,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2392 transitions. [2023-08-27 01:26:38,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:38,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2392 transitions. [2023-08-27 01:26:38,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.34146341463415) internal successors, (2392), 41 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:38,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:38,586 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:38,586 INFO L175 Difference]: Start difference. First operand has 226 places, 361 transitions, 5418 flow. Second operand 41 states and 2392 transitions. [2023-08-27 01:26:38,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 573 transitions, 10174 flow [2023-08-27 01:26:38,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 573 transitions, 9996 flow, removed 71 selfloop flow, removed 7 redundant places. [2023-08-27 01:26:38,805 INFO L231 Difference]: Finished difference. Result has 268 places, 481 transitions, 8847 flow [2023-08-27 01:26:38,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8847, PETRI_PLACES=268, PETRI_TRANSITIONS=481} [2023-08-27 01:26:38,806 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 248 predicate places. [2023-08-27 01:26:38,806 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 481 transitions, 8847 flow [2023-08-27 01:26:38,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.904761904761905) internal successors, (1174), 21 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:38,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:38,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:38,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:39,007 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,SelfDestructingSolverStorable14 [2023-08-27 01:26:39,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:39,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1382873826, now seen corresponding path program 13 times [2023-08-27 01:26:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:39,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3930232] [2023-08-27 01:26:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:39,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3930232] [2023-08-27 01:26:39,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3930232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:39,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546399907] [2023-08-27 01:26:39,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:26:39,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:39,305 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:39,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 01:26:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:39,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:26:39,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:39,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546399907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:39,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:39,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-08-27 01:26:39,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247443259] [2023-08-27 01:26:39,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:26:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:39,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:26:39,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:26:39,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:39,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 481 transitions, 8847 flow. Second operand has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:39,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:39,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:39,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:41,079 INFO L124 PetriNetUnfolderBase]: 1145/2066 cut-off events. [2023-08-27 01:26:41,079 INFO L125 PetriNetUnfolderBase]: For 63103/63103 co-relation queries the response was YES. [2023-08-27 01:26:41,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19206 conditions, 2066 events. 1145/2066 cut-off events. For 63103/63103 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12163 event pairs, 19 based on Foata normal form. 64/2130 useless extension candidates. Maximal degree in co-relation 18640. Up to 1267 conditions per place. [2023-08-27 01:26:41,108 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 344 selfloop transitions, 183 changer transitions 32/559 dead transitions. [2023-08-27 01:26:41,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 559 transitions, 10868 flow [2023-08-27 01:26:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 01:26:41,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 01:26:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1540 transitions. [2023-08-27 01:26:41,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848806366047746 [2023-08-27 01:26:41,119 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1540 transitions. [2023-08-27 01:26:41,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1540 transitions. [2023-08-27 01:26:41,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:41,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1540 transitions. [2023-08-27 01:26:41,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 59.23076923076923) internal successors, (1540), 26 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:41,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:41,131 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:41,131 INFO L175 Difference]: Start difference. First operand has 268 places, 481 transitions, 8847 flow. Second operand 26 states and 1540 transitions. [2023-08-27 01:26:41,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 559 transitions, 10868 flow [2023-08-27 01:26:41,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 559 transitions, 9456 flow, removed 652 selfloop flow, removed 14 redundant places. [2023-08-27 01:26:41,434 INFO L231 Difference]: Finished difference. Result has 272 places, 470 transitions, 7874 flow [2023-08-27 01:26:41,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7874, PETRI_PLACES=272, PETRI_TRANSITIONS=470} [2023-08-27 01:26:41,435 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2023-08-27 01:26:41,435 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 470 transitions, 7874 flow [2023-08-27 01:26:41,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.10526315789474) internal successors, (1066), 19 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:41,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:41,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:41,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:41,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:41,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:41,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash -183311624, now seen corresponding path program 14 times [2023-08-27 01:26:41,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:41,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309448131] [2023-08-27 01:26:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:41,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309448131] [2023-08-27 01:26:41,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309448131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:41,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695192874] [2023-08-27 01:26:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:41,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:41,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 01:26:42,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:26:42,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:42,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:26:42,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:42,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:42,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695192874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:42,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:42,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-08-27 01:26:42,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703252471] [2023-08-27 01:26:42,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:42,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:26:42,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:26:42,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:26:42,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:42,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 470 transitions, 7874 flow. Second operand has 19 states, 19 states have (on average 57.78947368421053) internal successors, (1098), 19 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:42,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:42,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:42,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:44,623 INFO L124 PetriNetUnfolderBase]: 1263/2221 cut-off events. [2023-08-27 01:26:44,623 INFO L125 PetriNetUnfolderBase]: For 43790/43790 co-relation queries the response was YES. [2023-08-27 01:26:44,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19614 conditions, 2221 events. 1263/2221 cut-off events. For 43790/43790 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12915 event pairs, 41 based on Foata normal form. 40/2261 useless extension candidates. Maximal degree in co-relation 19287. Up to 1578 conditions per place. [2023-08-27 01:26:44,646 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 302 selfloop transitions, 247 changer transitions 10/559 dead transitions. [2023-08-27 01:26:44,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 559 transitions, 10650 flow [2023-08-27 01:26:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 01:26:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 01:26:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1264 transitions. [2023-08-27 01:26:44,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151067323481117 [2023-08-27 01:26:44,648 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1264 transitions. [2023-08-27 01:26:44,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1264 transitions. [2023-08-27 01:26:44,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:44,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1264 transitions. [2023-08-27 01:26:44,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.19047619047619) internal successors, (1264), 21 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,654 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,654 INFO L175 Difference]: Start difference. First operand has 272 places, 470 transitions, 7874 flow. Second operand 21 states and 1264 transitions. [2023-08-27 01:26:44,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 559 transitions, 10650 flow [2023-08-27 01:26:44,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 559 transitions, 9852 flow, removed 258 selfloop flow, removed 23 redundant places. [2023-08-27 01:26:44,938 INFO L231 Difference]: Finished difference. Result has 274 places, 506 transitions, 8933 flow [2023-08-27 01:26:44,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7112, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8933, PETRI_PLACES=274, PETRI_TRANSITIONS=506} [2023-08-27 01:26:44,938 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 254 predicate places. [2023-08-27 01:26:44,938 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 506 transitions, 8933 flow [2023-08-27 01:26:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.78947368421053) internal successors, (1098), 19 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:44,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:44,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:44,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:45,144 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,SelfDestructingSolverStorable16 [2023-08-27 01:26:45,144 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:45,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:45,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1390679856, now seen corresponding path program 15 times [2023-08-27 01:26:45,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:45,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490177043] [2023-08-27 01:26:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490177043] [2023-08-27 01:26:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490177043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884353629] [2023-08-27 01:26:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:26:45,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:45,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:45,387 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:45,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 01:26:45,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:26:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:45,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:26:45,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:45,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:45,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884353629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:45,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:45,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 01:26:45,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753629418] [2023-08-27 01:26:45,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:26:45,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:26:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:26:45,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:26:45,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 506 transitions, 8933 flow. Second operand has 20 states, 20 states have (on average 58.0) internal successors, (1160), 20 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:45,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:45,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:26:45,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:47,335 INFO L124 PetriNetUnfolderBase]: 1304/2286 cut-off events. [2023-08-27 01:26:47,335 INFO L125 PetriNetUnfolderBase]: For 50918/50918 co-relation queries the response was YES. [2023-08-27 01:26:47,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20863 conditions, 2286 events. 1304/2286 cut-off events. For 50918/50918 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 13279 event pairs, 27 based on Foata normal form. 54/2340 useless extension candidates. Maximal degree in co-relation 20752. Up to 1624 conditions per place. [2023-08-27 01:26:47,357 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 355 selfloop transitions, 225 changer transitions 2/582 dead transitions. [2023-08-27 01:26:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 582 transitions, 11339 flow [2023-08-27 01:26:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 01:26:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 01:26:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1272 transitions. [2023-08-27 01:26:47,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41773399014778323 [2023-08-27 01:26:47,360 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1272 transitions. [2023-08-27 01:26:47,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1272 transitions. [2023-08-27 01:26:47,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:47,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1272 transitions. [2023-08-27 01:26:47,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.57142857142857) internal successors, (1272), 21 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:47,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:47,365 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 145.0) internal successors, (3190), 22 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:47,365 INFO L175 Difference]: Start difference. First operand has 274 places, 506 transitions, 8933 flow. Second operand 21 states and 1272 transitions. [2023-08-27 01:26:47,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 582 transitions, 11339 flow [2023-08-27 01:26:47,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 582 transitions, 10734 flow, removed 256 selfloop flow, removed 16 redundant places. [2023-08-27 01:26:47,647 INFO L231 Difference]: Finished difference. Result has 279 places, 536 transitions, 9975 flow [2023-08-27 01:26:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=9975, PETRI_PLACES=279, PETRI_TRANSITIONS=536} [2023-08-27 01:26:47,647 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 259 predicate places. [2023-08-27 01:26:47,648 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 536 transitions, 9975 flow [2023-08-27 01:26:47,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.0) internal successors, (1160), 20 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:47,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:47,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:47,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:47,848 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,SelfDestructingSolverStorable17 [2023-08-27 01:26:47,849 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:47,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:47,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1141947990, now seen corresponding path program 16 times [2023-08-27 01:26:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:47,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765253858] [2023-08-27 01:26:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:47,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:48,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765253858] [2023-08-27 01:26:48,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765253858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:48,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931203982] [2023-08-27 01:26:48,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:26:48,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:48,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:48,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:48,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 01:26:48,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:26:48,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:48,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:26:48,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:48,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:48,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931203982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:48,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:48,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-27 01:26:48,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715187342] [2023-08-27 01:26:48,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:48,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 01:26:48,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:48,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 01:26:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-27 01:26:48,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:48,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 536 transitions, 9975 flow. Second operand has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:48,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:48,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:48,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:50,408 INFO L124 PetriNetUnfolderBase]: 1869/3157 cut-off events. [2023-08-27 01:26:50,408 INFO L125 PetriNetUnfolderBase]: For 63026/63026 co-relation queries the response was YES. [2023-08-27 01:26:50,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29709 conditions, 3157 events. 