/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:51:06,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:51:06,310 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 09:51:06,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:51:06,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:51:06,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:51:06,337 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:51:06,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:51:06,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:51:06,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:51:06,339 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:51:06,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:51:06,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:51:06,340 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:51:06,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:51:06,345 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:51:06,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:51:06,346 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:51:06,346 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:51:06,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:51:06,347 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:51:06,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:51:06,350 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:51:06,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:51:06,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:51:06,351 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:51:06,351 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:51:06,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:51:06,352 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:51:06,352 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:51:06,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:51:06,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:51:06,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:51:06,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:51:06,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:51:06,357 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:51:06,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:51:06,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:51:06,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:51:06,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:51:06,734 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:51:06,735 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 09:51:07,913 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:51:08,128 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:51:08,128 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 09:51:08,134 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49d813dec/8faaed8f6ba74162b2bb201485626ab1/FLAG413fd34ed [2023-08-24 09:51:08,144 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49d813dec/8faaed8f6ba74162b2bb201485626ab1 [2023-08-24 09:51:08,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:51:08,147 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:51:08,148 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:51:08,149 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:51:08,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:51:08,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,152 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261ddf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08, skipping insertion in model container [2023-08-24 09:51:08,152 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,168 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:51:08,308 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-24 09:51:08,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:51:08,316 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:51:08,332 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-24 09:51:08,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:51:08,339 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:51:08,339 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:51:08,353 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:51:08,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08 WrapperNode [2023-08-24 09:51:08,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:51:08,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:51:08,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:51:08,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:51:08,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,369 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,389 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-24 09:51:08,389 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:51:08,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:51:08,390 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:51:08,390 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:51:08,397 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:51:08,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:51:08,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:51:08,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:51:08,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (1/1) ... [2023-08-24 09:51:08,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:51:08,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:08,455 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 09:51:08,478 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 09:51:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:51:08,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:51:08,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:51:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:51:08,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:51:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:51:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:51:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:51:08,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:51:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:51:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:51:08,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:51:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:51:08,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:51:08,493 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 09:51:08,595 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:51:08,597 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:51:08,782 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:51:08,810 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:51:08,811 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 09:51:08,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:51:08 BoogieIcfgContainer [2023-08-24 09:51:08,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:51:08,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:51:08,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:51:08,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:51:08,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:51:08" (1/3) ... [2023-08-24 09:51:08,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147f084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:51:08, skipping insertion in model container [2023-08-24 09:51:08,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:51:08" (2/3) ... [2023-08-24 09:51:08,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147f084b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:51:08, skipping insertion in model container [2023-08-24 09:51:08,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:51:08" (3/3) ... [2023-08-24 09:51:08,819 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 09:51:08,834 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:51:08,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:51:08,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:51:08,879 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 09:51:08,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-08-24 09:51:08,955 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-08-24 09:51:08,956 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:51:08,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 09:51:08,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-08-24 09:51:08,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-08-24 09:51:08,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:51:08,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-24 09:51:08,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-24 09:51:08,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-08-24 09:51:09,016 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-24 09:51:09,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:51:09,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 09:51:09,019 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-08-24 09:51:11,178 INFO L134 LiptonReduction]: Checked pairs total: 494 [2023-08-24 09:51:11,179 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-24 09:51:11,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:51:11,212 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;@3bbb020f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:51:11,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 09:51:11,217 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:51:11,217 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 09:51:11,217 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:51:11,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:11,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:11,218 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 09:51:11,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1659386574, now seen corresponding path program 1 times [2023-08-24 09:51:11,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40526743] [2023-08-24 09:51:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:11,756 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 09:51:11,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:11,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40526743] [2023-08-24 09:51:11,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40526743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:51:11,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:51:11,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 09:51:11,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775169473] [2023-08-24 09:51:11,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:51:11,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:51:11,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:51:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:51:11,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:11,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:11,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:11,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:11,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:11,842 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-08-24 09:51:11,842 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 09:51:11,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 243 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-24 09:51:11,844 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-24 09:51:11,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-24 09:51:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:51:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:51:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-24 09:51:11,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126712328767123 [2023-08-24 