/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:25:02,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:25:02,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 02:25:02,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:25:02,151 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:25:02,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:25:02,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:25:02,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:25:02,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:25:02,186 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:25:02,186 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:25:02,187 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:25:02,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:25:02,188 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:25:02,188 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:25:02,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:25:02,189 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:25:02,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:25:02,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:25:02,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:25:02,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:25:02,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:25:02,190 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:25:02,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:25:02,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:25:02,191 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:25:02,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:25:02,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:25:02,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:25:02,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:25:02,193 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:25:02,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:25:02,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:25:02,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:25:02,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:25:02,194 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:25:02,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:25:02,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:25:02,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:25:02,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:25:02,510 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:25:02,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-24 02:25:03,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:25:04,002 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:25:04,003 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-08-24 02:25:04,012 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e52cc736/8d8114acf5464f4cbf8a5a16d70b84a9/FLAG6a32ea4f0 [2023-08-24 02:25:04,027 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e52cc736/8d8114acf5464f4cbf8a5a16d70b84a9 [2023-08-24 02:25:04,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:25:04,033 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:25:04,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:25:04,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:25:04,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:25:04,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44c130f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04, skipping insertion in model container [2023-08-24 02:25:04,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,056 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:25:04,214 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-24 02:25:04,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:25:04,222 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:25:04,240 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[1991,2004] [2023-08-24 02:25:04,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:25:04,255 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:25:04,255 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:25:04,261 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:25:04,261 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04 WrapperNode [2023-08-24 02:25:04,261 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:25:04,262 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:25:04,262 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:25:04,262 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:25:04,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,291 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-08-24 02:25:04,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:25:04,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:25:04,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:25:04,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:25:04,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:25:04,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:25:04,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:25:04,317 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:25:04,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (1/1) ... [2023-08-24 02:25:04,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:25:04,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:04,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 02:25:04,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 02:25:04,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:25:04,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:25:04,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:25:04,389 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:25:04,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:25:04,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:25:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:25:04,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:25:04,391 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 02:25:04,461 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:25:04,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:25:04,610 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:25:04,639 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:25:04,640 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 02:25:04,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:25:04 BoogieIcfgContainer [2023-08-24 02:25:04,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:25:04,643 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:25:04,643 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:25:04,646 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:25:04,646 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:25:04" (1/3) ... [2023-08-24 02:25:04,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e70a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:25:04, skipping insertion in model container [2023-08-24 02:25:04,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:25:04" (2/3) ... [2023-08-24 02:25:04,647 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e70a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:25:04, skipping insertion in model container [2023-08-24 02:25:04,647 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:25:04" (3/3) ... [2023-08-24 02:25:04,648 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-08-24 02:25:04,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:25:04,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:25:04,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:25:04,722 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 02:25:04,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 75 transitions, 166 flow [2023-08-24 02:25:04,786 INFO L124 PetriNetUnfolderBase]: 5/73 cut-off events. [2023-08-24 02:25:04,787 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:25:04,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 5/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-08-24 02:25:04,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 75 transitions, 166 flow [2023-08-24 02:25:04,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 65 transitions, 142 flow [2023-08-24 02:25:04,798 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:25:04,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 65 transitions, 142 flow [2023-08-24 02:25:04,807 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 65 transitions, 142 flow [2023-08-24 02:25:04,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 142 flow [2023-08-24 02:25:04,831 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-08-24 02:25:04,831 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:25:04,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 65 events. 5/65 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-08-24 02:25:04,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 02:25:06,537 INFO L134 LiptonReduction]: Checked pairs total: 591 [2023-08-24 02:25:06,537 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-24 02:25:06,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:25:06,554 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;@2f7e1a53, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:25:06,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 02:25:06,560 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:25:06,560 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 02:25:06,560 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 02:25:06,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:06,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:06,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:06,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:06,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1462205477, now seen corresponding path program 1 times [2023-08-24 02:25:06,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766890723] [2023-08-24 02:25:06,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:06,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:06,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:06,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766890723] [2023-08-24 02:25:06,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766890723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:25:06,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:25:06,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 02:25:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377201953] [2023-08-24 02:25:06,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:25:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:25:06,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:25:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:25:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 02:25:06,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:06,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:06,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 02:25:06,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:06,994 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-08-24 02:25:06,994 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-24 02:25:06,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-08-24 02:25:06,998 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-24 02:25:06,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-08-24 02:25:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:25:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:25:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2023-08-24 02:25:07,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2023-08-24 02:25:07,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2023-08-24 02:25:07,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2023-08-24 02:25:07,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:07,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2023-08-24 02:25:07,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,030 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 213 transitions. [2023-08-24 02:25:07,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-08-24 02:25:07,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 02:25:07,034 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-08-24 02:25:07,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-24 02:25:07,040 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 02:25:07,040 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-08-24 02:25:07,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:07,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:07,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:25:07,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:07,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1937715720, now seen corresponding path program 1 times [2023-08-24 02:25:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:07,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180021345] [2023-08-24 02:25:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180021345] [2023-08-24 02:25:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180021345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:25:07,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:25:07,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:25:07,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348926813] [2023-08-24 02:25:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:25:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:25:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:25:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:25:07,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:07,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:07,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:07,257 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-08-24 02:25:07,258 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 02:25:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 149 events. 77/149 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 439 event pairs, 24 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 172. Up to 78 conditions per place. [2023-08-24 02:25:07,259 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 30 selfloop transitions, 3 changer transitions 3/36 dead transitions. [2023-08-24 02:25:07,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 36 transitions, 177 flow [2023-08-24 02:25:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:25:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:25:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 289 transitions. [2023-08-24 02:25:07,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44461538461538463 [2023-08-24 02:25:07,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 289 transitions. [2023-08-24 02:25:07,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 289 transitions. [2023-08-24 02:25:07,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:07,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 289 transitions. [2023-08-24 02:25:07,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,271 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,272 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 289 transitions. [2023-08-24 02:25:07,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 36 transitions, 177 flow [2023-08-24 02:25:07,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 36 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 02:25:07,273 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 72 flow [2023-08-24 02:25:07,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=46, 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=5, PETRI_FLOW=72, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-08-24 02:25:07,275 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 02:25:07,275 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 72 flow [2023-08-24 02:25:07,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:07,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:25:07,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:07,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:07,285 INFO L85 PathProgramCache]: Analyzing trace with hash 207767600, now seen corresponding path program 2 times [2023-08-24 02:25:07,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:07,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891288784] [2023-08-24 02:25:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891288784] [2023-08-24 02:25:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891288784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:07,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517270022] [2023-08-24 02:25:07,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:07,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:07,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:07,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 02:25:07,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:07,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 02:25:07,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:07,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517270022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:07,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:07,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 02:25:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612782368] [2023-08-24 02:25:07,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:07,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 02:25:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 02:25:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 02:25:07,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:07,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:07,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:07,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:07,752 INFO L124 PetriNetUnfolderBase]: 82/158 cut-off events. [2023-08-24 02:25:07,753 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-24 02:25:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 158 events. 82/158 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 499 event pairs, 13 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 148. Up to 53 conditions per place. [2023-08-24 02:25:07,754 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 35 selfloop transitions, 8 changer transitions 5/48 dead transitions. [2023-08-24 02:25:07,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 48 transitions, 282 flow [2023-08-24 02:25:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:25:07,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:25:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 403 transitions. [2023-08-24 02:25:07,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2023-08-24 02:25:07,757 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 403 transitions. [2023-08-24 02:25:07,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 403 transitions. [2023-08-24 02:25:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 403 transitions. [2023-08-24 02:25:07,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.57142857142857) internal successors, (403), 7 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,761 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,761 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 72 flow. Second operand 7 states and 403 transitions. [2023-08-24 02:25:07,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 48 transitions, 282 flow [2023-08-24 02:25:07,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 258 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 02:25:07,764 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 123 flow [2023-08-24 02:25:07,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-24 02:25:07,764 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-08-24 02:25:07,765 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 123 flow [2023-08-24 02:25:07,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 53.625) internal successors, (429), 8 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:07,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:07,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:07,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:07,966 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 [2023-08-24 02:25:07,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:07,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1133264402, now seen corresponding path program 3 times [2023-08-24 02:25:07,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:07,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571315469] [2023-08-24 02:25:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:07,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571315469] [2023-08-24 02:25:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571315469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:25:08,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:25:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:25:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826671707] [2023-08-24 02:25:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:25:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:25:08,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:25:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:25:08,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:08,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:08,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:08,092 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-08-24 02:25:08,092 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2023-08-24 02:25:08,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 136 events. 71/136 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 361 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 297. Up to 99 conditions per place. [2023-08-24 02:25:08,094 INFO L140 encePairwiseOnDemand]: 125/130 looper letters, 23 selfloop transitions, 9 changer transitions 2/34 dead transitions. [2023-08-24 02:25:08,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 242 flow [2023-08-24 02:25:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:25:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:25:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 283 transitions. [2023-08-24 02:25:08,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43538461538461537 [2023-08-24 02:25:08,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 283 transitions. [2023-08-24 02:25:08,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 283 transitions. [2023-08-24 02:25:08,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:08,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 283 transitions. [2023-08-24 02:25:08,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.6) internal successors, (283), 5 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,099 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,099 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 123 flow. Second operand 5 states and 283 transitions. [2023-08-24 02:25:08,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 242 flow [2023-08-24 02:25:08,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 226 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 02:25:08,103 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 158 flow [2023-08-24 02:25:08,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-08-24 02:25:08,103 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-24 02:25:08,104 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 158 flow [2023-08-24 02:25:08,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:08,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:08,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 02:25:08,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:08,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1019723230, now seen corresponding path program 4 times [2023-08-24 02:25:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:08,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13431840] [2023-08-24 02:25:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:08,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:08,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13431840] [2023-08-24 02:25:08,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13431840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:25:08,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:25:08,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:25:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680813017] [2023-08-24 02:25:08,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:25:08,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:25:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:08,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:25:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:25:08,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 25 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:08,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:08,218 INFO L124 PetriNetUnfolderBase]: 68/131 cut-off events. [2023-08-24 02:25:08,218 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-24 02:25:08,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 131 events. 68/131 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 342 event pairs, 28 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 313. Up to 116 conditions per place. [2023-08-24 02:25:08,220 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 25 selfloop transitions, 6 changer transitions 2/33 dead transitions. [2023-08-24 02:25:08,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 267 flow [2023-08-24 02:25:08,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:25:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:25:08,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 280 transitions. [2023-08-24 02:25:08,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 02:25:08,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 280 transitions. [2023-08-24 02:25:08,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 280 transitions. [2023-08-24 02:25:08,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:08,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 280 transitions. [2023-08-24 02:25:08,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 56.0) internal successors, (280), 5 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,224 INFO L175 Difference]: Start difference. First operand has 37 places, 25 transitions, 158 flow. Second operand 5 states and 280 transitions. [2023-08-24 02:25:08,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 267 flow [2023-08-24 02:25:08,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 243 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 02:25:08,227 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 178 flow [2023-08-24 02:25:08,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-24 02:25:08,228 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-08-24 02:25:08,228 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 178 flow [2023-08-24 02:25:08,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 5 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:08,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 02:25:08,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:08,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:08,229 INFO L85 PathProgramCache]: Analyzing trace with hash -898431814, now seen corresponding path program 5 times [2023-08-24 02:25:08,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:08,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324550292] [2023-08-24 02:25:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324550292] [2023-08-24 02:25:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324550292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136454171] [2023-08-24 02:25:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:08,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:08,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:08,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 02:25:08,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:08,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:08,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 02:25:08,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136454171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:08,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:08,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 02:25:08,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437900084] [2023-08-24 02:25:08,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:08,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 02:25:08,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:08,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 02:25:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 02:25:08,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:08,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:08,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:08,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:08,572 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-08-24 02:25:08,572 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-08-24 02:25:08,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 156 events. 