1869/3157 cut-off events. For 63026/63026 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18637 event pairs, 25 based on Foata normal form. 28/3185 useless extension candidates. Maximal degree in co-relation 29057. Up to 1040 conditions per place. [2023-08-27 01:26:50,437 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 431 selfloop transitions, 438 changer transitions 5/874 dead transitions. [2023-08-27 01:26:50,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 874 transitions, 17209 flow [2023-08-27 01:26:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 01:26:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 01:26:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2167 transitions. [2023-08-27 01:26:50,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039142590866729 [2023-08-27 01:26:50,440 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2167 transitions. [2023-08-27 01:26:50,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2167 transitions. [2023-08-27 01:26:50,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:50,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2167 transitions. [2023-08-27 01:26:50,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 58.567567567567565) internal successors, (2167), 37 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:50,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:50,448 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:50,449 INFO L175 Difference]: Start difference. First operand has 279 places, 536 transitions, 9975 flow. Second operand 37 states and 2167 transitions. [2023-08-27 01:26:50,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 874 transitions, 17209 flow [2023-08-27 01:26:50,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 874 transitions, 16679 flow, removed 196 selfloop flow, removed 15 redundant places. [2023-08-27 01:26:50,810 INFO L231 Difference]: Finished difference. Result has 315 places, 727 transitions, 14490 flow [2023-08-27 01:26:50,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=9522, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14490, PETRI_PLACES=315, PETRI_TRANSITIONS=727} [2023-08-27 01:26:50,811 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2023-08-27 01:26:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 727 transitions, 14490 flow [2023-08-27 01:26:50,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.111111111111114) internal successors, (1010), 18 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:50,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:50,812 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:50,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:51,012 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:51,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1810529652, now seen corresponding path program 17 times [2023-08-27 01:26:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521789705] [2023-08-27 01:26:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:51,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521789705] [2023-08-27 01:26:51,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521789705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:51,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366563354] [2023-08-27 01:26:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:26:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:51,305 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:51,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 01:26:51,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:26:51,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:51,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:26:51,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366563354] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:51,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:51,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 01:26:51,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27336771] [2023-08-27 01:26:51,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 01:26:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 01:26:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:26:51,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:51,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 727 transitions, 14490 flow. Second operand has 22 states, 22 states have (on average 56.04545454545455) internal successors, (1233), 22 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:51,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:51,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:54,567 INFO L124 PetriNetUnfolderBase]: 1972/3328 cut-off events. [2023-08-27 01:26:54,567 INFO L125 PetriNetUnfolderBase]: For 74506/74506 co-relation queries the response was YES. [2023-08-27 01:26:54,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33643 conditions, 3328 events. 1972/3328 cut-off events. For 74506/74506 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 19776 event pairs, 40 based on Foata normal form. 32/3360 useless extension candidates. Maximal degree in co-relation 33127. Up to 1217 conditions per place. [2023-08-27 01:26:54,600 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 449 selfloop transitions, 470 changer transitions 0/919 dead transitions. [2023-08-27 01:26:54,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 919 transitions, 19390 flow [2023-08-27 01:26:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:26:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:26:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2404 transitions. [2023-08-27 01:26:54,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043734230445753 [2023-08-27 01:26:54,603 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2404 transitions. [2023-08-27 01:26:54,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2404 transitions. [2023-08-27 01:26:54,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:54,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2404 transitions. [2023-08-27 01:26:54,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.63414634146341) internal successors, (2404), 41 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:54,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:54,612 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:54,612 INFO L175 Difference]: Start difference. First operand has 315 places, 727 transitions, 14490 flow. Second operand 41 states and 2404 transitions. [2023-08-27 01:26:54,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 919 transitions, 19390 flow [2023-08-27 01:26:55,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 919 transitions, 18390 flow, removed 470 selfloop flow, removed 4 redundant places. [2023-08-27 01:26:55,174 INFO L231 Difference]: Finished difference. Result has 361 places, 786 transitions, 16200 flow [2023-08-27 01:26:55,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=13805, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=16200, PETRI_PLACES=361, PETRI_TRANSITIONS=786} [2023-08-27 01:26:55,175 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 341 predicate places. [2023-08-27 01:26:55,175 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 786 transitions, 16200 flow [2023-08-27 01:26:55,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.04545454545455) internal successors, (1233), 22 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:55,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:55,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:55,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:55,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:55,377 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:55,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 974679706, now seen corresponding path program 18 times [2023-08-27 01:26:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:55,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782311202] [2023-08-27 01:26:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782311202] [2023-08-27 01:26:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782311202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867592456] [2023-08-27 01:26:55,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:26:55,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:55,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:55,653 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:55,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 01:26:55,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 01:26:55,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:55,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:26:55,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:55,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:56,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867592456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:56,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:56,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-08-27 01:26:56,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537225115] [2023-08-27 01:26:56,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:56,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:26:56,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:56,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:26:56,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:26:56,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:26:56,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 786 transitions, 16200 flow. Second operand has 20 states, 20 states have (on average 55.95) internal successors, (1119), 20 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:56,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:56,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:26:56,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:58,364 INFO L124 PetriNetUnfolderBase]: 2235/3837 cut-off events. [2023-08-27 01:26:58,364 INFO L125 PetriNetUnfolderBase]: For 101485/101485 co-relation queries the response was YES. [2023-08-27 01:26:58,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 3837 events. 2235/3837 cut-off events. For 101485/101485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 24256 event pairs, 73 based on Foata normal form. 38/3875 useless extension candidates. Maximal degree in co-relation 39017. Up to 1406 conditions per place. [2023-08-27 01:26:58,405 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 468 selfloop transitions, 504 changer transitions 2/974 dead transitions. [2023-08-27 01:26:58,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 974 transitions, 21670 flow [2023-08-27 01:26:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:26:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:26:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1646 transitions. [2023-08-27 01:26:58,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40541871921182265 [2023-08-27 01:26:58,408 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1646 transitions. [2023-08-27 01:26:58,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1646 transitions. [2023-08-27 01:26:58,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:58,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1646 transitions. [2023-08-27 01:26:58,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.785714285714285) internal successors, (1646), 28 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,413 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,414 INFO L175 Difference]: Start difference. First operand has 361 places, 786 transitions, 16200 flow. Second operand 28 states and 1646 transitions. [2023-08-27 01:26:58,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 974 transitions, 21670 flow [2023-08-27 01:26:58,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 974 transitions, 20788 flow, removed 363 selfloop flow, removed 12 redundant places. [2023-08-27 01:26:59,080 INFO L231 Difference]: Finished difference. Result has 384 places, 892 transitions, 19482 flow [2023-08-27 01:26:59,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=15464, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=19482, PETRI_PLACES=384, PETRI_TRANSITIONS=892} [2023-08-27 01:26:59,082 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 364 predicate places. [2023-08-27 01:26:59,082 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 892 transitions, 19482 flow [2023-08-27 01:26:59,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.95) internal successors, (1119), 20 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:59,082 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:59,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:59,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,288 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:26:59,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:59,289 INFO L85 PathProgramCache]: Analyzing trace with hash -999085040, now seen corresponding path program 19 times [2023-08-27 01:26:59,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:59,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926095503] [2023-08-27 01:26:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:59,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:59,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926095503] [2023-08-27 01:26:59,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926095503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:59,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546509736] [2023-08-27 01:26:59,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:26:59,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:59,681 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:59,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 01:26:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:26:59,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:00,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:00,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546509736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:00,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:00,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 01:27:00,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984955208] [2023-08-27 01:27:00,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:00,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 01:27:00,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 01:27:00,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:27:00,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:27:00,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 892 transitions, 19482 flow. Second operand has 22 states, 22 states have (on average 58.04545454545455) internal successors, (1277), 22 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:00,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:27:00,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:03,077 INFO L124 PetriNetUnfolderBase]: 2315/4021 cut-off events. [2023-08-27 01:27:03,077 INFO L125 PetriNetUnfolderBase]: For 122954/122954 co-relation queries the response was YES. [2023-08-27 01:27:03,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43016 conditions, 4021 events. 2315/4021 cut-off events. For 122954/122954 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 25936 event pairs, 50 based on Foata normal form. 42/4063 useless extension candidates. Maximal degree in co-relation 42304. Up to 1346 conditions per place. [2023-08-27 01:27:03,124 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 487 selfloop transitions, 513 changer transitions 6/1006 dead transitions. [2023-08-27 01:27:03,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1006 transitions, 22898 flow [2023-08-27 01:27:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 01:27:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 01:27:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2424 transitions. [2023-08-27 01:27:03,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41793103448275865 [2023-08-27 01:27:03,126 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2424 transitions. [2023-08-27 01:27:03,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2424 transitions. [2023-08-27 01:27:03,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:03,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2424 transitions. [2023-08-27 01:27:03,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.6) internal successors, (2424), 40 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,134 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,134 INFO L175 Difference]: Start difference. First operand has 384 places, 892 transitions, 19482 flow. Second operand 40 states and 2424 transitions. [2023-08-27 01:27:03,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1006 transitions, 22898 flow [2023-08-27 01:27:04,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1006 transitions, 22077 flow, removed 341 selfloop flow, removed 13 redundant places. [2023-08-27 01:27:04,094 INFO L231 Difference]: Finished difference. Result has 415 places, 910 transitions, 20393 flow [2023-08-27 01:27:04,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18550, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20393, PETRI_PLACES=415, PETRI_TRANSITIONS=910} [2023-08-27 01:27:04,095 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 395 predicate places. [2023-08-27 01:27:04,095 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 910 transitions, 20393 flow [2023-08-27 01:27:04,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 58.04545454545455) internal successors, (1277), 22 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:04,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:04,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:04,301 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,SelfDestructingSolverStorable21 [2023-08-27 01:27:04,301 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:04,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1559030626, now seen corresponding path program 20 times [2023-08-27 01:27:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697314258] [2023-08-27 01:27:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:04,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697314258] [2023-08-27 01:27:04,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697314258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:04,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083869019] [2023-08-27 01:27:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:04,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:04,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:04,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:04,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 01:27:04,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:04,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:04,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:27:04,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:04,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083869019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:05,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-27 01:27:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092049960] [2023-08-27 01:27:05,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:05,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:27:05,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:27:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:27:05,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:27:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 910 transitions, 20393 flow. Second operand has 20 states, 20 states have (on average 55.75) internal successors, (1115), 20 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:05,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:27:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:07,978 INFO L124 PetriNetUnfolderBase]: 2506/4256 cut-off events. [2023-08-27 01:27:07,978 INFO L125 PetriNetUnfolderBase]: For 129853/129853 co-relation queries the response was YES. [2023-08-27 01:27:08,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47945 conditions, 4256 events. 