09:51:11,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-24 09:51:11,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-24 09:51:11,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:11,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-24 09:51:11,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:11,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:11,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:11,873 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 241 transitions. [2023-08-24 09:51:11,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-24 09:51:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 09:51:11,877 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-24 09:51:11,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-24 09:51:11,883 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-24 09:51:11,884 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-24 09:51:11,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:11,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:11,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:51:11,885 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 09:51:11,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -505495899, now seen corresponding path program 1 times [2023-08-24 09:51:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811397487] [2023-08-24 09:51:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:12,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811397487] [2023-08-24 09:51:12,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811397487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:12,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482689541] [2023-08-24 09:51:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:12,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:12,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:12,049 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 09:51:12,074 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 09:51:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:12,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 09:51:12,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:12,193 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 09:51:12,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:12,247 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 09:51:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482689541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:12,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:12,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-24 09:51:12,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192550213] [2023-08-24 09:51:12,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 09:51:12,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 09:51:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-24 09:51:12,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 146 [2023-08-24 09:51:12,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 7 states, 7 states have (on average 66.14285714285714) internal successors, (463), 7 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:12,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:12,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 146 [2023-08-24 09:51:12,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:12,366 INFO L124 PetriNetUnfolderBase]: 73/133 cut-off events. [2023-08-24 09:51:12,367 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-24 09:51:12,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 133 events. 73/133 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 367 event pairs, 15 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 75. Up to 79 conditions per place. [2023-08-24 09:51:12,369 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 25 selfloop transitions, 7 changer transitions 9/42 dead transitions. [2023-08-24 09:51:12,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 197 flow [2023-08-24 09:51:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:51:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:51:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 420 transitions. [2023-08-24 09:51:12,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794520547945205 [2023-08-24 09:51:12,378 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 420 transitions. [2023-08-24 09:51:12,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 420 transitions. [2023-08-24 09:51:12,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:12,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 420 transitions. [2023-08-24 09:51:12,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:12,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:12,391 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:12,391 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 6 states and 420 transitions. [2023-08-24 09:51:12,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 197 flow [2023-08-24 09:51:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 187 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 09:51:12,393 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 98 flow [2023-08-24 09:51:12,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 09:51:12,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 09:51:12,394 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 98 flow [2023-08-24 09:51:12,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.14285714285714) internal successors, (463), 7 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:12,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:12,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:12,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 09:51:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:12,601 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 09:51:12,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash -783701409, now seen corresponding path program 1 times [2023-08-24 09:51:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:12,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110892252] [2023-08-24 09:51:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:12,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:12,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110892252] [2023-08-24 09:51:12,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110892252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:12,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825148966] [2023-08-24 09:51:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:12,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:12,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:12,810 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 09:51:12,838 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 09:51:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:12,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 09:51:12,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:13,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:13,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825148966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:13,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:13,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 09:51:13,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630915738] [2023-08-24 09:51:13,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:13,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:51:13,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:13,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:51:13,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:51:13,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:13,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 98 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:13,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:13,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:13,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:13,767 INFO L124 PetriNetUnfolderBase]: 162/304 cut-off events. [2023-08-24 09:51:13,767 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2023-08-24 09:51:13,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 304 events. 162/304 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1128 event pairs, 15 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 531. Up to 101 conditions per place. [2023-08-24 09:51:13,770 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 45 selfloop transitions, 25 changer transitions 41/111 dead transitions. [2023-08-24 09:51:13,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 111 transitions, 619 flow [2023-08-24 09:51:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:51:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:51:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1041 transitions. [2023-08-24 09:51:13,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41941982272361 [2023-08-24 09:51:13,774 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1041 transitions. [2023-08-24 09:51:13,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1041 transitions. [2023-08-24 09:51:13,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:13,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1041 transitions. [2023-08-24 09:51:13,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.23529411764706) internal successors, (1041), 17 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:13,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 146.0) internal successors, (2628), 18 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:13,781 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 146.0) internal successors, (2628), 18 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:13,781 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 98 flow. Second operand 17 states and 1041 transitions. [2023-08-24 09:51:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 111 transitions, 619 flow [2023-08-24 09:51:13,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 111 transitions, 603 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 09:51:13,786 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 289 flow [2023-08-24 09:51:13,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=289, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-24 09:51:13,787 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-24 09:51:13,787 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 289 flow [2023-08-24 09:51:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:13,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:13,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:13,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 09:51:13,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-24 09:51:13,994 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 09:51:13,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash -760798655, now seen corresponding path program 2 times [2023-08-24 09:51:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:13,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130898218] [2023-08-24 09:51:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:14,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:14,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130898218] [2023-08-24 09:51:14,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130898218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:14,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121812594] [2023-08-24 09:51:14,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:51:14,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:14,202 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 09:51:14,224 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 09:51:14,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:14,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:51:14,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:14,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:15,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121812594] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:15,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:15,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 09:51:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659852436] [2023-08-24 09:51:15,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:51:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:51:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:51:15,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 289 flow. Second operand has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:15,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:15,672 INFO L124 PetriNetUnfolderBase]: 176/354 cut-off events. [2023-08-24 09:51:15,673 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2023-08-24 09:51:15,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 354 events. 