83/156 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 443 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 441. Up to 82 conditions per place. [2023-08-24 02:25:08,574 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-24 02:25:08,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 416 flow [2023-08-24 02:25:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:25:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:25:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 560 transitions. [2023-08-24 02:25:08,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 02:25:08,576 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 560 transitions. [2023-08-24 02:25:08,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 560 transitions. [2023-08-24 02:25:08,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:08,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 560 transitions. [2023-08-24 02:25:08,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.0) internal successors, (560), 10 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,579 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,579 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 178 flow. Second operand 10 states and 560 transitions. [2023-08-24 02:25:08,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 416 flow [2023-08-24 02:25:08,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 400 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 02:25:08,582 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 269 flow [2023-08-24 02:25:08,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-24 02:25:08,583 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-24 02:25:08,583 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 269 flow [2023-08-24 02:25:08,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.5) internal successors, (535), 10 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:08,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:08,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 02:25:08,789 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,SelfDestructingSolverStorable5 [2023-08-24 02:25:08,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:08,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1965622594, now seen corresponding path program 6 times [2023-08-24 02:25:08,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:08,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295218554] [2023-08-24 02:25:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295218554] [2023-08-24 02:25:08,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295218554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:08,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081823052] [2023-08-24 02:25:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:25:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:08,856 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:08,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 02:25:08,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:25:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:08,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 02:25:08,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:08,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081823052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:08,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:08,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 02:25:08,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337130767] [2023-08-24 02:25:08,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:08,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 02:25:08,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 02:25:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 02:25:08,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:08,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 269 flow. Second operand has 10 states, 10 states have (on average 53.4) internal successors, (534), 10 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:08,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:08,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:08,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:09,056 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-08-24 02:25:09,056 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-08-24 02:25:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 140 events. 75/140 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 372 event pairs, 18 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 559. Up to 90 conditions per place. [2023-08-24 02:25:09,058 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 30 selfloop transitions, 15 changer transitions 1/46 dead transitions. [2023-08-24 02:25:09,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 412 flow [2023-08-24 02:25:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:25:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:25:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 341 transitions. [2023-08-24 02:25:09,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371794871794872 [2023-08-24 02:25:09,060 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 341 transitions. [2023-08-24 02:25:09,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 341 transitions. [2023-08-24 02:25:09,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:09,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 341 transitions. [2023-08-24 02:25:09,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,063 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,063 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 269 flow. Second operand 6 states and 341 transitions. [2023-08-24 02:25:09,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 412 flow [2023-08-24 02:25:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 368 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-24 02:25:09,067 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 264 flow [2023-08-24 02:25:09,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-24 02:25:09,068 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-24 02:25:09,068 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 264 flow [2023-08-24 02:25:09,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.4) internal successors, (534), 10 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:09,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:09,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 02:25:09,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:09,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:09,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2145235587, now seen corresponding path program 1 times [2023-08-24 02:25:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696412789] [2023-08-24 02:25:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:09,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:09,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696412789] [2023-08-24 02:25:09,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696412789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544005809] [2023-08-24 02:25:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:09,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:09,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 02:25:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:09,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-24 02:25:09,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:09,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544005809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:09,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-08-24 02:25:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709694879] [2023-08-24 02:25:09,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 02:25:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:09,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 02:25:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 02:25:09,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 02:25:09,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 264 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:09,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 02:25:09,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:09,555 INFO L124 PetriNetUnfolderBase]: 122/230 cut-off events. [2023-08-24 02:25:09,556 INFO L125 PetriNetUnfolderBase]: For 643/655 co-relation queries the response was YES. [2023-08-24 02:25:09,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 230 events. 122/230 cut-off events. For 643/655 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 791 event pairs, 8 based on Foata normal form. 16/244 useless extension candidates. Maximal degree in co-relation 840. Up to 113 conditions per place. [2023-08-24 02:25:09,558 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 38 selfloop transitions, 11 changer transitions 10/65 dead transitions. [2023-08-24 02:25:09,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 553 flow [2023-08-24 02:25:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:25:09,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:25:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-08-24 02:25:09,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2023-08-24 02:25:09,559 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-08-24 02:25:09,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-08-24 02:25:09,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:09,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-08-24 02:25:09,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,561 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,561 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 264 flow. Second operand 4 states and 287 transitions. [2023-08-24 02:25:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 553 flow [2023-08-24 02:25:09,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 450 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-24 02:25:09,565 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 303 flow [2023-08-24 02:25:09,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=303, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-08-24 02:25:09,566 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-08-24 02:25:09,566 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 303 flow [2023-08-24 02:25:09,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:09,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:09,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:09,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:09,773 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:09,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 705404704, now seen corresponding path program 2 times [2023-08-24 02:25:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742271568] [2023-08-24 02:25:09,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:09,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742271568] [2023-08-24 02:25:09,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742271568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:09,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400172258] [2023-08-24 02:25:09,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:09,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:09,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:09,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:09,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 02:25:09,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:09,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:09,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:09,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:09,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:09,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400172258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:09,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:09,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 02:25:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965970192] [2023-08-24 02:25:09,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:25:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:25:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-24 02:25:09,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:09,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 303 flow. Second operand has 11 states, 11 states have (on average 53.27272727272727) internal successors, (586), 11 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:09,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:10,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:10,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:10,195 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2023-08-24 02:25:10,195 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2023-08-24 02:25:10,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 293 events. 150/293 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1138 event pairs, 11 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1060. Up to 95 conditions per place. [2023-08-24 02:25:10,197 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 53 selfloop transitions, 23 changer transitions 10/86 dead transitions. [2023-08-24 02:25:10,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 86 transitions, 692 flow [2023-08-24 02:25:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:25:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:25:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 570 transitions. [2023-08-24 02:25:10,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43846153846153846 [2023-08-24 02:25:10,200 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 570 transitions. [2023-08-24 02:25:10,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 570 transitions. [2023-08-24 02:25:10,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:10,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 570 transitions. [2023-08-24 02:25:10,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,203 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 130.0) internal successors, (1430), 11 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,203 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 303 flow. Second operand 10 states and 570 transitions. [2023-08-24 02:25:10,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 86 transitions, 692 flow [2023-08-24 02:25:10,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 676 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 02:25:10,208 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 464 flow [2023-08-24 02:25:10,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-24 02:25:10,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-08-24 02:25:10,209 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 464 flow [2023-08-24 02:25:10,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.27272727272727) internal successors, (586), 11 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:10,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:10,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:10,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:10,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:10,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:10,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1190488878, now seen corresponding path program 3 times [2023-08-24 02:25:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:10,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167934204] [2023-08-24 02:25:10,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:10,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167934204] [2023-08-24 02:25:10,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167934204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:10,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633796983] [2023-08-24 02:25:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:10,491 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:10,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 02:25:10,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:25:10,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:10,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:10,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:10,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:10,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633796983] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:10,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:10,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 02:25:10,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483369404] [2023-08-24 02:25:10,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:10,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 02:25:10,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:10,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 02:25:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 02:25:10,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:10,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 464 flow. Second operand has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:10,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:10,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:10,896 INFO L124 PetriNetUnfolderBase]: 184/334 cut-off events. [2023-08-24 02:25:10,896 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2023-08-24 02:25:10,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1723 conditions, 334 events. 184/334 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1212 event pairs, 20 based on Foata normal form. 20/354 useless extension candidates. Maximal degree in co-relation 1467. Up to 125 conditions per place. [2023-08-24 02:25:10,899 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 58 selfloop transitions, 43 changer transitions 1/102 dead transitions. [2023-08-24 02:25:10,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 1038 flow [2023-08-24 02:25:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:25:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:25:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 787 transitions. [2023-08-24 02:25:10,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43241758241758244 [2023-08-24 02:25:10,902 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 787 transitions. [2023-08-24 02:25:10,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 787 transitions. [2023-08-24 02:25:10,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:10,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 787 transitions. [2023-08-24 02:25:10,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.214285714285715) internal successors, (787), 14 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 130.0) internal successors, (1950), 15 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,907 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 130.0) internal successors, (1950), 15 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,907 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 464 flow. Second operand 14 states and 787 transitions. [2023-08-24 02:25:10,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 1038 flow [2023-08-24 02:25:10,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 942 flow, removed 41 selfloop flow, removed 3 redundant places. [2023-08-24 02:25:10,915 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 794 flow [2023-08-24 02:25:10,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=794, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2023-08-24 02:25:10,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-08-24 02:25:10,916 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 794 flow [2023-08-24 02:25:10,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.92307692307692) internal successors, (688), 13 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:10,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:10,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:10,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:11,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:11,126 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:11,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1707029492, now seen corresponding path program 4 times [2023-08-24 02:25:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:11,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965993032] [2023-08-24 02:25:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965993032] [2023-08-24 02:25:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965993032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240563107] [2023-08-24 02:25:11,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:11,192 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 02:25:11,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:11,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:11,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240563107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:11,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 02:25:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023190307] [2023-08-24 02:25:11,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 02:25:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:11,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 02:25:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 02:25:11,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:11,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 794 flow. Second operand has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:11,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:11,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:11,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:11,507 INFO L124 PetriNetUnfolderBase]: 248/430 cut-off events. [2023-08-24 02:25:11,507 INFO L125 PetriNetUnfolderBase]: For 3986/3986 co-relation queries the response was YES. [2023-08-24 02:25:11,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 430 events. 248/430 cut-off events. For 3986/3986 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1607 event pairs, 33 based on Foata normal form. 12/442 useless extension candidates. Maximal degree in co-relation 2417. Up to 208 conditions per place. [2023-08-24 02:25:11,511 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 59 selfloop transitions, 61 changer transitions 1/121 dead transitions. [2023-08-24 02:25:11,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 121 transitions, 1513 flow [2023-08-24 02:25:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 02:25:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 02:25:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 725 transitions. [2023-08-24 02:25:11,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289940828402367 [2023-08-24 02:25:11,514 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 725 transitions. [2023-08-24 02:25:11,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 725 transitions. [2023-08-24 02:25:11,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:11,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 725 transitions. [2023-08-24 02:25:11,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 55.76923076923077) internal successors, (725), 13 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) [2023-08-24 02:25:11,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:11,518 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:11,518 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 794 flow. Second operand 13 states and 725 transitions. [2023-08-24 02:25:11,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 121 transitions, 1513 flow [2023-08-24 02:25:11,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 121 transitions, 1365 flow, removed 63 selfloop flow, removed 4 redundant places. [2023-08-24 02:25:11,533 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 1199 flow [2023-08-24 02:25:11,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1199, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2023-08-24 02:25:11,533 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2023-08-24 02:25:11,533 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 1199 flow [2023-08-24 02:25:11,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:11,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:11,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:11,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:11,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:11,740 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:11,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:11,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1695763098, now seen corresponding path program 5 times [2023-08-24 02:25:11,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:11,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929387192] [2023-08-24 02:25:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929387192] [2023-08-24 02:25:11,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929387192] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:11,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973835142] [2023-08-24 02:25:11,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:11,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:11,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:11,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 02:25:11,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:25:11,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:11,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:11,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:11,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973835142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:11,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 02:25:11,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898894900] [2023-08-24 02:25:11,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:11,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 02:25:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:11,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 02:25:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 02:25:11,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:11,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 1199 flow. Second operand has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:11,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:11,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:11,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:12,195 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-08-24 02:25:12,196 INFO L125 PetriNetUnfolderBase]: For 5812/5812 co-relation queries the response was YES. [2023-08-24 02:25:12,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2831 conditions, 455 events. 