2506/4256 cut-off events. For 129853/129853 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 27257 event pairs, 176 based on Foata normal form. 38/4294 useless extension candidates. Maximal degree in co-relation 47405. Up to 2000 conditions per place. [2023-08-27 01:27:08,029 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 419 selfloop transitions, 698 changer transitions 11/1128 dead transitions. [2023-08-27 01:27:08,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1128 transitions, 26971 flow [2023-08-27 01:27:08,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 01:27:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 01:27:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2273 transitions. [2023-08-27 01:27:08,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019451812555261 [2023-08-27 01:27:08,031 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2273 transitions. [2023-08-27 01:27:08,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2273 transitions. [2023-08-27 01:27:08,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:08,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2273 transitions. [2023-08-27 01:27:08,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 58.282051282051285) internal successors, (2273), 39 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,038 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,038 INFO L175 Difference]: Start difference. First operand has 415 places, 910 transitions, 20393 flow. Second operand 39 states and 2273 transitions. [2023-08-27 01:27:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1128 transitions, 26971 flow [2023-08-27 01:27:09,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1128 transitions, 26088 flow, removed 244 selfloop flow, removed 22 redundant places. [2023-08-27 01:27:09,048 INFO L231 Difference]: Finished difference. Result has 438 places, 1020 transitions, 24488 flow [2023-08-27 01:27:09,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19447, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24488, PETRI_PLACES=438, PETRI_TRANSITIONS=1020} [2023-08-27 01:27:09,049 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 418 predicate places. [2023-08-27 01:27:09,049 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1020 transitions, 24488 flow [2023-08-27 01:27:09,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.75) internal successors, (1115), 20 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:09,050 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:09,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-27 01:27:09,257 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,SelfDestructingSolverStorable22 [2023-08-27 01:27:09,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:09,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:09,258 INFO L85 PathProgramCache]: Analyzing trace with hash -655482938, now seen corresponding path program 21 times [2023-08-27 01:27:09,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:09,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609500599] [2023-08-27 01:27:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:09,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:09,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:09,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609500599] [2023-08-27 01:27:09,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609500599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130829993] [2023-08-27 01:27:09,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:09,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:09,800 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:09,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 01:27:09,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 01:27:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:09,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:27:09,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:10,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:10,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130829993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:10,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:10,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-08-27 01:27:10,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905035850] [2023-08-27 01:27:10,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:10,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:27:10,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:10,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:27:10,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-08-27 01:27:10,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:27:10,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1020 transitions, 24488 flow. Second operand has 24 states, 24 states have (on average 55.791666666666664) internal successors, (1339), 24 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:10,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:27:10,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:16,400 INFO L124 PetriNetUnfolderBase]: 2968/5008 cut-off events. [2023-08-27 01:27:16,400 INFO L125 PetriNetUnfolderBase]: For 184435/184435 co-relation queries the response was YES. [2023-08-27 01:27:16,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59089 conditions, 5008 events. 2968/5008 cut-off events. For 184435/184435 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 32340 event pairs, 79 based on Foata normal form. 50/5058 useless extension candidates. Maximal degree in co-relation 58436. Up to 3456 conditions per place. [2023-08-27 01:27:16,466 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 798 selfloop transitions, 519 changer transitions 6/1323 dead transitions. [2023-08-27 01:27:16,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1323 transitions, 34034 flow [2023-08-27 01:27:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 01:27:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 01:27:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2752 transitions. [2023-08-27 01:27:16,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038151137197359 [2023-08-27 01:27:16,469 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2752 transitions. [2023-08-27 01:27:16,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2752 transitions. [2023-08-27 01:27:16,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:16,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2752 transitions. [2023-08-27 01:27:16,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 58.5531914893617) internal successors, (2752), 47 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,478 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 145.0) internal successors, (6960), 48 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,478 INFO L175 Difference]: Start difference. First operand has 438 places, 1020 transitions, 24488 flow. Second operand 47 states and 2752 transitions. [2023-08-27 01:27:16,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1323 transitions, 34034 flow [2023-08-27 01:27:18,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1323 transitions, 32671 flow, removed 522 selfloop flow, removed 21 redundant places. [2023-08-27 01:27:18,265 INFO L231 Difference]: Finished difference. Result has 482 places, 1203 transitions, 30187 flow [2023-08-27 01:27:18,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23342, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=30187, PETRI_PLACES=482, PETRI_TRANSITIONS=1203} [2023-08-27 01:27:18,267 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 462 predicate places. [2023-08-27 01:27:18,267 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1203 transitions, 30187 flow [2023-08-27 01:27:18,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.791666666666664) internal successors, (1339), 24 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:18,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:18,268 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:18,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-27 01:27:18,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:18,482 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:18,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1659080130, now seen corresponding path program 22 times [2023-08-27 01:27:18,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:18,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545829730] [2023-08-27 01:27:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:18,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545829730] [2023-08-27 01:27:18,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545829730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853839801] [2023-08-27 01:27:18,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:18,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:18,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:18,805 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:18,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 01:27:18,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:18,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:18,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:27:18,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:19,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:19,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853839801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:19,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:19,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-27 01:27:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297612079] [2023-08-27 01:27:19,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:19,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 01:27:19,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 01:27:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-08-27 01:27:19,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:27:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1203 transitions, 30187 flow. Second operand has 23 states, 23 states have (on average 57.95652173913044) internal successors, (1333), 23 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:27:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:23,320 INFO L124 PetriNetUnfolderBase]: 3086/5240 cut-off events. [2023-08-27 01:27:23,321 INFO L125 PetriNetUnfolderBase]: For 194612/194612 co-relation queries the response was YES. [2023-08-27 01:27:23,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62791 conditions, 5240 events. 3086/5240 cut-off events. For 194612/194612 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34376 event pairs, 69 based on Foata normal form. 34/5274 useless extension candidates. Maximal degree in co-relation 62296. Up to 2018 conditions per place. [2023-08-27 01:27:23,394 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 714 selfloop transitions, 601 changer transitions 6/1321 dead transitions. [2023-08-27 01:27:23,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1321 transitions, 34409 flow [2023-08-27 01:27:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:27:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:27:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2475 transitions. [2023-08-27 01:27:23,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163162321278385 [2023-08-27 01:27:23,397 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2475 transitions. [2023-08-27 01:27:23,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2475 transitions. [2023-08-27 01:27:23,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:23,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2475 transitions. [2023-08-27 01:27:23,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 60.36585365853659) internal successors, (2475), 41 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,405 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,405 INFO L175 Difference]: Start difference. First operand has 482 places, 1203 transitions, 30187 flow. Second operand 41 states and 2475 transitions. [2023-08-27 01:27:23,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1321 transitions, 34409 flow [2023-08-27 01:27:25,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 1321 transitions, 33322 flow, removed 465 selfloop flow, removed 22 redundant places. [2023-08-27 01:27:25,367 INFO L231 Difference]: Finished difference. Result has 506 places, 1236 transitions, 31457 flow [2023-08-27 01:27:25,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=28846, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=31457, PETRI_PLACES=506, PETRI_TRANSITIONS=1236} [2023-08-27 01:27:25,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-27 01:27:25,369 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1236 transitions, 31457 flow [2023-08-27 01:27:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.95652173913044) internal successors, (1333), 23 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:25,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:25,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:25,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:25,575 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:25,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1651388050, now seen corresponding path program 23 times [2023-08-27 01:27:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:25,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567814201] [2023-08-27 01:27:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:25,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567814201] [2023-08-27 01:27:25,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567814201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534703785] [2023-08-27 01:27:25,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:27:25,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:25,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:25,925 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:25,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 01:27:26,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:27:26,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:26,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:27:26,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:26,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:26,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534703785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:26,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:26,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-08-27 01:27:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090386663] [2023-08-27 01:27:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:26,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 01:27:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:26,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 01:27:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:27:26,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:27:26,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1236 transitions, 31457 flow. Second operand has 21 states, 21 states have (on average 55.76190476190476) internal successors, (1171), 21 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:26,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:27:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:32,322 INFO L124 PetriNetUnfolderBase]: 3305/5525 cut-off events. [2023-08-27 01:27:32,322 INFO L125 PetriNetUnfolderBase]: For 225463/225463 co-relation queries the response was YES. [2023-08-27 01:27:32,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69357 conditions, 5525 events. 