247/455 cut-off events. For 5812/5812 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1840 event pairs, 24 based on Foata normal form. 26/481 useless extension candidates. Maximal degree in co-relation 2603. Up to 175 conditions per place. [2023-08-24 02:25:12,200 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 58 selfloop transitions, 72 changer transitions 1/131 dead transitions. [2023-08-24 02:25:12,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 131 transitions, 1624 flow [2023-08-24 02:25:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:25:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:25:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 894 transitions. [2023-08-24 02:25:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42980769230769234 [2023-08-24 02:25:12,204 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 894 transitions. [2023-08-24 02:25:12,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 894 transitions. [2023-08-24 02:25:12,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:12,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 894 transitions. [2023-08-24 02:25:12,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.875) internal successors, (894), 16 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:12,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:12,213 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:12,213 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 1199 flow. Second operand 16 states and 894 transitions. [2023-08-24 02:25:12,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 131 transitions, 1624 flow [2023-08-24 02:25:12,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 1394 flow, removed 89 selfloop flow, removed 6 redundant places. [2023-08-24 02:25:12,256 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 1172 flow [2023-08-24 02:25:12,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1172, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2023-08-24 02:25:12,257 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-08-24 02:25:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 1172 flow [2023-08-24 02:25:12,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.0) internal successors, (636), 12 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:12,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:12,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:12,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-24 02:25:12,463 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,SelfDestructingSolverStorable11 [2023-08-24 02:25:12,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:12,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash 301002758, now seen corresponding path program 6 times [2023-08-24 02:25:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73756916] [2023-08-24 02:25:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:12,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73756916] [2023-08-24 02:25:12,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73756916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:12,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416602123] [2023-08-24 02:25:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:25:12,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:12,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:12,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 02:25:12,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:25:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:12,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:12,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:12,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:12,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416602123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:12,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:12,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 02:25:12,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572620109] [2023-08-24 02:25:12,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:12,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:12,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 1172 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:12,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:12,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:12,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:13,105 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-08-24 02:25:13,105 INFO L125 PetriNetUnfolderBase]: For 5267/5267 co-relation queries the response was YES. [2023-08-24 02:25:13,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4438 conditions, 722 events. 396/722 cut-off events. For 5267/5267 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3385 event pairs, 30 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4132. Up to 237 conditions per place. [2023-08-24 02:25:13,112 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-08-24 02:25:13,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 2572 flow [2023-08-24 02:25:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 02:25:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 02:25:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1276 transitions. [2023-08-24 02:25:13,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42675585284280937 [2023-08-24 02:25:13,117 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1276 transitions. [2023-08-24 02:25:13,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1276 transitions. [2023-08-24 02:25:13,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:13,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1276 transitions. [2023-08-24 02:25:13,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.47826086956522) internal successors, (1276), 23 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,127 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 130.0) internal successors, (3120), 24 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,127 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 1172 flow. Second operand 23 states and 1276 transitions. [2023-08-24 02:25:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 2572 flow [2023-08-24 02:25:13,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 207 transitions, 2318 flow, removed 42 selfloop flow, removed 12 redundant places. [2023-08-24 02:25:13,151 INFO L231 Difference]: Finished difference. Result has 117 places, 165 transitions, 2132 flow [2023-08-24 02:25:13,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2132, PETRI_PLACES=117, PETRI_TRANSITIONS=165} [2023-08-24 02:25:13,153 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2023-08-24 02:25:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 165 transitions, 2132 flow [2023-08-24 02:25:13,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:13,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:13,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 02:25:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 02:25:13,359 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:13,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:13,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1047082884, now seen corresponding path program 7 times [2023-08-24 02:25:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:13,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389133057] [2023-08-24 02:25:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:13,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:13,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389133057] [2023-08-24 02:25:13,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389133057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:13,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875564587] [2023-08-24 02:25:13,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:13,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:13,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 02:25:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:13,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:13,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:13,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:13,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875564587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:13,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:13,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 02:25:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903220424] [2023-08-24 02:25:13,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:13,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:13,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:13,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 165 transitions, 2132 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:13,928 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-08-24 02:25:13,928 INFO L125 PetriNetUnfolderBase]: For 7634/7634 co-relation queries the response was YES. [2023-08-24 02:25:13,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5396 conditions, 790 events. 438/790 cut-off events. For 7634/7634 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3703 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 4979. Up to 620 conditions per place. [2023-08-24 02:25:13,936 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-08-24 02:25:13,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3199 flow [2023-08-24 02:25:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:25:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:25:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1008 transitions. [2023-08-24 02:25:13,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4307692307692308 [2023-08-24 02:25:13,938 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1008 transitions. [2023-08-24 02:25:13,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1008 transitions. [2023-08-24 02:25:13,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:13,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1008 transitions. [2023-08-24 02:25:13,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 56.0) internal successors, (1008), 18 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 130.0) internal successors, (2470), 19 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,944 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 130.0) internal successors, (2470), 19 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,944 INFO L175 Difference]: Start difference. First operand has 117 places, 165 transitions, 2132 flow. Second operand 18 states and 1008 transitions. [2023-08-24 02:25:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3199 flow [2023-08-24 02:25:13,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 225 transitions, 3037 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-08-24 02:25:13,975 INFO L231 Difference]: Finished difference. Result has 138 places, 193 transitions, 2638 flow [2023-08-24 02:25:13,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2638, PETRI_PLACES=138, PETRI_TRANSITIONS=193} [2023-08-24 02:25:13,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-08-24 02:25:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 193 transitions, 2638 flow [2023-08-24 02:25:13,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:13,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:13,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:13,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:14,183 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,SelfDestructingSolverStorable13 [2023-08-24 02:25:14,183 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:14,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:14,183 INFO L85 PathProgramCache]: Analyzing trace with hash 499970178, now seen corresponding path program 8 times [2023-08-24 02:25:14,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:14,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147459781] [2023-08-24 02:25:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:14,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:14,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:14,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147459781] [2023-08-24 02:25:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147459781] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:14,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121988170] [2023-08-24 02:25:14,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:14,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:14,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:14,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:14,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 02:25:14,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:14,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:14,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:25:14,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:14,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:14,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121988170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:14,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:14,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 02:25:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696885154] [2023-08-24 02:25:14,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 02:25:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 02:25:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-24 02:25:14,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:14,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 193 transitions, 2638 flow. Second operand has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:14,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:14,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:14,670 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-08-24 02:25:14,670 INFO L125 PetriNetUnfolderBase]: For 10446/10446 co-relation queries the response was YES. [2023-08-24 02:25:14,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5778 conditions, 793 events. 443/793 cut-off events. For 10446/10446 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3708 event pairs, 100 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5502. Up to 645 conditions per place. [2023-08-24 02:25:14,680 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-08-24 02:25:14,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 213 transitions, 3314 flow [2023-08-24 02:25:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:25:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:25:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 612 transitions. [2023-08-24 02:25:14,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427972027972028 [2023-08-24 02:25:14,683 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 612 transitions. [2023-08-24 02:25:14,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 612 transitions. [2023-08-24 02:25:14,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:14,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 612 transitions. [2023-08-24 02:25:14,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.63636363636363) internal successors, (612), 11 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:14,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:14,689 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 130.0) internal successors, (1560), 12 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:14,690 INFO L175 Difference]: Start difference. First operand has 138 places, 193 transitions, 2638 flow. Second operand 11 states and 612 transitions. [2023-08-24 02:25:14,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 213 transitions, 3314 flow [2023-08-24 02:25:14,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 213 transitions, 2920 flow, removed 181 selfloop flow, removed 5 redundant places. [2023-08-24 02:25:14,737 INFO L231 Difference]: Finished difference. Result has 144 places, 195 transitions, 2410 flow [2023-08-24 02:25:14,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2410, PETRI_PLACES=144, PETRI_TRANSITIONS=195} [2023-08-24 02:25:14,738 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-08-24 02:25:14,738 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 195 transitions, 2410 flow [2023-08-24 02:25:14,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.0) internal successors, (689), 13 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:14,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:14,739 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:14,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:14,944 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,SelfDestructingSolverStorable14 [2023-08-24 02:25:14,944 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:14,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1757439449, now seen corresponding path program 9 times [2023-08-24 02:25:14,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:14,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155947680] [2023-08-24 02:25:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:14,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:15,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155947680] [2023-08-24 02:25:15,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155947680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:15,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312871000] [2023-08-24 02:25:15,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:15,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:15,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:15,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:15,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 02:25:15,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:25:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:15,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 02:25:15,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:15,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:15,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312871000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:15,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-24 02:25:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534040545] [2023-08-24 02:25:15,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:15,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:25:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:25:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:25:15,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 02:25:15,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 195 transitions, 2410 flow. Second operand has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:15,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 02:25:15,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:15,427 INFO L124 PetriNetUnfolderBase]: 654/1167 cut-off events. [2023-08-24 02:25:15,428 INFO L125 PetriNetUnfolderBase]: For 14409/14421 co-relation queries the response was YES. [2023-08-24 02:25:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8257 conditions, 1167 events. 654/1167 cut-off events. For 14409/14421 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6098 event pairs, 32 based on Foata normal form. 16/1180 useless extension candidates. Maximal degree in co-relation 7813. Up to 620 conditions per place. [2023-08-24 02:25:15,439 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 192 selfloop transitions, 81 changer transitions 47/327 dead transitions. [2023-08-24 02:25:15,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4619 flow [2023-08-24 02:25:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:25:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:25:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-08-24 02:25:15,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553846153846154 [2023-08-24 02:25:15,441 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-08-24 02:25:15,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-08-24 02:25:15,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:15,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-08-24 02:25:15,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,443 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,443 INFO L175 Difference]: Start difference. First operand has 144 places, 195 transitions, 2410 flow. Second operand 5 states and 361 transitions. [2023-08-24 02:25:15,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4619 flow [2023-08-24 02:25:15,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 327 transitions, 4524 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 02:25:15,501 INFO L231 Difference]: Finished difference. Result has 146 places, 241 transitions, 3234 flow [2023-08-24 02:25:15,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3234, PETRI_PLACES=146, PETRI_TRANSITIONS=241} [2023-08-24 02:25:15,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2023-08-24 02:25:15,502 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 241 transitions, 3234 flow [2023-08-24 02:25:15,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:15,503 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:15,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:15,710 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,SelfDestructingSolverStorable15 [2023-08-24 02:25:15,711 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:15,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:15,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1059430198, now seen corresponding path program 10 times [2023-08-24 02:25:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291043659] [2023-08-24 02:25:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:15,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:15,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291043659] [2023-08-24 02:25:15,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291043659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:15,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628801363] [2023-08-24 02:25:15,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:15,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:15,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:15,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 02:25:15,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:15,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:15,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:15,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:15,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628801363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:15,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:15,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 02:25:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49246860] [2023-08-24 02:25:15,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 02:25:15,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 02:25:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-24 02:25:15,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:15,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 241 transitions, 3234 flow. Second operand has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:15,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:15,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:15,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:16,349 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-08-24 02:25:16,349 INFO L125 PetriNetUnfolderBase]: For 19974/19974 co-relation queries the response was YES. [2023-08-24 02:25:16,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10724 conditions, 1418 events. 775/1418 cut-off events. For 19974/19974 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7890 event pairs, 31 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10128. Up to 564 conditions per place. [2023-08-24 02:25:16,367 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-08-24 02:25:16,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 364 transitions, 5482 flow [2023-08-24 02:25:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 02:25:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 02:25:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 737 transitions. [2023-08-24 02:25:16,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609467455621304 [2023-08-24 02:25:16,368 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 737 transitions. [2023-08-24 02:25:16,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 737 transitions. [2023-08-24 02:25:16,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:16,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 737 transitions. [2023-08-24 02:25:16,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 56.69230769230769) internal successors, (737), 13 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:16,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:16,374 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 130.0) internal successors, (1820), 14 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:16,374 INFO L175 Difference]: Start difference. First operand has 146 places, 241 transitions, 3234 flow. Second operand 13 states and 737 transitions. [2023-08-24 02:25:16,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 364 transitions, 5482 flow [2023-08-24 02:25:16,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 364 transitions, 5388 flow, removed 47 selfloop flow, removed 0 redundant places. [2023-08-24 02:25:16,453 INFO L231 Difference]: Finished difference. Result has 166 places, 303 transitions, 4631 flow [2023-08-24 02:25:16,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4631, PETRI_PLACES=166, PETRI_TRANSITIONS=303} [2023-08-24 02:25:16,454 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-08-24 02:25:16,454 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 303 transitions, 4631 flow [2023-08-24 02:25:16,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.857142857142854) internal successors, (740), 14 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:16,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:16,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:16,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:16,660 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,SelfDestructingSolverStorable16 [2023-08-24 02:25:16,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:16,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2111509370, now seen corresponding path program 11 times [2023-08-24 02:25:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996554865] [2023-08-24 02:25:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:16,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:16,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996554865] [2023-08-24 02:25:16,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996554865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:16,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322996578] [2023-08-24 02:25:16,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:16,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:16,744 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:16,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 02:25:16,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:25:16,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:16,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:16,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:16,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322996578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:16,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 02:25:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385558270] [2023-08-24 02:25:16,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 02:25:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 02:25:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 02:25:16,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:16,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 303 transitions, 4631 flow. Second operand has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:16,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:16,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:16,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:17,453 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-08-24 02:25:17,453 INFO L125 PetriNetUnfolderBase]: For 24502/24502 co-relation queries the response was YES. [2023-08-24 02:25:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12260 conditions, 1502 events. 