3305/5525 cut-off events. For 225463/225463 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 36078 event pairs, 169 based on Foata normal form. 42/5567 useless extension candidates. Maximal degree in co-relation 68962. Up to 2306 conditions per place. [2023-08-27 01:27:32,411 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 607 selfloop transitions, 790 changer transitions 6/1403 dead transitions. [2023-08-27 01:27:32,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1403 transitions, 38604 flow [2023-08-27 01:27:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 01:27:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 01:27:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2034 transitions. [2023-08-27 01:27:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40078817733990146 [2023-08-27 01:27:32,413 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2034 transitions. [2023-08-27 01:27:32,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2034 transitions. [2023-08-27 01:27:32,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:32,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2034 transitions. [2023-08-27 01:27:32,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 58.114285714285714) internal successors, (2034), 35 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:32,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:32,417 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:32,417 INFO L175 Difference]: Start difference. First operand has 506 places, 1236 transitions, 31457 flow. Second operand 35 states and 2034 transitions. [2023-08-27 01:27:32,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1403 transitions, 38604 flow [2023-08-27 01:27:34,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1403 transitions, 37970 flow, removed 178 selfloop flow, removed 24 redundant places. [2023-08-27 01:27:34,529 INFO L231 Difference]: Finished difference. Result has 520 places, 1326 transitions, 36145 flow [2023-08-27 01:27:34,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=30479, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=36145, PETRI_PLACES=520, PETRI_TRANSITIONS=1326} [2023-08-27 01:27:34,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 500 predicate places. [2023-08-27 01:27:34,530 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1326 transitions, 36145 flow [2023-08-27 01:27:34,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.76190476190476) internal successors, (1171), 21 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:34,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:34,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-27 01:27:34,731 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,SelfDestructingSolverStorable25 [2023-08-27 01:27:34,731 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:34,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:34,731 INFO L85 PathProgramCache]: Analyzing trace with hash -220836474, now seen corresponding path program 24 times [2023-08-27 01:27:34,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:34,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684352118] [2023-08-27 01:27:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:34,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:34,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684352118] [2023-08-27 01:27:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684352118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:34,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408071964] [2023-08-27 01:27:34,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:27:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:34,985 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:34,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 01:27:35,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:27:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:35,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:27:35,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:35,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:35,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408071964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:35,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:35,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-27 01:27:35,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23356309] [2023-08-27 01:27:35,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:35,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:27:35,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:35,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:27:35,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:27:35,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:27:35,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1326 transitions, 36145 flow. Second operand has 19 states, 19 states have (on average 56.05263157894737) internal successors, (1065), 19 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:35,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:35,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:27:35,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:39,634 INFO L124 PetriNetUnfolderBase]: 3448/5815 cut-off events. [2023-08-27 01:27:39,634 INFO L125 PetriNetUnfolderBase]: For 259712/259712 co-relation queries the response was YES. [2023-08-27 01:27:39,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75479 conditions, 5815 events. 3448/5815 cut-off events. For 259712/259712 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 38322 event pairs, 108 based on Foata normal form. 17/5832 useless extension candidates. Maximal degree in co-relation 75057. Up to 4511 conditions per place. [2023-08-27 01:27:39,720 INFO L140 encePairwiseOnDemand]: 136/145 looper letters, 1101 selfloop transitions, 381 changer transitions 13/1495 dead transitions. [2023-08-27 01:27:39,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1495 transitions, 42376 flow [2023-08-27 01:27:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 01:27:39,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 01:27:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2644 transitions. [2023-08-27 01:27:39,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40521072796934865 [2023-08-27 01:27:39,723 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2644 transitions. [2023-08-27 01:27:39,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2644 transitions. [2023-08-27 01:27:39,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:39,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2644 transitions. [2023-08-27 01:27:39,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 58.75555555555555) internal successors, (2644), 45 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,731 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:39,731 INFO L175 Difference]: Start difference. First operand has 520 places, 1326 transitions, 36145 flow. Second operand 45 states and 2644 transitions. [2023-08-27 01:27:39,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1495 transitions, 42376 flow [2023-08-27 01:27:41,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 1495 transitions, 39980 flow, removed 739 selfloop flow, removed 17 redundant places. [2023-08-27 01:27:41,928 INFO L231 Difference]: Finished difference. Result has 556 places, 1371 transitions, 36401 flow [2023-08-27 01:27:41,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=33956, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=960, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=36401, PETRI_PLACES=556, PETRI_TRANSITIONS=1371} [2023-08-27 01:27:41,929 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 536 predicate places. [2023-08-27 01:27:41,929 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1371 transitions, 36401 flow [2023-08-27 01:27:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.05263157894737) internal successors, (1065), 19 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:41,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:41,929 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:41,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:42,130 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,SelfDestructingSolverStorable26 [2023-08-27 01:27:42,130 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:42,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:42,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1462511304, now seen corresponding path program 25 times [2023-08-27 01:27:42,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:42,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697062113] [2023-08-27 01:27:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:42,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:42,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697062113] [2023-08-27 01:27:42,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697062113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:42,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507383507] [2023-08-27 01:27:42,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:27:42,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:42,369 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:42,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 01:27:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:42,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:27:42,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:42,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:42,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507383507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:42,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:42,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-27 01:27:42,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298831883] [2023-08-27 01:27:42,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:42,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 01:27:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:42,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 01:27:42,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-08-27 01:27:42,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:27:42,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1371 transitions, 36401 flow. Second operand has 23 states, 23 states have (on average 57.95652173913044) internal successors, (1333), 23 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:42,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:42,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:27:42,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:49,952 INFO L124 PetriNetUnfolderBase]: 4244/7197 cut-off events. [2023-08-27 01:27:49,952 INFO L125 PetriNetUnfolderBase]: For 370053/370053 co-relation queries the response was YES. [2023-08-27 01:27:50,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93022 conditions, 7197 events. 4244/7197 cut-off events. For 370053/370053 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 49099 event pairs, 47 based on Foata normal form. 96/7293 useless extension candidates. Maximal degree in co-relation 92122. Up to 2000 conditions per place. [2023-08-27 01:27:50,062 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 595 selfloop transitions, 1229 changer transitions 37/1861 dead transitions. [2023-08-27 01:27:50,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1861 transitions, 52649 flow [2023-08-27 01:27:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-27 01:27:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-27 01:27:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3324 transitions. [2023-08-27 01:27:50,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4168025078369906 [2023-08-27 01:27:50,065 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3324 transitions. [2023-08-27 01:27:50,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3324 transitions. [2023-08-27 01:27:50,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:50,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3324 transitions. [2023-08-27 01:27:50,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 60.43636363636364) internal successors, (3324), 55 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:50,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:50,074 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:50,074 INFO L175 Difference]: Start difference. First operand has 556 places, 1371 transitions, 36401 flow. Second operand 55 states and 3324 transitions. [2023-08-27 01:27:50,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1861 transitions, 52649 flow [2023-08-27 01:27:52,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 1861 transitions, 51435 flow, removed 435 selfloop flow, removed 20 redundant places. [2023-08-27 01:27:53,020 INFO L231 Difference]: Finished difference. Result has 605 places, 1701 transitions, 49709 flow [2023-08-27 01:27:53,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=35170, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=911, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=49709, PETRI_PLACES=605, PETRI_TRANSITIONS=1701} [2023-08-27 01:27:53,022 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 585 predicate places. [2023-08-27 01:27:53,022 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1701 transitions, 49709 flow [2023-08-27 01:27:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 57.95652173913044) internal successors, (1333), 23 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:53,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:53,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:53,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:53,227 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,SelfDestructingSolverStorable27 [2023-08-27 01:27:53,227 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:27:53,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1400656794, now seen corresponding path program 26 times [2023-08-27 01:27:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481508579] [2023-08-27 01:27:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:53,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481508579] [2023-08-27 01:27:53,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481508579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:53,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154471512] [2023-08-27 01:27:53,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:53,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:53,459 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:53,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 01:27:53,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:53,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:53,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:27:53,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:53,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:53,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154471512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:53,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:53,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-27 01:27:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972150167] [2023-08-27 01:27:53,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 01:27:53,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 01:27:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:27:53,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:27:53,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1701 transitions, 49709 flow. Second operand has 21 states, 21 states have (on average 55.95238095238095) internal successors, (1175), 21 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:53,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:53,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:27:53,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:59,283 INFO L124 PetriNetUnfolderBase]: 4552/7746 cut-off events. [2023-08-27 01:27:59,283 INFO L125 PetriNetUnfolderBase]: For 456602/456602 co-relation queries the response was YES. [2023-08-27 01:27:59,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107211 conditions, 7746 events. 4552/7746 cut-off events. For 456602/456602 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 53719 event pairs, 477 based on Foata normal form. 87/7833 useless extension candidates. Maximal degree in co-relation 106251. Up to 6559 conditions per place. [2023-08-27 01:27:59,407 INFO L140 encePairwiseOnDemand]: 136/145 looper letters, 1630 selfloop transitions, 330 changer transitions 10/1970 dead transitions. [2023-08-27 01:27:59,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1970 transitions, 61735 flow [2023-08-27 01:27:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 01:27:59,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 01:27:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2363 transitions. [2023-08-27 01:27:59,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074137931034483 [2023-08-27 01:27:59,409 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2363 transitions. [2023-08-27 01:27:59,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2363 transitions. [2023-08-27 01:27:59,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:59,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2363 transitions. [2023-08-27 01:27:59,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 59.075) internal successors, (2363), 40 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:59,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:59,415 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:59,415 INFO L175 Difference]: Start difference. First operand has 605 places, 1701 transitions, 49709 flow. Second operand 40 states and 2363 transitions. [2023-08-27 01:27:59,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1970 transitions, 61735 flow [2023-08-27 01:28:04,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1970 transitions, 57424 flow, removed 2020 selfloop flow, removed 29 redundant places. [2023-08-27 01:28:04,211 INFO L231 Difference]: Finished difference. Result has 635 places, 1824 transitions, 51762 flow [2023-08-27 01:28:04,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=45888, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=51762, PETRI_PLACES=635, PETRI_TRANSITIONS=1824} [2023-08-27 01:28:04,214 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 615 predicate places. [2023-08-27 01:28:04,214 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 1824 transitions, 51762 flow [2023-08-27 01:28:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.95238095238095) internal successors, (1175), 21 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:04,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:04,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:04,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 01:28:04,421 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,SelfDestructingSolverStorable28 [2023-08-27 01:28:04,422 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:28:04,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2073126848, now seen corresponding path program 27 times [2023-08-27 01:28:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639063093] [2023-08-27 01:28:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:04,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639063093] [2023-08-27 01:28:04,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639063093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:04,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322888888] [2023-08-27 01:28:04,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:28:04,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:04,640 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:28:04,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 01:28:04,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:28:04,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:04,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:28:04,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:04,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:05,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322888888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:05,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:05,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 01:28:05,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878730765] [2023-08-27 01:28:05,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 01:28:05,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 01:28:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:28:05,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:28:05,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 1824 transitions, 51762 flow. Second operand has 22 states, 22 states have (on average 57.90909090909091) internal successors, (1274), 22 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:05,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:05,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:28:05,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:12,639 INFO L124 PetriNetUnfolderBase]: 4902/8406 cut-off events. [2023-08-27 01:28:12,640 INFO L125 PetriNetUnfolderBase]: For 493755/493755 co-relation queries the response was YES. [2023-08-27 01:28:12,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110991 conditions, 8406 events. 4902/8406 cut-off events. For 493755/493755 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 59787 event pairs, 472 based on Foata normal form. 96/8502 useless extension candidates. Maximal degree in co-relation 110228. Up to 6498 conditions per place. [2023-08-27 01:28:12,811 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 1580 selfloop transitions, 495 changer transitions 36/2111 dead transitions. [2023-08-27 01:28:12,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 2111 transitions, 64158 flow [2023-08-27 01:28:12,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 01:28:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 01:28:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2626 transitions. [2023-08-27 01:28:12,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211708099438653 [2023-08-27 01:28:12,815 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2626 transitions. [2023-08-27 01:28:12,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2626 transitions. [2023-08-27 01:28:12,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:12,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2626 transitions. [2023-08-27 01:28:12,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.06976744186046) internal successors, (2626), 43 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:12,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 145.0) internal successors, (6380), 44 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:12,823 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 145.0) internal successors, (6380), 44 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:12,823 INFO L175 Difference]: Start difference. First operand has 635 places, 1824 transitions, 51762 flow. Second operand 43 states and 2626 transitions. [2023-08-27 01:28:12,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 2111 transitions, 64158 flow [2023-08-27 01:28:18,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 2111 transitions, 61837 flow, removed 1105 selfloop flow, removed 15 redundant places. [2023-08-27 01:28:18,259 INFO L231 Difference]: Finished difference. Result has 679 places, 1940 transitions, 55725 flow [2023-08-27 01:28:18,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=49730, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=55725, PETRI_PLACES=679, PETRI_TRANSITIONS=1940} [2023-08-27 01:28:18,261 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 659 predicate places. [2023-08-27 01:28:18,261 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 1940 transitions, 55725 flow [2023-08-27 01:28:18,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.90909090909091) internal successors, (1274), 22 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:18,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:18,261 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:18,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 01:28:18,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:18,462 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:28:18,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1092195608, now seen corresponding path program 28 times [2023-08-27 01:28:18,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:18,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084390839] [2023-08-27 01:28:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:18,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084390839] [2023-08-27 01:28:18,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084390839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:18,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736255696] [2023-08-27 01:28:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:28:18,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:18,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:18,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:28:18,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 01:28:18,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:28:18,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:18,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:28:18,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:18,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736255696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:20,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:20,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2023-08-27 01:28:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011579902] [2023-08-27 01:28:20,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:20,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:28:20,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:28:20,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:28:20,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:28:20,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1940 transitions, 55725 flow. Second operand has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:20,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:20,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:28:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:22,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:28:33,300 INFO L124 PetriNetUnfolderBase]: 5030/8636 cut-off events. [2023-08-27 01:28:33,301 INFO L125 PetriNetUnfolderBase]: For 552449/552449 co-relation queries the response was YES. [2023-08-27 01:28:33,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114763 conditions, 8636 events. 5030/8636 cut-off events. For 552449/552449 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 61765 event pairs, 1204 based on Foata normal form. 76/8712 useless extension candidates. Maximal degree in co-relation 113967. Up to 7546 conditions per place. [2023-08-27 01:28:33,474 INFO L140 encePairwiseOnDemand]: 139/145 looper letters, 1689 selfloop transitions, 397 changer transitions 3/2089 dead transitions. [2023-08-27 01:28:33,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 2089 transitions, 64013 flow [2023-08-27 01:28:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:28:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:28:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1587 transitions. [2023-08-27 01:28:33,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053639846743295 [2023-08-27 01:28:33,476 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1587 transitions. [2023-08-27 01:28:33,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1587 transitions. [2023-08-27 01:28:33,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:33,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1587 transitions. [2023-08-27 01:28:33,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.77777777777778) internal successors, (1587), 27 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:33,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:33,480 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:33,480 INFO L175 Difference]: Start difference. First operand has 679 places, 1940 transitions, 55725 flow. Second operand 27 states and 1587 transitions. [2023-08-27 01:28:33,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 2089 transitions, 64013 flow [2023-08-27 01:28:39,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 2089 transitions, 61674 flow, removed 1108 selfloop flow, removed 15 redundant places. [2023-08-27 01:28:39,879 INFO L231 Difference]: Finished difference. Result has 698 places, 2013 transitions, 57719 flow [2023-08-27 01:28:39,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=53347, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=57719, PETRI_PLACES=698, PETRI_TRANSITIONS=2013} [2023-08-27 01:28:39,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 678 predicate places. [2023-08-27 01:28:39,880 INFO L495 AbstractCegarLoop]: Abstraction has has 698 places, 2013 transitions, 57719 flow [2023-08-27 01:28:39,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 55.73684210526316) internal successors, (1059), 19 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:39,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:39,881 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:39,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 01:28:40,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:40,086 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:28:40,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1940185062, now seen corresponding path program 29 times [2023-08-27 01:28:40,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:40,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105325484] [2023-08-27 01:28:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:40,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:40,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105325484] [2023-08-27 01:28:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105325484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548581387] [2023-08-27 01:28:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:28:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:40,289 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:28:40,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 01:28:40,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:28:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:40,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:28:40,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:40,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:40,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:40,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548581387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:40,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:40,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-27 01:28:40,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449195429] [2023-08-27 01:28:40,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:40,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:28:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:40,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:28:40,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:28:40,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:28:40,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 698 places, 2013 transitions, 57719 flow. Second operand has 20 states, 20 states have (on average 56.0) internal successors, (1120), 20 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:40,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:40,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:28:40,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:47,417 INFO L124 PetriNetUnfolderBase]: 5196/8920 cut-off events. [2023-08-27 01:28:47,417 INFO L125 PetriNetUnfolderBase]: For 546298/546298 co-relation queries the response was YES. [2023-08-27 01:28:47,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119576 conditions, 8920 events. 5196/8920 cut-off events. For 546298/546298 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 63996 event pairs, 845 based on Foata normal form. 50/8970 useless extension candidates. Maximal degree in co-relation 118908. Up to 8057 conditions per place. [2023-08-27 01:28:47,586 INFO L140 encePairwiseOnDemand]: 136/145 looper letters, 1940 selfloop transitions, 247 changer transitions 6/2193 dead transitions. [2023-08-27 01:28:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 737 places, 2193 transitions, 66887 flow [2023-08-27 01:28:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 01:28:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 01:28:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2355 transitions. [2023-08-27 01:28:47,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060344827586207 [2023-08-27 01:28:47,588 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2355 transitions. [2023-08-27 01:28:47,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2355 transitions. [2023-08-27 01:28:47,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:47,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2355 transitions. [2023-08-27 01:28:47,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 58.875) internal successors, (2355), 40 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) [2023-08-27 01:28:47,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:47,593 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:47,593 INFO L175 Difference]: Start difference. First operand has 698 places, 2013 transitions, 57719 flow. Second operand 40 states and 2355 transitions. [2023-08-27 01:28:47,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 737 places, 2193 transitions, 66887 flow [2023-08-27 01:28:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 2193 transitions, 65495 flow, removed 620 selfloop flow, removed 13 redundant places. [2023-08-27 01:28:53,750 INFO L231 Difference]: Finished difference. Result has 738 places, 2087 transitions, 60005 flow [2023-08-27 01:28:53,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=56130, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=60005, PETRI_PLACES=738, PETRI_TRANSITIONS=2087} [2023-08-27 01:28:53,751 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 718 predicate places. [2023-08-27 01:28:53,751 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2087 transitions, 60005 flow [2023-08-27 01:28:53,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.0) internal successors, (1120), 20 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:53,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:53,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:53,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 01:28:53,953 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,SelfDestructingSolverStorable31 [2023-08-27 01:28:53,953 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:28:53,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -436700630, now seen corresponding path program 30 times [2023-08-27 01:28:53,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:53,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4081187] [2023-08-27 01:28:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4081187] [2023-08-27 01:28:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4081187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596030041] [2023-08-27 01:28:54,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:28:54,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:54,381 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:28:54,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 01:28:54,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 01:28:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:54,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:28:54,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:54,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:28:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596030041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:54,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:54,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-08-27 01:28:54,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610485185] [2023-08-27 01:28:54,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:54,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:28:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:28:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-08-27 01:28:54,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:28:54,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2087 transitions, 60005 flow. Second operand has 24 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:54,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:54,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:28:54,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:05,596 INFO L124 PetriNetUnfolderBase]: 5586/9565 cut-off events. [2023-08-27 01:29:05,597 INFO L125 PetriNetUnfolderBase]: For 677654/677654 co-relation queries the response was YES. [2023-08-27 01:29:05,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131504 conditions, 9565 events. 5586/9565 cut-off events. For 677654/677654 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 69454 event pairs, 800 based on Foata normal form. 52/9617 useless extension candidates. Maximal degree in co-relation 130530. Up to 7908 conditions per place. [2023-08-27 01:29:05,792 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 1786 selfloop transitions, 558 changer transitions 9/2353 dead transitions. [2023-08-27 01:29:05,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 778 places, 2353 transitions, 73667 flow [2023-08-27 01:29:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:29:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:29:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2399 transitions. [2023-08-27 01:29:05,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035323801513877 [2023-08-27 01:29:05,795 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2399 transitions. [2023-08-27 01:29:05,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2399 transitions. [2023-08-27 01:29:05,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:05,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2399 transitions. [2023-08-27 01:29:05,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.51219512195122) internal successors, (2399), 41 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:05,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:05,917 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:05,917 INFO L175 Difference]: Start difference. First operand has 738 places, 2087 transitions, 60005 flow. Second operand 41 states and 2399 transitions. [2023-08-27 01:29:05,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 778 places, 2353 transitions, 73667 flow [2023-08-27 01:29:13,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 758 places, 2353 transitions, 71096 flow, removed 1123 selfloop flow, removed 20 redundant places. [2023-08-27 01:29:13,576 INFO L231 Difference]: Finished difference. Result has 776 places, 2257 transitions, 66432 flow [2023-08-27 01:29:13,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=57755, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=66432, PETRI_PLACES=776, PETRI_TRANSITIONS=2257} [2023-08-27 01:29:13,578 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 756 predicate places. [2023-08-27 01:29:13,578 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 2257 transitions, 66432 flow [2023-08-27 01:29:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:13,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:13,578 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:13,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 01:29:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:13,778 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:29:13,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1297258152, now seen corresponding path program 31 times [2023-08-27 01:29:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682910267] [2023-08-27 01:29:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:13,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682910267] [2023-08-27 01:29:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682910267] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:14,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665463449] [2023-08-27 01:29:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:29:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:14,021 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:29:14,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 01:29:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:14,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 01:29:14,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:14,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665463449] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:14,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:14,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-27 01:29:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031989339] [2023-08-27 01:29:14,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:14,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:29:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:14,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:29:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:29:14,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:29:14,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 2257 transitions, 66432 flow. Second operand has 20 states, 20 states have (on average 55.75) internal successors, (1115), 20 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:14,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:14,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:29:14,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:22,491 INFO L124 PetriNetUnfolderBase]: 5742/9791 cut-off events. [2023-08-27 01:29:22,491 INFO L125 PetriNetUnfolderBase]: For 721640/721640 co-relation queries the response was YES. [2023-08-27 01:29:22,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138742 conditions, 9791 events. 