841/1502 cut-off events. For 24502/24502 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8169 event pairs, 79 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 11775. Up to 557 conditions per place. [2023-08-24 02:25:17,475 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-08-24 02:25:17,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 389 transitions, 6413 flow [2023-08-24 02:25:17,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:25:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:25:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1061 transitions. [2023-08-24 02:25:17,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42955465587044533 [2023-08-24 02:25:17,477 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1061 transitions. [2023-08-24 02:25:17,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1061 transitions. [2023-08-24 02:25:17,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:17,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1061 transitions. [2023-08-24 02:25:17,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.8421052631579) internal successors, (1061), 19 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:17,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:17,483 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:17,483 INFO L175 Difference]: Start difference. First operand has 166 places, 303 transitions, 4631 flow. Second operand 19 states and 1061 transitions. [2023-08-24 02:25:17,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 389 transitions, 6413 flow [2023-08-24 02:25:17,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 389 transitions, 6280 flow, removed 58 selfloop flow, removed 3 redundant places. [2023-08-24 02:25:17,596 INFO L231 Difference]: Finished difference. Result has 189 places, 342 transitions, 5685 flow [2023-08-24 02:25:17,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=4532, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5685, PETRI_PLACES=189, PETRI_TRANSITIONS=342} [2023-08-24 02:25:17,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 169 predicate places. [2023-08-24 02:25:17,597 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 342 transitions, 5685 flow [2023-08-24 02:25:17,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:17,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:17,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:17,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:17,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:17,804 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:17,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1640336812, now seen corresponding path program 12 times [2023-08-24 02:25:17,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:17,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368917998] [2023-08-24 02:25:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:17,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:17,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368917998] [2023-08-24 02:25:17,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368917998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:17,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572359692] [2023-08-24 02:25:17,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:25:17,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:17,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:17,887 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 02:25:17,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:25:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:17,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:17,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:18,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:18,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572359692] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:18,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:18,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 02:25:18,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18185321] [2023-08-24 02:25:18,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:18,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:18,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 342 transitions, 5685 flow. Second operand has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:18,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:18,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:18,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:18,630 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-08-24 02:25:18,630 INFO L125 PetriNetUnfolderBase]: For 32569/32569 co-relation queries the response was YES. [2023-08-24 02:25:18,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15388 conditions, 1708 events. 979/1708 cut-off events. For 32569/32569 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9340 event pairs, 137 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 14817. Up to 885 conditions per place. [2023-08-24 02:25:18,652 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-08-24 02:25:18,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 438 transitions, 8318 flow [2023-08-24 02:25:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:25:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 02:25:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1056 transitions. [2023-08-24 02:25:18,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42753036437246966 [2023-08-24 02:25:18,655 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1056 transitions. [2023-08-24 02:25:18,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1056 transitions. [2023-08-24 02:25:18,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:18,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1056 transitions. [2023-08-24 02:25:18,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 55.578947368421055) internal successors, (1056), 19 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:18,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:18,661 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 130.0) internal successors, (2600), 20 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:18,661 INFO L175 Difference]: Start difference. First operand has 189 places, 342 transitions, 5685 flow. Second operand 19 states and 1056 transitions. [2023-08-24 02:25:18,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 438 transitions, 8318 flow [2023-08-24 02:25:18,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 438 transitions, 8059 flow, removed 105 selfloop flow, removed 5 redundant places. [2023-08-24 02:25:18,797 INFO L231 Difference]: Finished difference. Result has 208 places, 399 transitions, 7464 flow [2023-08-24 02:25:18,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7464, PETRI_PLACES=208, PETRI_TRANSITIONS=399} [2023-08-24 02:25:18,798 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-08-24 02:25:18,798 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 399 transitions, 7464 flow [2023-08-24 02:25:18,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.8) internal successors, (792), 15 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:18,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:18,798 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:18,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:19,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:19,004 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:19,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1541102426, now seen corresponding path program 13 times [2023-08-24 02:25:19,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:19,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730674712] [2023-08-24 02:25:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:19,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:19,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:19,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730674712] [2023-08-24 02:25:19,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730674712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:19,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172613717] [2023-08-24 02:25:19,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:19,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:19,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:19,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 02:25:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:19,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:19,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:19,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172613717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:19,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:19,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 02:25:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077896865] [2023-08-24 02:25:19,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:19,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:19,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:19,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:19,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 399 transitions, 7464 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:19,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:19,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:19,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:19,959 INFO L124 PetriNetUnfolderBase]: 994/1765 cut-off events. [2023-08-24 02:25:19,959 INFO L125 PetriNetUnfolderBase]: For 43546/43546 co-relation queries the response was YES. [2023-08-24 02:25:19,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16661 conditions, 1765 events. 994/1765 cut-off events. For 43546/43546 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 9831 event pairs, 66 based on Foata normal form. 42/1807 useless extension candidates. Maximal degree in co-relation 16093. Up to 622 conditions per place. [2023-08-24 02:25:19,977 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 136 selfloop transitions, 317 changer transitions 1/454 dead transitions. [2023-08-24 02:25:19,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 454 transitions, 9027 flow [2023-08-24 02:25:19,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 02:25:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 02:25:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1334 transitions. [2023-08-24 02:25:19,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42756410256410254 [2023-08-24 02:25:19,980 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1334 transitions. [2023-08-24 02:25:19,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1334 transitions. [2023-08-24 02:25:19,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:19,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1334 transitions. [2023-08-24 02:25:19,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.583333333333336) internal successors, (1334), 24 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:19,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:19,987 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:19,987 INFO L175 Difference]: Start difference. First operand has 208 places, 399 transitions, 7464 flow. Second operand 24 states and 1334 transitions. [2023-08-24 02:25:19,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 454 transitions, 9027 flow [2023-08-24 02:25:20,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 454 transitions, 7919 flow, removed 347 selfloop flow, removed 14 redundant places. [2023-08-24 02:25:20,194 INFO L231 Difference]: Finished difference. Result has 218 places, 412 transitions, 7380 flow [2023-08-24 02:25:20,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=6318, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7380, PETRI_PLACES=218, PETRI_TRANSITIONS=412} [2023-08-24 02:25:20,195 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-08-24 02:25:20,195 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 412 transitions, 7380 flow [2023-08-24 02:25:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:20,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:20,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:20,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:20,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:20,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1098685802, now seen corresponding path program 14 times [2023-08-24 02:25:20,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:20,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519567026] [2023-08-24 02:25:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519567026] [2023-08-24 02:25:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519567026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:20,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473579440] [2023-08-24 02:25:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:20,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:20,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:20,488 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 02:25:20,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:20,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:20,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:20,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:20,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473579440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:20,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 02:25:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038430442] [2023-08-24 02:25:20,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:20,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:20,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:20,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 412 transitions, 7380 flow. Second operand has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:20,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:20,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:20,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:21,265 INFO L124 PetriNetUnfolderBase]: 1101/1972 cut-off events. [2023-08-24 02:25:21,265 INFO L125 PetriNetUnfolderBase]: For 43172/43172 co-relation queries the response was YES. [2023-08-24 02:25:21,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17838 conditions, 1972 events. 1101/1972 cut-off events. For 43172/43172 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11430 event pairs, 79 based on Foata normal form. 26/1998 useless extension candidates. Maximal degree in co-relation 17237. Up to 583 conditions per place. [2023-08-24 02:25:21,286 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 224 selfloop transitions, 271 changer transitions 6/501 dead transitions. [2023-08-24 02:25:21,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 501 transitions, 9584 flow [2023-08-24 02:25:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:25:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:25:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1169 transitions. [2023-08-24 02:25:21,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282051282051282 [2023-08-24 02:25:21,289 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1169 transitions. [2023-08-24 02:25:21,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1169 transitions. [2023-08-24 02:25:21,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:21,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1169 transitions. [2023-08-24 02:25:21,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.666666666666664) internal successors, (1169), 21 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:21,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:21,294 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 130.0) internal successors, (2860), 22 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:21,294 INFO L175 Difference]: Start difference. First operand has 218 places, 412 transitions, 7380 flow. Second operand 21 states and 1169 transitions. [2023-08-24 02:25:21,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 501 transitions, 9584 flow [2023-08-24 02:25:21,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 501 transitions, 8900 flow, removed 83 selfloop flow, removed 21 redundant places. [2023-08-24 02:25:21,463 INFO L231 Difference]: Finished difference. Result has 223 places, 450 transitions, 8259 flow [2023-08-24 02:25:21,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=6790, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8259, PETRI_PLACES=223, PETRI_TRANSITIONS=450} [2023-08-24 02:25:21,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-08-24 02:25:21,464 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 450 transitions, 8259 flow [2023-08-24 02:25:21,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.06666666666667) internal successors, (796), 15 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:21,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:21,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:21,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:21,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:21,666 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:21,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1999442078, now seen corresponding path program 15 times [2023-08-24 02:25:21,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:21,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889390258] [2023-08-24 02:25:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:21,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889390258] [2023-08-24 02:25:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889390258] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893125734] [2023-08-24 02:25:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:21,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:21,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:21,750 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:21,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 02:25:21,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:25:21,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:21,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:21,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:21,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893125734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:21,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 02:25:21,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615770501] [2023-08-24 02:25:21,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:25:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:25:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:25:21,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:21,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 450 transitions, 8259 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:21,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:21,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:21,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:22,809 INFO L124 PetriNetUnfolderBase]: 1335/2402 cut-off events. [2023-08-24 02:25:22,809 INFO L125 PetriNetUnfolderBase]: For 54631/54631 co-relation queries the response was YES. [2023-08-24 02:25:22,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22428 conditions, 2402 events. 1335/2402 cut-off events. For 54631/54631 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14661 event pairs, 101 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 21791. Up to 747 conditions per place. [2023-08-24 02:25:22,838 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 284 selfloop transitions, 329 changer transitions 0/613 dead transitions. [2023-08-24 02:25:22,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 613 transitions, 12091 flow [2023-08-24 02:25:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:25:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:25:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1609 transitions. [2023-08-24 02:25:22,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42679045092838197 [2023-08-24 02:25:22,847 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1609 transitions. [2023-08-24 02:25:22,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1609 transitions. [2023-08-24 02:25:22,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:22,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1609 transitions. [2023-08-24 02:25:22,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.48275862068966) internal successors, (1609), 29 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:22,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:22,854 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:22,854 INFO L175 Difference]: Start difference. First operand has 223 places, 450 transitions, 8259 flow. Second operand 29 states and 1609 transitions. [2023-08-24 02:25:22,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 613 transitions, 12091 flow [2023-08-24 02:25:23,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 613 transitions, 11799 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-08-24 02:25:23,105 INFO L231 Difference]: Finished difference. Result has 247 places, 552 transitions, 10989 flow [2023-08-24 02:25:23,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=8064, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10989, PETRI_PLACES=247, PETRI_TRANSITIONS=552} [2023-08-24 02:25:23,106 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-24 02:25:23,106 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 552 transitions, 10989 flow [2023-08-24 02:25:23,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:23,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:23,106 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:23,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:23,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:23,307 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:23,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1545090306, now seen corresponding path program 16 times [2023-08-24 02:25:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:23,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794284393] [2023-08-24 02:25:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794284393] [2023-08-24 02:25:23,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794284393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345801132] [2023-08-24 02:25:23,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:23,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:23,389 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:23,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 02:25:23,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:23,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:23,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:23,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:23,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:23,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345801132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:23,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:23,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-24 02:25:23,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820150754] [2023-08-24 02:25:23,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:23,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:25:23,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:23,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:25:23,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:25:23,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:23,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 552 transitions, 10989 flow. Second operand has 15 states, 15 states have (on average 53.13333333333333) internal successors, (797), 15 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:23,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:23,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:24,484 INFO L124 PetriNetUnfolderBase]: 1659/2972 cut-off events. [2023-08-24 02:25:24,484 INFO L125 PetriNetUnfolderBase]: For 72580/72580 co-relation queries the response was YES. [2023-08-24 02:25:24,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28789 conditions, 2972 events. 1659/2972 cut-off events. For 72580/72580 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 18897 event pairs, 68 based on Foata normal form. 34/3006 useless extension candidates. Maximal degree in co-relation 28105. Up to 799 conditions per place. [2023-08-24 02:25:24,514 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 180 selfloop transitions, 558 changer transitions 9/747 dead transitions. [2023-08-24 02:25:24,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 747 transitions, 15856 flow [2023-08-24 02:25:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 02:25:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 02:25:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1441 transitions. [2023-08-24 02:25:24,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633136094674556 [2023-08-24 02:25:24,517 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1441 transitions. [2023-08-24 02:25:24,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1441 transitions. [2023-08-24 02:25:24,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:24,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1441 transitions. [2023-08-24 02:25:24,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.42307692307692) internal successors, (1441), 26 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:24,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 130.0) internal successors, (3510), 27 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:24,523 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 130.0) internal successors, (3510), 27 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:24,523 INFO L175 Difference]: Start difference. First operand has 247 places, 552 transitions, 10989 flow. Second operand 26 states and 1441 transitions. [2023-08-24 02:25:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 747 transitions, 15856 flow [2023-08-24 02:25:24,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 747 transitions, 15497 flow, removed 146 selfloop flow, removed 6 redundant places. [2023-08-24 02:25:24,882 INFO L231 Difference]: Finished difference. Result has 276 places, 693 transitions, 15230 flow [2023-08-24 02:25:24,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15230, PETRI_PLACES=276, PETRI_TRANSITIONS=693} [2023-08-24 02:25:24,883 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-08-24 02:25:24,883 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 693 transitions, 15230 flow [2023-08-24 02:25:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.13333333333333) internal successors, (797), 15 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:24,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:24,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:24,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:25,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:25,084 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:25,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash -181271078, now seen corresponding path program 17 times [2023-08-24 02:25:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:25,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101414299] [2023-08-24 02:25:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:25,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101414299] [2023-08-24 02:25:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101414299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:25,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771030946] [2023-08-24 02:25:25,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:25,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:25,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:25,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:25,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 02:25:25,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:25:25,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:25,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:25,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:25,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:25,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771030946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:25,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:25,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 02:25:25,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155445598] [2023-08-24 02:25:25,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:25,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:25,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:25,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:25,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 693 transitions, 15230 flow. Second operand has 20 states, 20 states have (on average 52.8) internal successors, (1056), 20 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:26,974 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-08-24 02:25:26,974 INFO L125 PetriNetUnfolderBase]: For 123418/123418 co-relation queries the response was YES. [2023-08-24 02:25:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46052 conditions, 4340 events. 