5742/9791 cut-off events. For 721640/721640 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 70838 event pairs, 873 based on Foata normal form. 60/9851 useless extension candidates. Maximal degree in co-relation 137751. Up to 8611 conditions per place. [2023-08-27 01:29:22,688 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 1850 selfloop transitions, 501 changer transitions 15/2366 dead transitions. [2023-08-27 01:29:22,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 2366 transitions, 75408 flow [2023-08-27 01:29:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:29:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:29:22,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1626 transitions. [2023-08-27 01:29:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004926108374384 [2023-08-27 01:29:22,690 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1626 transitions. [2023-08-27 01:29:22,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1626 transitions. [2023-08-27 01:29:22,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:22,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1626 transitions. [2023-08-27 01:29:22,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.07142857142857) internal successors, (1626), 28 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:22,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:22,693 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:22,694 INFO L175 Difference]: Start difference. First operand has 776 places, 2257 transitions, 66432 flow. Second operand 28 states and 1626 transitions. [2023-08-27 01:29:22,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 2366 transitions, 75408 flow [2023-08-27 01:29:32,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 2366 transitions, 70825 flow, removed 2185 selfloop flow, removed 22 redundant places. [2023-08-27 01:29:32,495 INFO L231 Difference]: Finished difference. Result has 788 places, 2311 transitions, 66707 flow [2023-08-27 01:29:32,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=62694, PETRI_DIFFERENCE_MINUEND_PLACES=754, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=66707, PETRI_PLACES=788, PETRI_TRANSITIONS=2311} [2023-08-27 01:29:32,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 768 predicate places. [2023-08-27 01:29:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 2311 transitions, 66707 flow [2023-08-27 01:29:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.75) internal successors, (1115), 20 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:32,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:32,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:32,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 01:29:32,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:32,698 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:29:32,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:32,699 INFO L85 PathProgramCache]: Analyzing trace with hash -411162264, now seen corresponding path program 32 times [2023-08-27 01:29:32,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:32,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869053248] [2023-08-27 01:29:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:32,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869053248] [2023-08-27 01:29:32,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869053248] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685310973] [2023-08-27 01:29:32,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:29:32,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:32,925 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:29:32,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 01:29:33,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:29:33,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:33,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:29:33,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:33,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:33,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685310973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:33,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:33,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 01:29:33,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274691750] [2023-08-27 01:29:33,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:33,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 01:29:33,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:33,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 01:29:33,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-08-27 01:29:33,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:29:33,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 2311 transitions, 66707 flow. Second operand has 22 states, 22 states have (on average 57.81818181818182) internal successors, (1272), 22 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:33,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:33,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:29:33,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:43,242 INFO L124 PetriNetUnfolderBase]: 6362/10937 cut-off events. [2023-08-27 01:29:43,242 INFO L125 PetriNetUnfolderBase]: For 747914/747914 co-relation queries the response was YES. [2023-08-27 01:29:43,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149022 conditions, 10937 events. 6362/10937 cut-off events. For 747914/747914 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 81670 event pairs, 715 based on Foata normal form. 42/10979 useless extension candidates. Maximal degree in co-relation 148439. Up to 7544 conditions per place. [2023-08-27 01:29:43,470 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 1802 selfloop transitions, 855 changer transitions 39/2696 dead transitions. [2023-08-27 01:29:43,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 2696 transitions, 82654 flow [2023-08-27 01:29:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 01:29:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 01:29:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2782 transitions. [2023-08-27 01:29:43,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170914542728636 [2023-08-27 01:29:43,473 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2782 transitions. [2023-08-27 01:29:43,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2782 transitions. [2023-08-27 01:29:43,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:43,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2782 transitions. [2023-08-27 01:29:43,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 60.47826086956522) internal successors, (2782), 46 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:43,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:43,478 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:43,478 INFO L175 Difference]: Start difference. First operand has 788 places, 2311 transitions, 66707 flow. Second operand 46 states and 2782 transitions. [2023-08-27 01:29:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 2696 transitions, 82654 flow [2023-08-27 01:29:53,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 2696 transitions, 80604 flow, removed 866 selfloop flow, removed 19 redundant places. [2023-08-27 01:29:54,007 INFO L231 Difference]: Finished difference. Result has 822 places, 2482 transitions, 72578 flow [2023-08-27 01:29:54,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=64893, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=72578, PETRI_PLACES=822, PETRI_TRANSITIONS=2482} [2023-08-27 01:29:54,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 802 predicate places. [2023-08-27 01:29:54,009 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 2482 transitions, 72578 flow [2023-08-27 01:29:54,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.81818181818182) internal successors, (1272), 22 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:54,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:54,009 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:54,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 01:29:54,214 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,SelfDestructingSolverStorable34 [2023-08-27 01:29:54,214 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:29:54,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1897699701, now seen corresponding path program 33 times [2023-08-27 01:29:54,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:54,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770809004] [2023-08-27 01:29:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:54,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:54,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770809004] [2023-08-27 01:29:54,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770809004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:54,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234828422] [2023-08-27 01:29:54,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:29:54,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:54,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:54,759 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:29:54,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 01:29:54,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:29:54,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:54,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:29:54,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:30:40,729 WARN L234 SmtUtils]: Spent 29.25s on a formula simplification. DAG size of input: 33 DAG size of output: 32 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:31:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:31:08,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:31:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:31:33,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234828422] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:31:33,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:31:33,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 22 [2023-08-27 01:31:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054995519] [2023-08-27 01:31:33,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:31:33,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:31:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:31:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:31:33,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=421, Unknown=5, NotChecked=0, Total=552 [2023-08-27 01:31:33,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:31:33,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 2482 transitions, 72578 flow. Second operand has 24 states, 24 states have (on average 56.291666666666664) internal successors, (1351), 24 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:33,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:31:33,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:31:33,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:31:35,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:38,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:40,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:43,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:46,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:31:48,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:54,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:31:56,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:32:42,027 WARN L234 SmtUtils]: Spent 32.46s on a formula simplification. DAG size of input: 55 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:32:44,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:33:30,030 WARN L234 SmtUtils]: Spent 31.75s on a formula simplification. DAG size of input: 34 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:33:32,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:02,229 WARN L234 SmtUtils]: Spent 27.58s on a formula simplification. DAG size of input: 54 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:34:04,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:06,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:09,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:12,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:16,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:20,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:25,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 01:34:28,461 INFO L124 PetriNetUnfolderBase]: 8211/14361 cut-off events. [2023-08-27 01:34:28,462 INFO L125 PetriNetUnfolderBase]: For 1133734/1133734 co-relation queries the response was YES. [2023-08-27 01:34:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204997 conditions, 14361 events. 8211/14361 cut-off events. For 1133734/1133734 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 114762 event pairs, 227 based on Foata normal form. 18/14379 useless extension candidates. Maximal degree in co-relation 203861. Up to 7028 conditions per place. [2023-08-27 01:34:28,823 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 2085 selfloop transitions, 1193 changer transitions 210/3488 dead transitions. [2023-08-27 01:34:28,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 3488 transitions, 110594 flow [2023-08-27 01:34:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:34:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:34:28,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1684 transitions. [2023-08-27 01:34:28,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147783251231527 [2023-08-27 01:34:28,826 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1684 transitions. [2023-08-27 01:34:28,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1684 transitions. [2023-08-27 01:34:28,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:34:28,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1684 transitions. [2023-08-27 01:34:28,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.142857142857146) internal successors, (1684), 28 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:28,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:28,830 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 145.0) internal successors, (4205), 29 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:28,831 INFO L175 Difference]: Start difference. First operand has 822 places, 2482 transitions, 72578 flow. Second operand 28 states and 1684 transitions. [2023-08-27 01:34:28,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 3488 transitions, 110594 flow [2023-08-27 01:34:46,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 828 places, 3488 transitions, 109242 flow, removed 574 selfloop flow, removed 21 redundant places. [2023-08-27 01:34:46,886 INFO L231 Difference]: Finished difference. Result has 843 places, 2878 transitions, 87665 flow [2023-08-27 01:34:46,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=71663, PETRI_DIFFERENCE_MINUEND_PLACES=801, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=87665, PETRI_PLACES=843, PETRI_TRANSITIONS=2878} [2023-08-27 01:34:46,888 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 823 predicate places. [2023-08-27 01:34:46,888 INFO L495 AbstractCegarLoop]: Abstraction has has 843 places, 2878 transitions, 87665 flow [2023-08-27 01:34:46,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.291666666666664) internal successors, (1351), 24 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:46,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:46,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:46,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 01:34:47,089 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,SelfDestructingSolverStorable35 [2023-08-27 01:34:47,089 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:34:47,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1858137249, now seen corresponding path program 34 times [2023-08-27 01:34:47,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:47,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909651162] [2023-08-27 01:34:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:47,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:47,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909651162] [2023-08-27 01:34:47,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909651162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:34:47,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450085416] [2023-08-27 01:34:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:34:47,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:34:47,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:34:47,341 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:34:47,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 01:34:47,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:34:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:34:47,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 01:34:47,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:34:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:47,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:34:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:48,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450085416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:34:48,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:34:48,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 01:34:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806752459] [2023-08-27 01:34:48,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:34:48,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:34:48,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:34:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-27 01:34:48,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 145 [2023-08-27 01:34:48,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 843 places, 2878 transitions, 87665 flow. Second operand has 19 states, 19 states have (on average 60.10526315789474) internal successors, (1142), 19 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:48,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:48,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 145 [2023-08-27 01:34:48,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:05,494 INFO L124 PetriNetUnfolderBase]: 7856/13724 cut-off events. [2023-08-27 01:35:05,494 INFO L125 PetriNetUnfolderBase]: For 1096351/1096352 co-relation queries the response was YES. [2023-08-27 01:35:05,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200811 conditions, 13724 events. 7856/13724 cut-off events. For 1096351/1096352 co-relation queries the response was YES. Maximal size of possible extension queue 1045. Compared 108732 event pairs, 213 based on Foata normal form. 61/13785 useless extension candidates. Maximal degree in co-relation 199626. Up to 9729 conditions per place. [2023-08-27 01:35:06,001 INFO L140 encePairwiseOnDemand]: 140/145 looper letters, 2279 selfloop transitions, 816 changer transitions 90/3189 dead transitions. [2023-08-27 01:35:06,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 3189 transitions, 104804 flow [2023-08-27 01:35:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 01:35:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 01:35:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1526 transitions. [2023-08-27 01:35:06,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385057471264368 [2023-08-27 01:35:06,004 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1526 transitions. [2023-08-27 01:35:06,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1526 transitions. [2023-08-27 01:35:06,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:06,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1526 transitions. [2023-08-27 01:35:06,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 63.583333333333336) internal successors, (1526), 24 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:06,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:06,008 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:06,008 INFO L175 Difference]: Start difference. First operand has 843 places, 2878 transitions, 87665 flow. Second operand 24 states and 1526 transitions. [2023-08-27 01:35:06,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 3189 transitions, 104804 flow [2023-08-27 01:35:23,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 3189 transitions, 103369 flow, removed 627 selfloop flow, removed 22 redundant places. [2023-08-27 01:35:23,190 INFO L231 Difference]: Finished difference. Result has 848 places, 2936 transitions, 92204 flow [2023-08-27 01:35:23,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=85965, PETRI_DIFFERENCE_MINUEND_PLACES=820, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=92204, PETRI_PLACES=848, PETRI_TRANSITIONS=2936} [2023-08-27 01:35:23,193 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 828 predicate places. [2023-08-27 01:35:23,193 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 2936 transitions, 92204 flow [2023-08-27 01:35:23,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.10526315789474) internal successors, (1142), 19 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:23,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:23,194 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:23,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 01:35:23,400 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,SelfDestructingSolverStorable36 [2023-08-27 01:35:23,400 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:35:23,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:35:23,401 INFO L85 PathProgramCache]: Analyzing trace with hash 919067917, now seen corresponding path program 35 times [2023-08-27 01:35:23,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:35:23,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233587582] [2023-08-27 01:35:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:35:23,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:35:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:35:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:35:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233587582] [2023-08-27 01:35:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233587582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:35:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348739918] [2023-08-27 01:35:24,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:35:24,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:24,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:35:24,157 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:35:24,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 01:35:24,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-27 01:35:24,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:35:24,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 01:35:24,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:35:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:24,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:35:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:35:26,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348739918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:35:26,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:35:26,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2023-08-27 01:35:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292057073] [2023-08-27 01:35:26,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:35:26,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:35:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:35:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:35:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-08-27 01:35:26,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:35:26,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 2936 transitions, 92204 flow. Second operand has 27 states, 27 states have (on average 55.7037037037037) internal successors, (1504), 27 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:26,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:35:26,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:35:26,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:46,867 INFO L124 PetriNetUnfolderBase]: 8356/14594 cut-off events. [2023-08-27 01:35:46,868 INFO L125 PetriNetUnfolderBase]: For 1284640/1284640 co-relation queries the response was YES. [2023-08-27 01:35:47,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216094 conditions, 14594 events. 8356/14594 cut-off events. For 1284640/1284640 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 116791 event pairs, 107 based on Foata normal form. 120/14714 useless extension candidates. Maximal degree in co-relation 214612. Up to 11466 conditions per place. [2023-08-27 01:35:47,261 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 2353 selfloop transitions, 896 changer transitions 16/3265 dead transitions. [2023-08-27 01:35:47,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 888 places, 3265 transitions, 110285 flow [2023-08-27 01:35:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:35:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:35:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2396 transitions. [2023-08-27 01:35:47,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40302775441547517 [2023-08-27 01:35:47,263 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2396 transitions. [2023-08-27 01:35:47,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2396 transitions. [2023-08-27 01:35:47,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:47,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2396 transitions. [2023-08-27 01:35:47,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.4390243902439) internal successors, (2396), 41 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:47,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:47,268 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:47,268 INFO L175 Difference]: Start difference. First operand has 848 places, 2936 transitions, 92204 flow. Second operand 41 states and 2396 transitions. [2023-08-27 01:35:47,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 888 places, 3265 transitions, 110285 flow [2023-08-27 01:36:07,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 871 places, 3265 transitions, 107185 flow, removed 1117 selfloop flow, removed 17 redundant places. [2023-08-27 01:36:07,732 INFO L231 Difference]: Finished difference. Result has 881 places, 3124 transitions, 100729 flow [2023-08-27 01:36:07,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=89576, PETRI_DIFFERENCE_MINUEND_PLACES=831, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=100729, PETRI_PLACES=881, PETRI_TRANSITIONS=3124} [2023-08-27 01:36:07,735 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 861 predicate places. [2023-08-27 01:36:07,735 INFO L495 AbstractCegarLoop]: Abstraction has has 881 places, 3124 transitions, 100729 flow [2023-08-27 01:36:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 55.7037037037037) internal successors, (1504), 27 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:07,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:36:07,735 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:36:07,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 01:36:07,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:07,936 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:36:07,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:36:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash -463289269, now seen corresponding path program 36 times [2023-08-27 01:36:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:36:07,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597755419] [2023-08-27 01:36:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:36:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:36:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:36:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:08,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:36:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597755419] [2023-08-27 01:36:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597755419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:36:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826829854] [2023-08-27 01:36:08,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:36:08,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:08,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:36:08,561 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:36:08,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 01:36:08,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 01:36:08,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:36:08,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 01:36:08,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:36:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:09,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:36:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:36:11,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826829854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:36:11,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:36:11,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 24 [2023-08-27 01:36:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876185741] [2023-08-27 01:36:11,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:36:11,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:36:11,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:36:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:36:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-08-27 01:36:11,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:36:11,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 881 places, 3124 transitions, 100729 flow. Second operand has 25 states, 25 states have (on average 55.6) internal successors, (1390), 25 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:11,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:36:11,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:36:11,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:36:18,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:36:28,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:36:33,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:36:43,003 WARN L234 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 116 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:36:59,790 INFO L124 PetriNetUnfolderBase]: 8630/14968 cut-off events. [2023-08-27 01:36:59,791 INFO L125 PetriNetUnfolderBase]: For 1171207/1171207 co-relation queries the response was YES. [2023-08-27 01:37:00,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224642 conditions, 14968 events. 8630/14968 cut-off events. For 1171207/1171207 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 119049 event pairs, 417 based on Foata normal form. 36/15004 useless extension candidates. Maximal degree in co-relation 223232. Up to 7258 conditions per place. [2023-08-27 01:37:00,210 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 2140 selfloop transitions, 1209 changer transitions 14/3363 dead transitions. [2023-08-27 01:37:00,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 920 places, 3363 transitions, 115703 flow [2023-08-27 01:37:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 01:37:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 01:37:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2321 transitions. [2023-08-27 01:37:00,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001724137931034 [2023-08-27 01:37:00,213 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2321 transitions. [2023-08-27 01:37:00,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2321 transitions. [2023-08-27 01:37:00,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:37:00,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2321 transitions. [2023-08-27 01:37:00,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 58.025) internal successors, (2321), 40 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:00,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:00,219 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 145.0) internal successors, (5945), 41 states have internal predecessors, (5945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:00,219 INFO L175 Difference]: Start difference. First operand has 881 places, 3124 transitions, 100729 flow. Second operand 40 states and 2321 transitions. [2023-08-27 01:37:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 920 places, 3363 transitions, 115703 flow [2023-08-27 01:37:20,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 900 places, 3363 transitions, 111571 flow, removed 1992 selfloop flow, removed 20 redundant places. [2023-08-27 01:37:21,011 INFO L231 Difference]: Finished difference. Result has 909 places, 3231 transitions, 104518 flow [2023-08-27 01:37:21,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=96876, PETRI_DIFFERENCE_MINUEND_PLACES=861, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=104518, PETRI_PLACES=909, PETRI_TRANSITIONS=3231} [2023-08-27 01:37:21,013 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 889 predicate places. [2023-08-27 01:37:21,014 INFO L495 AbstractCegarLoop]: Abstraction has has 909 places, 3231 transitions, 104518 flow [2023-08-27 01:37:21,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.6) internal successors, (1390), 25 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:21,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:37:21,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:37:21,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 01:37:21,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 01:37:21,217 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:37:21,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:37:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2097719245, now seen corresponding path program 37 times [2023-08-27 01:37:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:37:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288860428] [2023-08-27 01:37:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:37:21,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:37:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:37:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:37:21,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:37:21,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288860428] [2023-08-27 01:37:21,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288860428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:37:21,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122428044] [2023-08-27 01:37:21,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:37:21,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:37:21,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:37:21,708 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:37:21,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 01:37:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:37:21,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 01:37:21,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:37:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:37:22,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:37:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:37:23,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122428044] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:37:23,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:37:23,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2023-08-27 01:37:23,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586820454] [2023-08-27 01:37:23,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:37:23,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:37:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:37:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:37:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2023-08-27 01:37:23,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:37:23,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 909 places, 3231 transitions, 104518 flow. Second operand has 25 states, 25 states have (on average 55.8) internal successors, (1395), 25 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:23,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:37:23,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:37:23,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:37:47,955 INFO L124 PetriNetUnfolderBase]: 8962/15592 cut-off events. [2023-08-27 01:37:47,955 INFO L125 PetriNetUnfolderBase]: For 1270527/1270527 co-relation queries the response was YES. [2023-08-27 01:37:48,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235479 conditions, 15592 events. 