2423/4340 cut-off events. For 123418/123418 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29719 event pairs, 139 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 45319. Up to 1133 conditions per place. [2023-08-24 02:25:27,015 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-08-24 02:25:27,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1094 transitions, 25878 flow [2023-08-24 02:25:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:25:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:25:27,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1993 transitions. [2023-08-24 02:25:27,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42585470085470084 [2023-08-24 02:25:27,018 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1993 transitions. [2023-08-24 02:25:27,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1993 transitions. [2023-08-24 02:25:27,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:27,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1993 transitions. [2023-08-24 02:25:27,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.361111111111114) internal successors, (1993), 36 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:27,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 130.0) internal successors, (4810), 37 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:27,025 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 130.0) internal successors, (4810), 37 states have internal predecessors, (4810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:27,025 INFO L175 Difference]: Start difference. First operand has 276 places, 693 transitions, 15230 flow. Second operand 36 states and 1993 transitions. [2023-08-24 02:25:27,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1094 transitions, 25878 flow [2023-08-24 02:25:27,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1094 transitions, 24762 flow, removed 397 selfloop flow, removed 11 redundant places. [2023-08-24 02:25:27,791 INFO L231 Difference]: Finished difference. Result has 312 places, 1021 transitions, 24604 flow [2023-08-24 02:25:27,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=14478, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24604, PETRI_PLACES=312, PETRI_TRANSITIONS=1021} [2023-08-24 02:25:27,792 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-08-24 02:25:27,792 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 1021 transitions, 24604 flow [2023-08-24 02:25:27,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.8) internal successors, (1056), 20 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:27,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:27,793 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:27,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:27,993 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,SelfDestructingSolverStorable23 [2023-08-24 02:25:27,994 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:27,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 740432096, now seen corresponding path program 18 times [2023-08-24 02:25:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:27,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479196680] [2023-08-24 02:25:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:27,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479196680] [2023-08-24 02:25:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479196680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334273539] [2023-08-24 02:25:28,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:25:28,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:28,083 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:28,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 02:25:28,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:25:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:28,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:28,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:28,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:28,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334273539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:28,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:28,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 02:25:28,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400843717] [2023-08-24 02:25:28,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:28,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:25:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:25:28,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:25:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:28,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 1021 transitions, 24604 flow. Second operand has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:29,984 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-08-24 02:25:29,984 INFO L125 PetriNetUnfolderBase]: For 153069/153069 co-relation queries the response was YES. [2023-08-24 02:25:30,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50191 conditions, 4449 events. 2490/4449 cut-off events. For 153069/153069 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 30261 event pairs, 689 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 49363. Up to 3951 conditions per place. [2023-08-24 02:25:30,029 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-08-24 02:25:30,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1136 transitions, 29140 flow [2023-08-24 02:25:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:25:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:25:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1672 transitions. [2023-08-24 02:25:30,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4287179487179487 [2023-08-24 02:25:30,032 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1672 transitions. [2023-08-24 02:25:30,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1672 transitions. [2023-08-24 02:25:30,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:30,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1672 transitions. [2023-08-24 02:25:30,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.733333333333334) internal successors, (1672), 30 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:30,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:30,038 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:30,038 INFO L175 Difference]: Start difference. First operand has 312 places, 1021 transitions, 24604 flow. Second operand 30 states and 1672 transitions. [2023-08-24 02:25:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1136 transitions, 29140 flow [2023-08-24 02:25:31,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1136 transitions, 28514 flow, removed 267 selfloop flow, removed 10 redundant places. [2023-08-24 02:25:31,068 INFO L231 Difference]: Finished difference. Result has 348 places, 1077 transitions, 26388 flow [2023-08-24 02:25:31,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=23998, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26388, PETRI_PLACES=348, PETRI_TRANSITIONS=1077} [2023-08-24 02:25:31,069 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-08-24 02:25:31,069 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1077 transitions, 26388 flow [2023-08-24 02:25:31,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.6) internal successors, (1052), 20 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:31,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:31,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:31,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:31,270 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,SelfDestructingSolverStorable24 [2023-08-24 02:25:31,270 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:31,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1197540378, now seen corresponding path program 19 times [2023-08-24 02:25:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:31,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407573353] [2023-08-24 02:25:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:31,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:31,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407573353] [2023-08-24 02:25:31,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407573353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:31,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154601738] [2023-08-24 02:25:31,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:25:31,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:31,353 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:31,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 02:25:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:31,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:25:31,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:31,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154601738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:31,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:31,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-24 02:25:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33387470] [2023-08-24 02:25:31,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:25:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:25:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:25:31,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:31,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1077 transitions, 26388 flow. Second operand has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:31,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:31,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:31,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:33,256 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-08-24 02:25:33,256 INFO L125 PetriNetUnfolderBase]: For 147896/147896 co-relation queries the response was YES. [2023-08-24 02:25:33,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49359 conditions, 4434 events. 2496/4434 cut-off events. For 147896/147896 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 29876 event pairs, 710 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 48655. Up to 4069 conditions per place. [2023-08-24 02:25:33,298 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-08-24 02:25:33,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1115 transitions, 29231 flow [2023-08-24 02:25:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:25:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:25:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 886 transitions. [2023-08-24 02:25:33,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596153846153845 [2023-08-24 02:25:33,302 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 886 transitions. [2023-08-24 02:25:33,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 886 transitions. [2023-08-24 02:25:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 886 transitions. [2023-08-24 02:25:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 55.375) internal successors, (886), 16 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:33,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:33,306 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:33,306 INFO L175 Difference]: Start difference. First operand has 348 places, 1077 transitions, 26388 flow. Second operand 16 states and 886 transitions. [2023-08-24 02:25:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1115 transitions, 29231 flow [2023-08-24 02:25:34,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1115 transitions, 27604 flow, removed 790 selfloop flow, removed 6 redundant places. [2023-08-24 02:25:34,415 INFO L231 Difference]: Finished difference. Result has 357 places, 1090 transitions, 25468 flow [2023-08-24 02:25:34,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=24885, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25468, PETRI_PLACES=357, PETRI_TRANSITIONS=1090} [2023-08-24 02:25:34,416 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 337 predicate places. [2023-08-24 02:25:34,416 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1090 transitions, 25468 flow [2023-08-24 02:25:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:34,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:34,417 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:34,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:34,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 02:25:34,617 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:34,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash -268277087, now seen corresponding path program 20 times [2023-08-24 02:25:34,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:34,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446810649] [2023-08-24 02:25:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446810649] [2023-08-24 02:25:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446810649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840314434] [2023-08-24 02:25:34,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:25:34,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:34,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 02:25:34,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:25:34,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:34,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 02:25:34,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:34,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:25:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840314434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:34,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:34,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-24 02:25:34,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092235802] [2023-08-24 02:25:34,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:34,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:25:34,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:34,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:25:34,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:25:34,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 02:25:34,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1090 transitions, 25468 flow. Second operand has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:34,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:34,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 02:25:34,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:36,915 INFO L124 PetriNetUnfolderBase]: 3355/5920 cut-off events. [2023-08-24 02:25:36,915 INFO L125 PetriNetUnfolderBase]: For 169814/169826 co-relation queries the response was YES. [2023-08-24 02:25:36,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62950 conditions, 5920 events. 3355/5920 cut-off events. For 169814/169826 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41914 event pairs, 147 based on Foata normal form. 16/5934 useless extension candidates. Maximal degree in co-relation 61812. Up to 3546 conditions per place. [2023-08-24 02:25:37,009 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 994 selfloop transitions, 448 changer transitions 133/1583 dead transitions. [2023-08-24 02:25:37,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1583 transitions, 39564 flow [2023-08-24 02:25:37,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:25:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:25:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2023-08-24 02:25:37,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5576923076923077 [2023-08-24 02:25:37,011 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 435 transitions. [2023-08-24 02:25:37,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 435 transitions. [2023-08-24 02:25:37,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:37,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 435 transitions. [2023-08-24 02:25:37,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:37,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:37,013 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:37,013 INFO L175 Difference]: Start difference. First operand has 357 places, 1090 transitions, 25468 flow. Second operand 6 states and 435 transitions. [2023-08-24 02:25:37,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1583 transitions, 39564 flow [2023-08-24 02:25:38,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1583 transitions, 39238 flow, removed 71 selfloop flow, removed 9 redundant places. [2023-08-24 02:25:38,823 INFO L231 Difference]: Finished difference. Result has 356 places, 1320 transitions, 31349 flow [2023-08-24 02:25:38,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=25266, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31349, PETRI_PLACES=356, PETRI_TRANSITIONS=1320} [2023-08-24 02:25:38,825 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 336 predicate places. [2023-08-24 02:25:38,825 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1320 transitions, 31349 flow [2023-08-24 02:25:38,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.83333333333333) internal successors, (395), 6 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:38,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:38,825 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:38,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:39,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:39,030 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:39,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1769020758, now seen corresponding path program 21 times [2023-08-24 02:25:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:39,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320136427] [2023-08-24 02:25:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:39,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320136427] [2023-08-24 02:25:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320136427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:39,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578832934] [2023-08-24 02:25:39,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:25:39,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:39,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:39,137 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:39,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 02:25:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 02:25:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:39,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:25:39,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:39,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578832934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:39,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:39,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-08-24 02:25:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671707552] [2023-08-24 02:25:39,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:25:39,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:25:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:25:39,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:39,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1320 transitions, 31349 flow. Second operand has 17 states, 17 states have (on average 52.705882352941174) internal successors, (896), 17 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:39,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:39,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:39,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:42,134 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-08-24 02:25:42,135 INFO L125 PetriNetUnfolderBase]: For 217642/217642 co-relation queries the response was YES. [2023-08-24 02:25:42,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80496 conditions, 7171 events. 4014/7171 cut-off events. For 217642/217642 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 52780 event pairs, 149 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 79074. Up to 3288 conditions per place. [2023-08-24 02:25:42,228 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-08-24 02:25:42,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1764 transitions, 45786 flow [2023-08-24 02:25:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:25:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:25:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 905 transitions. [2023-08-24 02:25:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2023-08-24 02:25:42,230 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 905 transitions. [2023-08-24 02:25:42,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 905 transitions. [2023-08-24 02:25:42,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:42,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 905 transitions. [2023-08-24 02:25:42,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:42,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:42,233 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 130.0) internal successors, (2210), 17 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:42,234 INFO L175 Difference]: Start difference. First operand has 356 places, 1320 transitions, 31349 flow. Second operand 16 states and 905 transitions. [2023-08-24 02:25:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1764 transitions, 45786 flow [2023-08-24 02:25:44,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1764 transitions, 45314 flow, removed 236 selfloop flow, removed 0 redundant places. [2023-08-24 02:25:44,608 INFO L231 Difference]: Finished difference. Result has 381 places, 1631 transitions, 42174 flow [2023-08-24 02:25:44,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=30929, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42174, PETRI_PLACES=381, PETRI_TRANSITIONS=1631} [2023-08-24 02:25:44,615 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 361 predicate places. [2023-08-24 02:25:44,615 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1631 transitions, 42174 flow [2023-08-24 02:25:44,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.705882352941174) internal successors, (896), 17 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:44,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:44,616 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:44,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:44,821 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,SelfDestructingSolverStorable27 [2023-08-24 02:25:44,821 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:44,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 924901992, now seen corresponding path program 22 times [2023-08-24 02:25:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194085427] [2023-08-24 02:25:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:44,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:44,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194085427] [2023-08-24 02:25:44,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194085427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:44,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56494723] [2023-08-24 02:25:44,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:25:44,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:44,929 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:44,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 02:25:45,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:25:45,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:45,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:25:45,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:45,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:45,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56494723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:45,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:45,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 02:25:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663996423] [2023-08-24 02:25:45,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:25:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:45,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:25:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:25:45,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:45,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1631 transitions, 42174 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:45,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:45,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:45,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:49,067 INFO L124 PetriNetUnfolderBase]: 4365/7612 cut-off events. [2023-08-24 02:25:49,067 INFO L125 PetriNetUnfolderBase]: For 276515/276515 co-relation queries the response was YES. [2023-08-24 02:25:49,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91244 conditions, 7612 events. 4365/7612 cut-off events. For 276515/276515 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 55822 event pairs, 667 based on Foata normal form. 22/7634 useless extension candidates. Maximal degree in co-relation 89877. Up to 4255 conditions per place. [2023-08-24 02:25:49,155 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 665 selfloop transitions, 1222 changer transitions 32/1919 dead transitions. [2023-08-24 02:25:49,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1919 transitions, 53469 flow [2023-08-24 02:25:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:25:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:25:49,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1604 transitions. [2023-08-24 02:25:49,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42546419098143234 [2023-08-24 02:25:49,157 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1604 transitions. [2023-08-24 02:25:49,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1604 transitions. [2023-08-24 02:25:49,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:49,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1604 transitions. [2023-08-24 02:25:49,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 55.310344827586206) internal successors, (1604), 29 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:49,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:49,163 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 130.0) internal successors, (3900), 30 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:49,163 INFO L175 Difference]: Start difference. First operand has 381 places, 1631 transitions, 42174 flow. Second operand 29 states and 1604 transitions. [2023-08-24 02:25:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1919 transitions, 53469 flow [2023-08-24 02:25:51,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1919 transitions, 53096 flow, removed 165 selfloop flow, removed 4 redundant places. [2023-08-24 02:25:51,546 INFO L231 Difference]: Finished difference. Result has 408 places, 1831 transitions, 50369 flow [2023-08-24 02:25:51,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=41839, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=50369, PETRI_PLACES=408, PETRI_TRANSITIONS=1831} [2023-08-24 02:25:51,548 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2023-08-24 02:25:51,548 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1831 transitions, 50369 flow [2023-08-24 02:25:51,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:51,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:25:51,549 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:25:51,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 02:25:51,753 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,SelfDestructingSolverStorable28 [2023-08-24 02:25:51,753 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:25:51,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:25:51,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1155824126, now seen corresponding path program 23 times [2023-08-24 02:25:51,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:25:51,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825120672] [2023-08-24 02:25:51,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:25:51,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:25:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:25:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:51,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:25:51,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825120672] [2023-08-24 02:25:51,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825120672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:25:51,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401988570] [2023-08-24 02:25:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:25:51,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:25:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:25:51,872 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:25:51,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 02:25:51,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 02:25:51,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:25:51,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:25:51,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:25:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:52,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:25:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:25:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401988570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:25:52,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:25:52,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 02:25:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137282960] [2023-08-24 02:25:52,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:25:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:25:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:25:52,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:25:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:25:52,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:25:52,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1831 transitions, 50369 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:52,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:25:52,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:25:52,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:25:56,732 INFO L124 PetriNetUnfolderBase]: 4816/8425 cut-off events. [2023-08-24 02:25:56,732 INFO L125 PetriNetUnfolderBase]: For 311919/311919 co-relation queries the response was YES. [2023-08-24 02:25:56,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103463 conditions, 8425 events. 4816/8425 cut-off events. For 311919/311919 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 62291 event pairs, 206 based on Foata normal form. 86/8511 useless extension candidates. Maximal degree in co-relation 102125. Up to 2281 conditions per place. [2023-08-24 02:25:56,832 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 688 selfloop transitions, 1424 changer transitions 15/2127 dead transitions. [2023-08-24 02:25:56,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2127 transitions, 61263 flow [2023-08-24 02:25:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 02:25:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 02:25:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1948 transitions. [2023-08-24 02:25:56,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42813186813186815 [2023-08-24 02:25:56,834 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1948 transitions. [2023-08-24 02:25:56,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1948 transitions. [2023-08-24 02:25:56,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:25:56,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1948 transitions. [2023-08-24 02:25:56,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 55.65714285714286) internal successors, (1948), 35 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:56,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 130.0) internal successors, (4680), 36 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:56,839 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 130.0) internal successors, (4680), 36 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:25:56,839 INFO L175 Difference]: Start difference. First operand has 408 places, 1831 transitions, 50369 flow. Second operand 35 states and 1948 transitions. [2023-08-24 02:25:56,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2127 transitions, 61263 flow [2023-08-24 02:26:00,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2127 transitions, 56703 flow, removed 1275 selfloop flow, removed 17 redundant places. [2023-08-24 02:26:00,677 INFO L231 Difference]: Finished difference. Result has 437 places, 2027 transitions, 56198 flow [2023-08-24 02:26:00,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=46415, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=56198, PETRI_PLACES=437, PETRI_TRANSITIONS=2027} [2023-08-24 02:26:00,678 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 417 predicate places. [2023-08-24 02:26:00,679 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 2027 transitions, 56198 flow [2023-08-24 02:26:00,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:00,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:26:00,679 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:26:00,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 02:26:00,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:00,885 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:26:00,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:26:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash -632607142, now seen corresponding path program 24 times [2023-08-24 02:26:00,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:26:00,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87690710] [2023-08-24 02:26:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:26:00,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:26:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:00,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:26:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87690710] [2023-08-24 02:26:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87690710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:26:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191040330] [2023-08-24 02:26:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:26:00,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:26:00,977 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:26:00,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 02:26:01,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:26:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:26:01,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:26:01,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:26:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:01,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:26:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:01,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191040330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:26:01,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:26:01,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 02:26:01,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206099049] [2023-08-24 02:26:01,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:26:01,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:26:01,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:26:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:26:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:26:01,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:26:01,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 2027 transitions, 56198 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:01,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:26:01,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:26:01,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:26:06,055 INFO L124 PetriNetUnfolderBase]: 4877/8614 cut-off events. [2023-08-24 02:26:06,055 INFO L125 PetriNetUnfolderBase]: For 314769/314769 co-relation queries the response was YES. [2023-08-24 02:26:06,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104256 conditions, 8614 events. 4877/8614 cut-off events. For 314769/314769 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 65088 event pairs, 278 based on Foata normal form. 52/8666 useless extension candidates. Maximal degree in co-relation 102943. Up to 3162 conditions per place. [2023-08-24 02:26:06,157 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 441 selfloop transitions, 1694 changer transitions 1/2136 dead transitions. [2023-08-24 02:26:06,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 2136 transitions, 62055 flow [2023-08-24 02:26:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 02:26:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 02:26:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2048 transitions. [2023-08-24 02:26:06,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257796257796258 [2023-08-24 02:26:06,159 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2048 transitions. [2023-08-24 02:26:06,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2048 transitions. [2023-08-24 02:26:06,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:26:06,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2048 transitions. [2023-08-24 02:26:06,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.351351351351354) internal successors, (2048), 37 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:06,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 130.0) internal successors, (4940), 38 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:06,166 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 130.0) internal successors, (4940), 38 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:06,166 INFO L175 Difference]: Start difference. First operand has 437 places, 2027 transitions, 56198 flow. Second operand 37 states and 2048 transitions. [2023-08-24 02:26:06,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 2136 transitions, 62055 flow [2023-08-24 02:26:10,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2136 transitions, 60622 flow, removed 472 selfloop flow, removed 17 redundant places. [2023-08-24 02:26:10,205 INFO L231 Difference]: Finished difference. Result has 457 places, 2066 transitions, 59960 flow [2023-08-24 02:26:10,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=54788, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1652, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=59960, PETRI_PLACES=457, PETRI_TRANSITIONS=2066} [2023-08-24 02:26:10,207 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-08-24 02:26:10,207 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2066 transitions, 59960 flow [2023-08-24 02:26:10,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:10,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:26:10,208 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:26:10,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 02:26:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:10,413 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:26:10,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:26:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1978128522, now seen corresponding path program 25 times [2023-08-24 02:26:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:26:10,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838914928] [2023-08-24 02:26:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:26:10,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:26:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:10,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:26:10,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838914928] [2023-08-24 02:26:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838914928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:26:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831356860] [2023-08-24 02:26:10,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:26:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:26:10,537 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:26:10,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 02:26:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:10,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:26:10,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:26:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:10,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:26:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831356860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:26:10,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:26:10,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-08-24 02:26:10,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831256321] [2023-08-24 02:26:10,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:26:10,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:26:10,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:26:10,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:26:10,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:26:10,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:26:10,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2066 transitions, 59960 flow. Second operand has 19 states, 19 states have (on average 52.89473684210526) internal successors, (1005), 19 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:10,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:26:10,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:26:10,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:26:15,672 INFO L124 PetriNetUnfolderBase]: 5091/8994 cut-off events. [2023-08-24 02:26:15,673 INFO L125 PetriNetUnfolderBase]: For 315817/315817 co-relation queries the response was YES. [2023-08-24 02:26:15,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112479 conditions, 8994 events. 5091/8994 cut-off events. For 315817/315817 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 68312 event pairs, 521 based on Foata normal form. 12/9006 useless extension candidates. Maximal degree in co-relation 111191. Up to 3657 conditions per place. [2023-08-24 02:26:15,783 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1301 selfloop transitions, 935 changer transitions 0/2236 dead transitions. [2023-08-24 02:26:15,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2236 transitions, 67983 flow [2023-08-24 02:26:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 02:26:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 02:26:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1337 transitions. [2023-08-24 02:26:15,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428525641025641 [2023-08-24 02:26:15,785 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1337 transitions. [2023-08-24 02:26:15,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1337 transitions. [2023-08-24 02:26:15,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:26:15,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1337 transitions. [2023-08-24 02:26:15,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 55.708333333333336) internal successors, (1337), 24 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:15,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 130.0) internal successors, (3250), 25 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:15,788 INFO L175 Difference]: Start difference. First operand has 457 places, 2066 transitions, 59960 flow. Second operand 24 states and 1337 transitions. [2023-08-24 02:26:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2236 transitions, 67983 flow [2023-08-24 02:26:19,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 2236 transitions, 65370 flow, removed 130 selfloop flow, removed 28 redundant places. [2023-08-24 02:26:19,636 INFO L231 Difference]: Finished difference. Result has 458 places, 2148 transitions, 62446 flow [2023-08-24 02:26:19,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=57488, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=854, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=62446, PETRI_PLACES=458, PETRI_TRANSITIONS=2148} [2023-08-24 02:26:19,638 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 438 predicate places. [2023-08-24 02:26:19,638 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 2148 transitions, 62446 flow [2023-08-24 02:26:19,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.89473684210526) internal successors, (1005), 19 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:19,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:26:19,638 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:26:19,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 02:26:19,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:19,841 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:26:19,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:26:19,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1938741882, now seen corresponding path program 26 times [2023-08-24 02:26:19,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:26:19,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466750779] [2023-08-24 02:26:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:26:19,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:26:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:26:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466750779] [2023-08-24 02:26:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466750779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:26:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379196673] [2023-08-24 02:26:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:26:19,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:26:19,937 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:26:19,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 02:26:20,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:26:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:26:20,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:26:20,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:26:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:20,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:26:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:20,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379196673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:26:20,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:26:20,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-08-24 02:26:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549351993] [2023-08-24 02:26:20,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:26:20,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:26:20,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:26:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:26:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:26:20,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:26:20,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 2148 transitions, 62446 flow. Second operand has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:20,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:26:20,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:26:20,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:26:25,740 INFO L124 PetriNetUnfolderBase]: 5427/9604 cut-off events. [2023-08-24 02:26:25,740 INFO L125 PetriNetUnfolderBase]: For 359641/359641 co-relation queries the response was YES. [2023-08-24 02:26:25,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121595 conditions, 9604 events. 5427/9604 cut-off events. For 359641/359641 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 73654 event pairs, 371 based on Foata normal form. 22/9626 useless extension candidates. Maximal degree in co-relation 120269. Up to 2899 conditions per place. [2023-08-24 02:26:25,853 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1099 selfloop transitions, 1260 changer transitions 24/2383 dead transitions. [2023-08-24 02:26:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2383 transitions, 72563 flow [2023-08-24 02:26:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 02:26:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 02:26:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1666 transitions. [2023-08-24 02:26:25,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42717948717948717 [2023-08-24 02:26:25,856 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1666 transitions. [2023-08-24 02:26:25,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1666 transitions. [2023-08-24 02:26:25,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:26:25,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1666 transitions. [2023-08-24 02:26:25,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 55.53333333333333) internal successors, (1666), 30 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:25,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:25,860 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 130.0) internal successors, (4030), 31 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:25,860 INFO L175 Difference]: Start difference. First operand has 458 places, 2148 transitions, 62446 flow. Second operand 30 states and 1666 transitions. [2023-08-24 02:26:25,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2383 transitions, 72563 flow [2023-08-24 02:26:30,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2383 transitions, 71694 flow, removed 326 selfloop flow, removed 8 redundant places. [2023-08-24 02:26:30,345 INFO L231 Difference]: Finished difference. Result has 487 places, 2258 transitions, 68755 flow [2023-08-24 02:26:30,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=61680, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=68755, PETRI_PLACES=487, PETRI_TRANSITIONS=2258} [2023-08-24 02:26:30,347 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 467 predicate places. [2023-08-24 02:26:30,347 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 2258 transitions, 68755 flow [2023-08-24 02:26:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.888888888888886) internal successors, (952), 18 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:30,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:26:30,348 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:26:30,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-24 02:26:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:30,548 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:26:30,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:26:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1656576866, now seen corresponding path program 27 times [2023-08-24 02:26:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:26:30,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054099902] [2023-08-24 02:26:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:26:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:26:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:26:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054099902] [2023-08-24 02:26:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054099902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:26:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713143926] [2023-08-24 02:26:30,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:26:30,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:30,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:26:30,637 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:26:30,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 02:26:30,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 02:26:30,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:26:30,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:26:30,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:26:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:30,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:26:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:30,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713143926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:26:30,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:26:30,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-08-24 02:26:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609571356] [2023-08-24 02:26:30,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:26:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:26:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:26:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:26:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:26:30,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:26:30,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 2258 transitions, 68755 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:30,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:26:30,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:26:30,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:26:37,474 INFO L124 PetriNetUnfolderBase]: 6041/10712 cut-off events. [2023-08-24 02:26:37,474 INFO L125 PetriNetUnfolderBase]: For 434139/434139 co-relation queries the response was YES. [2023-08-24 02:26:37,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139461 conditions, 10712 events. 6041/10712 cut-off events. For 434139/434139 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 83585 event pairs, 152 based on Foata normal form. 70/10782 useless extension candidates. Maximal degree in co-relation 138455. Up to 2915 conditions per place. [2023-08-24 02:26:37,611 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 443 selfloop transitions, 2159 changer transitions 26/2628 dead transitions. [2023-08-24 02:26:37,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 2628 transitions, 83686 flow [2023-08-24 02:26:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:26:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:26:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1772 transitions. [2023-08-24 02:26:37,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596153846153845 [2023-08-24 02:26:37,613 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1772 transitions. [2023-08-24 02:26:37,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1772 transitions. [2023-08-24 02:26:37,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:26:37,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1772 transitions. [2023-08-24 02:26:37,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.375) internal successors, (1772), 32 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:37,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:37,619 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:37,619 INFO L175 Difference]: Start difference. First operand has 487 places, 2258 transitions, 68755 flow. Second operand 32 states and 1772 transitions. [2023-08-24 02:26:37,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 2628 transitions, 83686 flow [2023-08-24 02:26:43,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 2628 transitions, 82146 flow, removed 423 selfloop flow, removed 14 redundant places. [2023-08-24 02:26:43,768 INFO L231 Difference]: Finished difference. Result has 510 places, 2518 transitions, 81830 flow [2023-08-24 02:26:43,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=67310, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=81830, PETRI_PLACES=510, PETRI_TRANSITIONS=2518} [2023-08-24 02:26:43,770 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 490 predicate places. [2023-08-24 02:26:43,770 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 2518 transitions, 81830 flow [2023-08-24 02:26:43,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:43,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:26:43,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:26:43,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 02:26:43,970 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,SelfDestructingSolverStorable33 [2023-08-24 02:26:43,971 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:26:43,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:26:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1887955518, now seen corresponding path program 28 times [2023-08-24 02:26:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:26:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595414229] [2023-08-24 02:26:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:26:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:26:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:26:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:26:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595414229] [2023-08-24 02:26:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595414229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:26:44,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927895959] [2023-08-24 02:26:44,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:26:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:26:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:26:44,069 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:26:44,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 02:26:44,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:26:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:26:44,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:26:44,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:26:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:44,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:26:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:26:44,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927895959] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:26:44,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:26:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-08-24 02:26:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409268446] [2023-08-24 02:26:44,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:26:44,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:26:44,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:26:44,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:26:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:26:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:26:44,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 2518 transitions, 81830 flow. Second operand has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:44,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:26:44,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:26:44,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:26:51,572 INFO L124 PetriNetUnfolderBase]: 6299/11172 cut-off events. [2023-08-24 02:26:51,573 INFO L125 PetriNetUnfolderBase]: For 493236/493236 co-relation queries the response was YES. [2023-08-24 02:26:51,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153042 conditions, 11172 events. 