8962/15592 cut-off events. For 1270527/1270527 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 125187 event pairs, 452 based on Foata normal form. 72/15664 useless extension candidates. Maximal degree in co-relation 233668. Up to 7117 conditions per place. [2023-08-27 01:37:48,330 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 2207 selfloop transitions, 1268 changer transitions 5/3480 dead transitions. [2023-08-27 01:37:48,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 948 places, 3480 transitions, 120771 flow [2023-08-27 01:37:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 01:37:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 01:37:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2439 transitions. [2023-08-27 01:37:48,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4004926108374384 [2023-08-27 01:37:48,333 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2439 transitions. [2023-08-27 01:37:48,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2439 transitions. [2023-08-27 01:37:48,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:37:48,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2439 transitions. [2023-08-27 01:37:48,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.07142857142857) internal successors, (2439), 42 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:48,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:48,337 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:48,337 INFO L175 Difference]: Start difference. First operand has 909 places, 3231 transitions, 104518 flow. Second operand 42 states and 2439 transitions. [2023-08-27 01:37:48,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 948 places, 3480 transitions, 120771 flow [2023-08-27 01:38:07,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 3480 transitions, 118921 flow, removed 466 selfloop flow, removed 22 redundant places. [2023-08-27 01:38:07,677 INFO L231 Difference]: Finished difference. Result has 936 places, 3386 transitions, 114269 flow [2023-08-27 01:38:07,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=102227, PETRI_DIFFERENCE_MINUEND_PLACES=885, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=114269, PETRI_PLACES=936, PETRI_TRANSITIONS=3386} [2023-08-27 01:38:07,679 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 916 predicate places. [2023-08-27 01:38:07,680 INFO L495 AbstractCegarLoop]: Abstraction has has 936 places, 3386 transitions, 114269 flow [2023-08-27 01:38:07,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.8) internal successors, (1395), 25 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:07,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:38:07,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:38:07,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 01:38:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 01:38:07,881 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:38:07,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:38:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash -842436061, now seen corresponding path program 38 times [2023-08-27 01:38:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:38:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514454023] [2023-08-27 01:38:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:38:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:38:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:38:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:08,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:38:08,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514454023] [2023-08-27 01:38:08,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514454023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:38:08,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746194744] [2023-08-27 01:38:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:38:08,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:38:08,309 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:38:08,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 01:38:08,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:38:08,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:38:08,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 01:38:08,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:38:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:08,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:38:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:09,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746194744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:38:09,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:38:09,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2023-08-27 01:38:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78736516] [2023-08-27 01:38:09,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:38:09,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:38:09,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:38:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:38:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2023-08-27 01:38:09,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 145 [2023-08-27 01:38:09,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 936 places, 3386 transitions, 114269 flow. Second operand has 24 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:09,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:38:09,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 145 [2023-08-27 01:38:09,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:38:15,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-27 01:38:35,628 INFO L124 PetriNetUnfolderBase]: 9425/16421 cut-off events. [2023-08-27 01:38:35,629 INFO L125 PetriNetUnfolderBase]: For 1418289/1418289 co-relation queries the response was YES. [2023-08-27 01:38:35,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253562 conditions, 16421 events. 9425/16421 cut-off events. For 1418289/1418289 co-relation queries the response was YES. Maximal size of possible extension queue 1246. Compared 132980 event pairs, 706 based on Foata normal form. 80/16501 useless extension candidates. Maximal degree in co-relation 251794. Up to 13731 conditions per place. [2023-08-27 01:38:36,065 INFO L140 encePairwiseOnDemand]: 137/145 looper letters, 2755 selfloop transitions, 906 changer transitions 18/3679 dead transitions. [2023-08-27 01:38:36,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 974 places, 3679 transitions, 132064 flow [2023-08-27 01:38:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:38:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:38:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2392 transitions. [2023-08-27 01:38:36,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40235492010092516 [2023-08-27 01:38:36,067 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2392 transitions. [2023-08-27 01:38:36,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2392 transitions. [2023-08-27 01:38:36,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:38:36,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2392 transitions. [2023-08-27 01:38:36,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.34146341463415) internal successors, (2392), 41 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:36,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:36,071 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:36,072 INFO L175 Difference]: Start difference. First operand has 936 places, 3386 transitions, 114269 flow. Second operand 41 states and 2392 transitions. [2023-08-27 01:38:36,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 974 places, 3679 transitions, 132064 flow [2023-08-27 01:38:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 3679 transitions, 128857 flow, removed 1520 selfloop flow, removed 24 redundant places. [2023-08-27 01:38:58,866 INFO L231 Difference]: Finished difference. Result has 963 places, 3566 transitions, 122751 flow [2023-08-27 01:38:58,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=110553, PETRI_DIFFERENCE_MINUEND_PLACES=910, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=122751, PETRI_PLACES=963, PETRI_TRANSITIONS=3566} [2023-08-27 01:38:58,869 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 943 predicate places. [2023-08-27 01:38:58,869 INFO L495 AbstractCegarLoop]: Abstraction has has 963 places, 3566 transitions, 122751 flow [2023-08-27 01:38:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.75) internal successors, (1338), 24 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:58,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:38:58,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:38:58,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 01:38:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:59,075 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 01:38:59,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:38:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -315083587, now seen corresponding path program 39 times [2023-08-27 01:38:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:38:59,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832348160] [2023-08-27 01:38:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:38:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:38:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:38:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:59,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:38:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832348160] [2023-08-27 01:38:59,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832348160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:38:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511949458] [2023-08-27 01:38:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:38:59,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:59,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:38:59,572 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:38:59,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 01:38:59,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 01:38:59,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:38:59,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:38:59,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:38:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:38:59,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:39:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:39:00,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511949458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:39:00,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:39:00,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-27 01:39:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445752945] [2023-08-27 01:39:00,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:39:00,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:39:00,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:39:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:39:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2023-08-27 01:39:00,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2023-08-27 01:39:00,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 3566 transitions, 122751 flow. Second operand has 26 states, 26 states have (on average 57.76923076923077) internal successors, (1502), 26 states have internal predecessors, (1502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:00,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:39:00,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2023-08-27 01:39:00,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:39:29,753 INFO L124 PetriNetUnfolderBase]: 9465/16481 cut-off events. [2023-08-27 01:39:29,753 INFO L125 PetriNetUnfolderBase]: For 1417816/1417816 co-relation queries the response was YES. [2023-08-27 01:39:30,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254948 conditions, 16481 events. 9465/16481 cut-off events. For 1417816/1417816 co-relation queries the response was YES. Maximal size of possible extension queue 1237. Compared 133471 event pairs, 502 based on Foata normal form. 98/16579 useless extension candidates. Maximal degree in co-relation 253626. Up to 11580 conditions per place. [2023-08-27 01:39:30,418 INFO L140 encePairwiseOnDemand]: 138/145 looper letters, 2287 selfloop transitions, 1407 changer transitions 5/3699 dead transitions. [2023-08-27 01:39:30,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 998 places, 3699 transitions, 132982 flow [2023-08-27 01:39:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 01:39:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 01:39:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2227 transitions. [2023-08-27 01:39:30,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41509785647716685 [2023-08-27 01:39:30,420 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2227 transitions. [2023-08-27 01:39:30,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2227 transitions. [2023-08-27 01:39:30,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:39:30,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2227 transitions. [2023-08-27 01:39:30,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 60.189189189189186) internal successors, (2227), 37 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:30,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:30,424 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:39:30,424 INFO L175 Difference]: Start difference. First operand has 963 places, 3566 transitions, 122751 flow. Second operand 37 states and 2227 transitions. [2023-08-27 01:39:30,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 998 places, 3699 transitions, 132982 flow Received shutdown request... [2023-08-27 01:39:44,647 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2023-08-27 01:39:44,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 01:39:44,670 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:39:44,670 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 [2023-08-27 01:39:44,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-27 01:39:44,848 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 01:39:44,849 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-27 01:39:44,849 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-27 01:39:44,850 INFO L445 BasicCegarLoop]: Path program histogram: [39, 2, 1] [2023-08-27 01:39:44,851 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 01:39:44,851 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 01:39:44,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:39:44 BasicIcfg [2023-08-27 01:39:44,853 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 01:39:44,854 INFO L158 Benchmark]: Toolchain (without parser) took 818351.33ms. Allocated memory was 377.5MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 352.2MB in the beginning and 5.7GB in the end (delta: -5.3GB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. [2023-08-27 01:39:44,854 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 377.5MB. Free memory was 353.5MB in the beginning and 353.5MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 01:39:44,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.41ms. Allocated memory is still 377.5MB. Free memory was 351.8MB in the beginning and 341.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 01:39:44,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.23ms. Allocated memory is still 377.5MB. Free memory was 341.3MB in the beginning and 339.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:39:44,854 INFO L158 Benchmark]: Boogie Preprocessor took 35.74ms. Allocated memory is still 377.5MB. Free memory was 339.6MB in the beginning and 338.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:39:44,854 INFO L158 Benchmark]: RCFGBuilder took 424.28ms. Allocated memory is still 377.5MB. Free memory was 338.2MB in the beginning and 324.5MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 01:39:44,855 INFO L158 Benchmark]: TraceAbstraction took 817604.45ms. Allocated memory was 377.5MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 323.6MB in the beginning and 5.7GB in the end (delta: -5.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. [2023-08-27 01:39:44,856 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 377.5MB. Free memory was 353.5MB in the beginning and 353.5MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 243.41ms. Allocated memory is still 377.5MB. Free memory was 351.8MB in the beginning and 341.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.23ms. Allocated memory is still 377.5MB. Free memory was 341.3MB in the beginning and 339.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.74ms. Allocated memory is still 377.5MB. Free memory was 339.6MB in the beginning and 338.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 424.28ms. Allocated memory is still 377.5MB. Free memory was 338.2MB in the beginning and 324.5MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 817604.45ms. Allocated memory was 377.5MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 323.6MB in the beginning and 5.7GB in the end (delta: -5.4GB). Peak memory consumption was 4.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 71 PlacesBefore, 20 PlacesAfterwards, 70 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 468 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 463, independent: 461, independent conditional: 0, independent unconditional: 461, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 238, independent: 236, independent conditional: 0, independent unconditional: 236, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 463, independent: 225, independent conditional: 0, independent unconditional: 225, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 238, unknown conditional: 0, unknown unconditional: 238] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 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: 817.5s, OverallIterations: 42, TraceHistogramMax: 3, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 661.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 17 mSolverCounterUnknown, 3674 SdHoareTripleChecker+Valid, 78.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3674 mSDsluCounter, 656 SdHoareTripleChecker+Invalid, 75.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 480 mSDsCounter, 1312 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 22463 IncrementalHoareTripleChecker+Invalid, 23792 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1312 mSolverCounterUnsat, 176 mSDtfsCounter, 22463 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2582 GetRequests, 1069 SyntacticMatches, 42 SemanticMatches, 1471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16695 ImplicationChecksByTransitivity, 295.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122751occurred in iteration=41, InterpolantAutomatonStates: 1198, 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, 1.7s SatisfiabilityAnalysisTime, 140.6s InterpolantComputationTime, 1419 NumberOfCodeBlocks, 1397 NumberOfCodeBlocksAsserted, 138 NumberOfCheckSat, 1980 ConstructedInterpolants, 6 QuantifiedInterpolants, 22968 SizeOfPredicates, 322 NumberOfNonLiveVariables, 4816 ConjunctsInSsa, 625 ConjunctsInUnsatCore, 121 InterpolantComputations, 4 PerfectInterpolantSequences, 144/912 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