6299/11172 cut-off events. For 493236/493236 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 88029 event pairs, 309 based on Foata normal form. 22/11194 useless extension candidates. Maximal degree in co-relation 151931. Up to 2817 conditions per place. [2023-08-24 02:26:51,729 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 986 selfloop transitions, 1748 changer transitions 12/2746 dead transitions. [2023-08-24 02:26:51,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2746 transitions, 92969 flow [2023-08-24 02:26:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 02:26:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 02:26:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1884 transitions. [2023-08-24 02:26:51,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262443438914027 [2023-08-24 02:26:51,732 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1884 transitions. [2023-08-24 02:26:51,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1884 transitions. [2023-08-24 02:26:51,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:26:51,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1884 transitions. [2023-08-24 02:26:51,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.411764705882355) internal successors, (1884), 34 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:51,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 130.0) internal successors, (4550), 35 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:51,737 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 130.0) internal successors, (4550), 35 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:26:51,737 INFO L175 Difference]: Start difference. First operand has 510 places, 2518 transitions, 81830 flow. Second operand 34 states and 1884 transitions. [2023-08-24 02:26:51,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2746 transitions, 92969 flow [2023-08-24 02:27:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 2746 transitions, 91405 flow, removed 524 selfloop flow, removed 13 redundant places. [2023-08-24 02:27:00,416 INFO L231 Difference]: Finished difference. Result has 540 places, 2640 transitions, 89487 flow [2023-08-24 02:27:00,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=80352, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=89487, PETRI_PLACES=540, PETRI_TRANSITIONS=2640} [2023-08-24 02:27:00,417 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-24 02:27:00,417 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 2640 transitions, 89487 flow [2023-08-24 02:27:00,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.94444444444444) internal successors, (953), 18 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:00,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:00,418 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:00,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 02:27:00,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:00,618 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:27:00,619 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1041543878, now seen corresponding path program 29 times [2023-08-24 02:27:00,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:00,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452442110] [2023-08-24 02:27:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452442110] [2023-08-24 02:27:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452442110] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384858896] [2023-08-24 02:27:00,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:27:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:00,720 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:00,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 02:27:00,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:27:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:27:00,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:27:00,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:00,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:27:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384858896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:27:00,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:27:00,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-08-24 02:27:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587798764] [2023-08-24 02:27:00,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:27:00,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:27:00,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:27:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:27:00,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:27:00,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 2640 transitions, 89487 flow. Second operand has 21 states, 21 states have (on average 52.80952380952381) internal successors, (1109), 21 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:00,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:00,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:27:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:10,012 INFO L124 PetriNetUnfolderBase]: 6729/11984 cut-off events. [2023-08-24 02:27:10,012 INFO L125 PetriNetUnfolderBase]: For 582236/582236 co-relation queries the response was YES. [2023-08-24 02:27:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170609 conditions, 11984 events. 6729/11984 cut-off events. For 582236/582236 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 96356 event pairs, 569 based on Foata normal form. 10/11994 useless extension candidates. Maximal degree in co-relation 169475. Up to 4213 conditions per place. [2023-08-24 02:27:10,177 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1518 selfloop transitions, 1434 changer transitions 0/2952 dead transitions. [2023-08-24 02:27:10,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 2952 transitions, 104324 flow [2023-08-24 02:27:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 02:27:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 02:27:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2325 transitions. [2023-08-24 02:27:10,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258241758241758 [2023-08-24 02:27:10,180 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2325 transitions. [2023-08-24 02:27:10,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2325 transitions. [2023-08-24 02:27:10,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:10,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2325 transitions. [2023-08-24 02:27:10,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.357142857142854) internal successors, (2325), 42 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:10,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 130.0) internal successors, (5590), 43 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:10,187 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 130.0) internal successors, (5590), 43 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:10,187 INFO L175 Difference]: Start difference. First operand has 540 places, 2640 transitions, 89487 flow. Second operand 42 states and 2325 transitions. [2023-08-24 02:27:10,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 2952 transitions, 104324 flow [2023-08-24 02:27:20,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 2952 transitions, 103245 flow, removed 353 selfloop flow, removed 12 redundant places. [2023-08-24 02:27:20,712 INFO L231 Difference]: Finished difference. Result has 573 places, 2819 transitions, 98959 flow [2023-08-24 02:27:20,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=88490, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=98959, PETRI_PLACES=573, PETRI_TRANSITIONS=2819} [2023-08-24 02:27:20,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 553 predicate places. [2023-08-24 02:27:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 2819 transitions, 98959 flow [2023-08-24 02:27:20,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.80952380952381) internal successors, (1109), 21 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:20,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:20,715 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:20,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-24 02:27:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:20,915 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:27:20,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1712429018, now seen corresponding path program 30 times [2023-08-24 02:27:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233093979] [2023-08-24 02:27:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233093979] [2023-08-24 02:27:21,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233093979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561326052] [2023-08-24 02:27:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:27:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:21,013 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:21,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 02:27:21,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:27:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:27:21,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:27:21,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:21,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:27:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:21,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561326052] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:27:21,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:27:21,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-08-24 02:27:21,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620035370] [2023-08-24 02:27:21,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:27:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 02:27:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 02:27:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:27:21,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:27:21,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 2819 transitions, 98959 flow. Second operand has 19 states, 19 states have (on average 52.68421052631579) internal successors, (1001), 19 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:21,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:21,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:27:21,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:33,629 INFO L124 PetriNetUnfolderBase]: 8611/15270 cut-off events. [2023-08-24 02:27:33,629 INFO L125 PetriNetUnfolderBase]: For 776196/776196 co-relation queries the response was YES. [2023-08-24 02:27:33,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220773 conditions, 15270 events. 8611/15270 cut-off events. For 776196/776196 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 125968 event pairs, 243 based on Foata normal form. 82/15352 useless extension candidates. Maximal degree in co-relation 219433. Up to 4083 conditions per place. [2023-08-24 02:27:33,866 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 604 selfloop transitions, 3084 changer transitions 41/3729 dead transitions. [2023-08-24 02:27:33,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 3729 transitions, 135364 flow [2023-08-24 02:27:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 02:27:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 02:27:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2214 transitions. [2023-08-24 02:27:33,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257692307692308 [2023-08-24 02:27:33,868 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2214 transitions. [2023-08-24 02:27:33,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2214 transitions. [2023-08-24 02:27:33,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:33,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2214 transitions. [2023-08-24 02:27:33,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.35) internal successors, (2214), 40 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:33,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 130.0) internal successors, (5330), 41 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:33,876 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 130.0) internal successors, (5330), 41 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:33,876 INFO L175 Difference]: Start difference. First operand has 573 places, 2819 transitions, 98959 flow. Second operand 40 states and 2214 transitions. [2023-08-24 02:27:33,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 3729 transitions, 135364 flow [2023-08-24 02:27:51,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 3729 transitions, 134139 flow, removed 534 selfloop flow, removed 9 redundant places. [2023-08-24 02:27:51,877 INFO L231 Difference]: Finished difference. Result has 615 places, 3614 transitions, 134575 flow [2023-08-24 02:27:51,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=98021, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=134575, PETRI_PLACES=615, PETRI_TRANSITIONS=3614} [2023-08-24 02:27:51,880 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 595 predicate places. [2023-08-24 02:27:51,880 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 3614 transitions, 134575 flow [2023-08-24 02:27:51,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 52.68421052631579) internal successors, (1001), 19 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:51,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:51,880 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:51,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-24 02:27:52,080 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,SelfDestructingSolverStorable36 [2023-08-24 02:27:52,081 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:27:52,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:52,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2136054518, now seen corresponding path program 31 times [2023-08-24 02:27:52,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:52,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638087170] [2023-08-24 02:27:52,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:52,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:52,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638087170] [2023-08-24 02:27:52,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638087170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:52,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973109530] [2023-08-24 02:27:52,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:27:52,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:52,189 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:52,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 02:27:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:52,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:27:52,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:52,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:27:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973109530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:27:52,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:27:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-24 02:27:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188631501] [2023-08-24 02:27:52,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:27:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 02:27:52,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 02:27:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-08-24 02:27:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:27:52,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 3614 transitions, 134575 flow. Second operand has 23 states, 23 states have (on average 52.73913043478261) internal successors, (1213), 23 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:52,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:52,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:27:52,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:28:13,200 INFO L124 PetriNetUnfolderBase]: 9154/16303 cut-off events. [2023-08-24 02:28:13,201 INFO L125 PetriNetUnfolderBase]: For 929477/929477 co-relation queries the response was YES. [2023-08-24 02:28:13,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250196 conditions, 16303 events. 9154/16303 cut-off events. For 929477/929477 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 137369 event pairs, 753 based on Foata normal form. 18/16321 useless extension candidates. Maximal degree in co-relation 248789. Up to 5057 conditions per place. [2023-08-24 02:28:13,453 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1728 selfloop transitions, 2239 changer transitions 16/3983 dead transitions. [2023-08-24 02:28:13,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 658 places, 3983 transitions, 154740 flow [2023-08-24 02:28:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 02:28:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 02:28:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2434 transitions. [2023-08-24 02:28:13,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42552447552447553 [2023-08-24 02:28:13,456 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2434 transitions. [2023-08-24 02:28:13,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2434 transitions. [2023-08-24 02:28:13,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:28:13,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2434 transitions. [2023-08-24 02:28:13,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 55.31818181818182) internal successors, (2434), 44 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 130.0) internal successors, (5850), 45 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,463 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 130.0) internal successors, (5850), 45 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,463 INFO L175 Difference]: Start difference. First operand has 615 places, 3614 transitions, 134575 flow. Second operand 44 states and 2434 transitions. [2023-08-24 02:28:13,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 658 places, 3983 transitions, 154740 flow [2023-08-24 02:28:39,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 3983 transitions, 152199 flow, removed 985 selfloop flow, removed 14 redundant places. [2023-08-24 02:28:39,441 INFO L231 Difference]: Finished difference. Result has 652 places, 3873 transitions, 148408 flow [2023-08-24 02:28:39,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=132278, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=148408, PETRI_PLACES=652, PETRI_TRANSITIONS=3873} [2023-08-24 02:28:39,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 632 predicate places. [2023-08-24 02:28:39,445 INFO L495 AbstractCegarLoop]: Abstraction has has 652 places, 3873 transitions, 148408 flow [2023-08-24 02:28:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 52.73913043478261) internal successors, (1213), 23 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:39,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:28:39,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:28:39,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 02:28:39,651 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,SelfDestructingSolverStorable37 [2023-08-24 02:28:39,651 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:28:39,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:28:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash -524472968, now seen corresponding path program 32 times [2023-08-24 02:28:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:28:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020447164] [2023-08-24 02:28:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:28:39,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:28:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:28:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:39,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:28:39,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020447164] [2023-08-24 02:28:39,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020447164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:28:39,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570905677] [2023-08-24 02:28:39,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:28:39,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:28:39,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:28:39,765 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:28:39,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 02:28:39,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:28:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:28:39,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:28:39,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:28:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:39,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:28:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570905677] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:28:40,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:28:40,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 02:28:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801011161] [2023-08-24 02:28:40,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:28:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:28:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:28:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:28:40,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:28:40,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:28:40,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 3873 transitions, 148408 flow. Second operand has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:40,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:28:40,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:28:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:29:06,161 INFO L124 PetriNetUnfolderBase]: 12707/22676 cut-off events. [2023-08-24 02:29:06,161 INFO L125 PetriNetUnfolderBase]: For 1413445/1413445 co-relation queries the response was YES. [2023-08-24 02:29:06,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358443 conditions, 22676 events. 12707/22676 cut-off events. For 1413445/1413445 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 200236 event pairs, 738 based on Foata normal form. 50/22726 useless extension candidates. Maximal degree in co-relation 357003. Up to 5881 conditions per place. [2023-08-24 02:29:06,775 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 1493 selfloop transitions, 3974 changer transitions 53/5520 dead transitions. [2023-08-24 02:29:06,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 5520 transitions, 225976 flow [2023-08-24 02:29:06,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 02:29:06,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 02:29:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2875 transitions. [2023-08-24 02:29:06,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42529585798816566 [2023-08-24 02:29:06,778 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2875 transitions. [2023-08-24 02:29:06,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2875 transitions. [2023-08-24 02:29:06,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:29:06,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2875 transitions. [2023-08-24 02:29:06,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 55.28846153846154) internal successors, (2875), 52 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:29:06,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 130.0) internal successors, (6890), 53 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:29:06,785 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 130.0) internal successors, (6890), 53 states have internal predecessors, (6890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:29:06,785 INFO L175 Difference]: Start difference. First operand has 652 places, 3873 transitions, 148408 flow. Second operand 52 states and 2875 transitions. [2023-08-24 02:29:06,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 5520 transitions, 225976 flow [2023-08-24 02:30:02,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 5520 transitions, 224309 flow, removed 763 selfloop flow, removed 7 redundant places. [2023-08-24 02:30:02,871 INFO L231 Difference]: Finished difference. Result has 709 places, 5372 transitions, 223599 flow [2023-08-24 02:30:02,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=147532, PETRI_DIFFERENCE_MINUEND_PLACES=645, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=223599, PETRI_PLACES=709, PETRI_TRANSITIONS=5372} [2023-08-24 02:30:02,874 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 689 predicate places. [2023-08-24 02:30:02,874 INFO L495 AbstractCegarLoop]: Abstraction has has 709 places, 5372 transitions, 223599 flow [2023-08-24 02:30:02,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.72) internal successors, (1318), 25 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:30:02,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:30:02,875 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:30:02,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 02:30:03,081 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,SelfDestructingSolverStorable38 [2023-08-24 02:30:03,082 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:30:03,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:30:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash -689596014, now seen corresponding path program 33 times [2023-08-24 02:30:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:30:03,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340508044] [2023-08-24 02:30:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:30:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:30:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:30:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:30:03,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:30:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340508044] [2023-08-24 02:30:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340508044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:30:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516518613] [2023-08-24 02:30:03,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:30:03,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:30:03,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:30:03,174 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:30:03,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 02:30:03,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 02:30:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:30:03,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:30:03,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:30:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:30:03,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:30:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:30:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516518613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:30:03,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:30:03,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-08-24 02:30:03,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497855002] [2023-08-24 02:30:03,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:30:03,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:30:03,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:30:03,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:30:03,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:30:03,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:30:03,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 5372 transitions, 223599 flow. Second operand has 21 states, 21 states have (on average 52.714285714285715) internal successors, (1107), 21 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:30:03,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:30:03,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:30:03,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:30:45,518 INFO L124 PetriNetUnfolderBase]: 12750/22657 cut-off events. [2023-08-24 02:30:45,518 INFO L125 PetriNetUnfolderBase]: For 1438018/1438018 co-relation queries the response was YES. [2023-08-24 02:30:45,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375683 conditions, 22657 events. 12750/22657 cut-off events. For 1438018/1438018 co-relation queries the response was YES. Maximal size of possible extension queue 1563. Compared 197482 event pairs, 3946 based on Foata normal form. 20/22677 useless extension candidates. Maximal degree in co-relation 373801. Up to 21898 conditions per place. [2023-08-24 02:30:46,252 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5202 selfloop transitions, 274 changer transitions 7/5483 dead transitions. [2023-08-24 02:30:46,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 5483 transitions, 237696 flow [2023-08-24 02:30:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 02:30:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 02:30:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1222 transitions. [2023-08-24 02:30:46,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2023-08-24 02:30:46,255 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1222 transitions. [2023-08-24 02:30:46,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1222 transitions. [2023-08-24 02:30:46,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:30:46,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1222 transitions. [2023-08-24 02:30:46,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 55.54545454545455) internal successors, (1222), 22 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:30:46,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 130.0) internal successors, (2990), 23 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:30:46,258 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 130.0) internal successors, (2990), 23 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:30:46,258 INFO L175 Difference]: Start difference. First operand has 709 places, 5372 transitions, 223599 flow. Second operand 22 states and 1222 transitions. [2023-08-24 02:30:46,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 5483 transitions, 237696 flow [2023-08-24 02:31:59,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 5483 transitions, 236397 flow, removed 539 selfloop flow, removed 13 redundant places. [2023-08-24 02:31:59,312 INFO L231 Difference]: Finished difference. Result has 719 places, 5447 transitions, 225465 flow [2023-08-24 02:31:59,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=222300, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=225465, PETRI_PLACES=719, PETRI_TRANSITIONS=5447} [2023-08-24 02:31:59,316 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 699 predicate places. [2023-08-24 02:31:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 719 places, 5447 transitions, 225465 flow [2023-08-24 02:31:59,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.714285714285715) internal successors, (1107), 21 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:59,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:31:59,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:31:59,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 02:31:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 02:31:59,517 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:31:59,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:31:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash 837446760, now seen corresponding path program 34 times [2023-08-24 02:31:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:31:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367041307] [2023-08-24 02:31:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:31:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:31:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:31:59,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:31:59,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367041307] [2023-08-24 02:31:59,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367041307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:31:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720449782] [2023-08-24 02:31:59,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:31:59,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:31:59,615 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) [2023-08-24 02:31:59,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 02:31:59,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:31:59,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:31:59,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:31:59,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:31:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:31:59,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:31:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:31:59,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720449782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:31:59,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:31:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 22 [2023-08-24 02:31:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678841545] [2023-08-24 02:31:59,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:31:59,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 02:31:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:31:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 02:31:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:31:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:31:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 719 places, 5447 transitions, 225465 flow. Second operand has 22 states, 22 states have (on average 52.59090909090909) internal successors, (1157), 22 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:31:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:31:59,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:34,852 INFO L124 PetriNetUnfolderBase]: 12829/22823 cut-off events. [2023-08-24 02:32:34,852 INFO L125 PetriNetUnfolderBase]: For 1473177/1473177 co-relation queries the response was YES. [2023-08-24 02:32:35,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373140 conditions, 22823 events. 12829/22823 cut-off events. For 1473177/1473177 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 199473 event pairs, 3915 based on Foata normal form. 76/22899 useless extension candidates. Maximal degree in co-relation 371751. Up to 21616 conditions per place. [2023-08-24 02:32:35,482 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5205 selfloop transitions, 333 changer transitions 7/5545 dead transitions. [2023-08-24 02:32:35,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 5545 transitions, 237963 flow [2023-08-24 02:32:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 02:32:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 02:32:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1777 transitions. [2023-08-24 02:32:35,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4271634615384615 [2023-08-24 02:32:35,484 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1777 transitions. [2023-08-24 02:32:35,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1777 transitions. [2023-08-24 02:32:35,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:35,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1777 transitions. [2023-08-24 02:32:35,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.53125) internal successors, (1777), 32 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:35,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:35,487 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 130.0) internal successors, (4290), 33 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:35,487 INFO L175 Difference]: Start difference. First operand has 719 places, 5447 transitions, 225465 flow. Second operand 32 states and 1777 transitions. [2023-08-24 02:32:35,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 5545 transitions, 237963 flow [2023-08-24 02:33:45,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 5545 transitions, 236112 flow, removed 580 selfloop flow, removed 23 redundant places. [2023-08-24 02:33:45,569 INFO L231 Difference]: Finished difference. Result has 731 places, 5487 transitions, 225401 flow [2023-08-24 02:33:45,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=223506, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=225401, PETRI_PLACES=731, PETRI_TRANSITIONS=5487} [2023-08-24 02:33:45,574 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 711 predicate places. [2023-08-24 02:33:45,574 INFO L495 AbstractCegarLoop]: Abstraction has has 731 places, 5487 transitions, 225401 flow [2023-08-24 02:33:45,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.59090909090909) internal successors, (1157), 22 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:45,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:33:45,574 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:33:45,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 02:33:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:45,785 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:33:45,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:33:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1713500944, now seen corresponding path program 35 times [2023-08-24 02:33:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:33:45,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447528036] [2023-08-24 02:33:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:33:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:33:45,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:33:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447528036] [2023-08-24 02:33:45,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447528036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:33:45,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075645309] [2023-08-24 02:33:45,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:33:45,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:33:45,897 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) [2023-08-24 02:33:45,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 02:33:45,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:33:45,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:33:45,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:33:45,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:33:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:33:46,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:33:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:33:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075645309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:33:46,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:33:46,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-08-24 02:33:46,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050857941] [2023-08-24 02:33:46,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:33:46,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:33:46,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:33:46,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:33:46,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-08-24 02:33:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:33:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 731 places, 5487 transitions, 225401 flow. Second operand has 25 states, 25 states have (on average 52.64) internal successors, (1316), 25 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:33:46,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:33:46,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:34:23,217 INFO L124 PetriNetUnfolderBase]: 12960/23080 cut-off events. [2023-08-24 02:34:23,217 INFO L125 PetriNetUnfolderBase]: For 1455402/1455402 co-relation queries the response was YES. [2023-08-24 02:34:23,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375233 conditions, 23080 events. 12960/23080 cut-off events. For 1455402/1455402 co-relation queries the response was YES. Maximal size of possible extension queue 1608. Compared 202468 event pairs, 3903 based on Foata normal form. 28/23102 useless extension candidates. Maximal degree in co-relation 373502. Up to 21536 conditions per place. [2023-08-24 02:34:23,739 INFO L140 encePairwiseOnDemand]: 124/130 looper letters, 5218 selfloop transitions, 407 changer transitions 29/5654 dead transitions. [2023-08-24 02:34:23,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 5654 transitions, 240323 flow [2023-08-24 02:34:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 02:34:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 02:34:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2487 transitions. [2023-08-24 02:34:23,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42512820512820515 [2023-08-24 02:34:23,742 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2487 transitions. [2023-08-24 02:34:23,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2487 transitions. [2023-08-24 02:34:23,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:34:23,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2487 transitions. [2023-08-24 02:34:23,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.266666666666666) internal successors, (2487), 45 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:23,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 130.0) internal successors, (5980), 46 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:23,747 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 130.0) internal successors, (5980), 46 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:23,747 INFO L175 Difference]: Start difference. First operand has 731 places, 5487 transitions, 225401 flow. Second operand 45 states and 2487 transitions. [2023-08-24 02:34:23,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 5654 transitions, 240323 flow [2023-08-24 02:35:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 5654 transitions, 238621 flow, removed 595 selfloop flow, removed 16 redundant places. [2023-08-24 02:35:33,014 INFO L231 Difference]: Finished difference. Result has 762 places, 5548 transitions, 226926 flow [2023-08-24 02:35:33,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=224119, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=226926, PETRI_PLACES=762, PETRI_TRANSITIONS=5548} [2023-08-24 02:35:33,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 742 predicate places. [2023-08-24 02:35:33,018 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 5548 transitions, 226926 flow [2023-08-24 02:35:33,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.64) internal successors, (1316), 25 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:35:33,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:35:33,019 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:35:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 02:35:33,223 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,SelfDestructingSolverStorable41 [2023-08-24 02:35:33,224 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:35:33,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:35:33,224 INFO L85 PathProgramCache]: Analyzing trace with hash 159736193, now seen corresponding path program 36 times [2023-08-24 02:35:33,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:35:33,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857356062] [2023-08-24 02:35:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:35:33,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:35:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:35:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:35:33,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:35:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857356062] [2023-08-24 02:35:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857356062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:35:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927910585] [2023-08-24 02:35:33,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:35:33,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:35:33,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:35:33,333 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) [2023-08-24 02:35:33,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 02:35:33,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 02:35:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:35:33,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 02:35:33,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:35:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:35:33,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:35:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:35:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927910585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:35:33,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:35:33,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-08-24 02:35:33,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440149097] [2023-08-24 02:35:33,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:35:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 02:35:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:35:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 02:35:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-24 02:35:33,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 130 [2023-08-24 02:35:33,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 5548 transitions, 226926 flow. Second operand has 7 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:35:33,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:35:33,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 130 [2023-08-24 02:35:33,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:36:24,432 INFO L124 PetriNetUnfolderBase]: 16063/28456 cut-off events. [2023-08-24 02:36:24,432 INFO L125 PetriNetUnfolderBase]: For 1682210/1682222 co-relation queries the response was YES. [2023-08-24 02:36:25,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451883 conditions, 28456 events. 16063/28456 cut-off events. For 1682210/1682222 co-relation queries the response was YES. Maximal size of possible extension queue 2045. Compared 255825 event pairs, 738 based on Foata normal form. 16/28432 useless extension candidates. Maximal degree in co-relation 449162. Up to 18797 conditions per place. [2023-08-24 02:36:25,493 INFO L140 encePairwiseOnDemand]: 126/130 looper letters, 4969 selfloop transitions, 1940 changer transitions 344/7262 dead transitions. [2023-08-24 02:36:25,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 7262 transitions, 305601 flow [2023-08-24 02:36:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 02:36:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 02:36:25,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2023-08-24 02:36:25,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5593406593406594 [2023-08-24 02:36:25,495 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2023-08-24 02:36:25,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2023-08-24 02:36:25,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:36:25,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2023-08-24 02:36:25,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:36:25,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:36:25,496 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:36:25,496 INFO L175 Difference]: Start difference. First operand has 762 places, 5548 transitions, 226926 flow. Second operand 7 states and 509 transitions. [2023-08-24 02:36:25,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 7262 transitions, 305601 flow [2023-08-24 02:38:01,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 7262 transitions, 304056 flow, removed 598 selfloop flow, removed 15 redundant places. [2023-08-24 02:38:01,471 INFO L231 Difference]: Finished difference. Result has 758 places, 6462 transitions, 259540 flow [2023-08-24 02:38:01,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=130, PETRI_DIFFERENCE_MINUEND_FLOW=226102, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=259540, PETRI_PLACES=758, PETRI_TRANSITIONS=6462} [2023-08-24 02:38:01,476 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 738 predicate places. [2023-08-24 02:38:01,476 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 6462 transitions, 259540 flow [2023-08-24 02:38:01,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:38:01,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:38:01,477 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:38:01,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 02:38:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-24 02:38:01,683 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 02:38:01,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:38:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 95359142, now seen corresponding path program 37 times [2023-08-24 02:38:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:38:01,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621081001] [2023-08-24 02:38:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:38:01,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:38:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:38:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:38:01,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:38:01,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621081001] [2023-08-24 02:38:01,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621081001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:38:01,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495792370] [2023-08-24 02:38:01,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:38:01,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:38:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:38:01,803 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) [2023-08-24 02:38:01,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 02:38:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:38:01,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 02:38:01,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:38:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:38:01,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:38:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:38:02,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495792370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:38:02,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:38:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-08-24 02:38:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48329023] [2023-08-24 02:38:02,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:38:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:38:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:38:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:38:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:38:02,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 130 [2023-08-24 02:38:02,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 6462 transitions, 259540 flow. Second operand has 20 states, 20 states have (on average 52.75) internal successors, (1055), 20 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:38:02,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:38:02,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 130 [2023-08-24 02:38:02,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 02:38:55,107 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 [2023-08-24 02:38:55,107 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 [2023-08-24 02:38:55,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 02:38:55,650 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 02:38:55,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 02:38:55,851 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,SelfDestructingSolverStorable43 [2023-08-24 02:38:55,851 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 385506 conditions, 23696 events (13288/23695 cut-off events. For 1409390/1409390 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 226461 event pairs, 757 based on Foata normal form. 22/25575 useless extension candidates. Maximal degree in co-relation 383355. Up to 11145 conditions per place.). [2023-08-24 02:38:55,852 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 02:38:55,853 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 02:38:55,853 INFO L445 BasicCegarLoop]: Path program histogram: [37, 6, 1] [2023-08-24 02:38:55,855 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 02:38:55,855 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 02:38:55,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:38:55 BasicIcfg [2023-08-24 02:38:55,857 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 02:38:55,857 INFO L158 Benchmark]: Toolchain (without parser) took 831824.64ms. Allocated memory was 367.0MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 343.2MB in the beginning and 5.0GB in the end (delta: -4.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-24 02:38:55,857 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 367.0MB. Free memory is still 344.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:38:55,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.58ms. Allocated memory is still 367.0MB. Free memory was 343.2MB in the beginning and 332.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 02:38:55,858 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.42ms. Allocated memory is still 367.0MB. Free memory was 332.3MB in the beginning and 331.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:38:55,858 INFO L158 Benchmark]: Boogie Preprocessor took 23.98ms. Allocated memory is still 367.0MB. Free memory was 330.6MB in the beginning and 329.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:38:55,858 INFO L158 Benchmark]: RCFGBuilder took 325.27ms. Allocated memory is still 367.0MB. Free memory was 329.6MB in the beginning and 315.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 02:38:55,858 INFO L158 Benchmark]: TraceAbstraction took 831213.39ms. Allocated memory was 367.0MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 314.9MB in the beginning and 5.0GB in the end (delta: -4.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-24 02:38:55,859 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 367.0MB. Free memory is still 344.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 226.58ms. Allocated memory is still 367.0MB. Free memory was 343.2MB in the beginning and 332.3MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.42ms. Allocated memory is still 367.0MB. Free memory was 332.3MB in the beginning and 331.1MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.98ms. Allocated memory is still 367.0MB. Free memory was 330.6MB in the beginning and 329.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 325.27ms. Allocated memory is still 367.0MB. Free memory was 329.6MB in the beginning and 315.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 831213.39ms. Allocated memory was 367.0MB in the beginning and 8.3GB in the end (delta: 8.0GB). Free memory was 314.9MB in the beginning and 5.0GB in the end (delta: -4.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 67 PlacesBefore, 20 PlacesAfterwards, 65 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 55 TotalNumberOfCompositions, 591 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 581, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 310, independent: 308, independent conditional: 0, independent unconditional: 308, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 581, independent: 270, independent conditional: 0, independent unconditional: 270, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 310, unknown conditional: 0, unknown unconditional: 310] , 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: 73]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 385506 conditions, 23696 events (13288/23695 cut-off events. For 1409390/1409390 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 226461 event pairs, 757 based on Foata normal form. 22/25575 useless extension candidates. Maximal degree in co-relation 383355. Up to 11145 conditions per place.). - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 385506 conditions, 23696 events (13288/23695 cut-off events. For 1409390/1409390 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 226461 event pairs, 757 based on Foata normal form. 22/25575 useless extension candidates. Maximal degree in co-relation 383355. Up to 11145 conditions per place.). - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 51/130 universal loopers) in iteration 44,while PetriNetUnfolder was constructing finite prefix that currently has 385506 conditions, 23696 events (13288/23695 cut-off events. For 1409390/1409390 co-relation queries the response was YES. Maximal size of possible extension queue 2347. Compared 226461 event pairs, 757 based on Foata normal form. 22/25575 useless extension candidates. Maximal degree in co-relation 383355. Up to 11145 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 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: 831.1s, OverallIterations: 44, TraceHistogramMax: 5, PathProgramHistogramMax: 37, EmptinessCheckTime: 0.0s, AutomataDifference: 808.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2092 SdHoareTripleChecker+Valid, 6.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2092 mSDsluCounter, 505 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 336 mSDsCounter, 305 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13431 IncrementalHoareTripleChecker+Invalid, 13736 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 305 mSolverCounterUnsat, 169 mSDtfsCounter, 13431 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2296 GetRequests, 1028 SyntacticMatches, 210 SemanticMatches, 1058 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259540occurred in iteration=43, InterpolantAutomatonStates: 915, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1511 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 137 NumberOfCheckSat, 2115 ConstructedInterpolants, 0 QuantifiedInterpolants, 6911 SizeOfPredicates, 36 NumberOfNonLiveVariables, 5332 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 124 InterpolantComputations, 4 PerfectInterpolantSequences, 428/1281 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