176/354 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1463 event pairs, 14 based on Foata normal form. 2/356 useless extension candidates. Maximal degree in co-relation 1495. Up to 144 conditions per place. [2023-08-24 09:51:15,676 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 62 selfloop transitions, 31 changer transitions 27/120 dead transitions. [2023-08-24 09:51:15,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 120 transitions, 948 flow [2023-08-24 09:51:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 09:51:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 09:51:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 981 transitions. [2023-08-24 09:51:15,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199486301369863 [2023-08-24 09:51:15,680 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 981 transitions. [2023-08-24 09:51:15,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 981 transitions. [2023-08-24 09:51:15,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:15,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 981 transitions. [2023-08-24 09:51:15,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.3125) internal successors, (981), 16 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:15,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:15,686 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:15,686 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 289 flow. Second operand 16 states and 981 transitions. [2023-08-24 09:51:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 120 transitions, 948 flow [2023-08-24 09:51:15,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 120 transitions, 870 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-08-24 09:51:15,693 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 445 flow [2023-08-24 09:51:15,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-24 09:51:15,694 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-08-24 09:51:15,694 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 445 flow [2023-08-24 09:51:15,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:15,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:15,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:15,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 09:51:15,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:15,901 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 09:51:15,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:15,901 INFO L85 PathProgramCache]: Analyzing trace with hash 310086467, now seen corresponding path program 3 times [2023-08-24 09:51:15,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:15,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827033985] [2023-08-24 09:51:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:15,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:16,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827033985] [2023-08-24 09:51:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827033985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321407042] [2023-08-24 09:51:16,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:51:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:16,153 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 09:51:16,177 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 09:51:16,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:51:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:16,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:51:16,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:16,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:16,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321407042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:16,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:16,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 09:51:16,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33201143] [2023-08-24 09:51:16,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:51:16,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:16,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:51:16,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:51:16,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:16,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 445 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:16,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:16,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:16,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:17,885 INFO L124 PetriNetUnfolderBase]: 180/370 cut-off events. [2023-08-24 09:51:17,885 INFO L125 PetriNetUnfolderBase]: For 1463/1463 co-relation queries the response was YES. [2023-08-24 09:51:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 370 events. 180/370 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1548 event pairs, 16 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1696. Up to 147 conditions per place. [2023-08-24 09:51:17,889 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 68 selfloop transitions, 39 changer transitions 30/137 dead transitions. [2023-08-24 09:51:17,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 137 transitions, 1165 flow [2023-08-24 09:51:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:51:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:51:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1218 transitions. [2023-08-24 09:51:17,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41712328767123286 [2023-08-24 09:51:17,893 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1218 transitions. [2023-08-24 09:51:17,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1218 transitions. [2023-08-24 09:51:17,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:17,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1218 transitions. [2023-08-24 09:51:17,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:17,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 146.0) internal successors, (3066), 21 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:17,900 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 146.0) internal successors, (3066), 21 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:17,900 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 445 flow. Second operand 20 states and 1218 transitions. [2023-08-24 09:51:17,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 137 transitions, 1165 flow [2023-08-24 09:51:17,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1046 flow, removed 35 selfloop flow, removed 8 redundant places. [2023-08-24 09:51:17,913 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 563 flow [2023-08-24 09:51:17,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=563, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-08-24 09:51:17,915 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-08-24 09:51:17,915 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 563 flow [2023-08-24 09:51:17,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:17,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:17,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:17,924 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 09:51:18,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:18,122 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 09:51:18,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1295742093, now seen corresponding path program 4 times [2023-08-24 09:51:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:18,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650893977] [2023-08-24 09:51:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:18,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:18,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:18,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650893977] [2023-08-24 09:51:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650893977] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541404381] [2023-08-24 09:51:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:51:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:18,335 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 09:51:18,338 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 09:51:18,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:51:18,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:18,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:51:18,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:18,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541404381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:18,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 09:51:18,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302197296] [2023-08-24 09:51:18,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:51:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:51:18,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:51:18,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:18,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 563 flow. Second operand has 21 states, 21 states have (on average 56.80952380952381) internal successors, (1193), 21 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:18,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:18,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:18,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:19,328 INFO L124 PetriNetUnfolderBase]: 216/426 cut-off events. [2023-08-24 09:51:19,328 INFO L125 PetriNetUnfolderBase]: For 2038/2038 co-relation queries the response was YES. [2023-08-24 09:51:19,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 426 events. 216/426 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1787 event pairs, 31 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 2123. Up to 301 conditions per place. [2023-08-24 09:51:19,332 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 72 selfloop transitions, 22 changer transitions 24/118 dead transitions. [2023-08-24 09:51:19,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1121 flow [2023-08-24 09:51:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:51:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:51:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 905 transitions. [2023-08-24 09:51:19,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132420091324201 [2023-08-24 09:51:19,336 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 905 transitions. [2023-08-24 09:51:19,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 905 transitions. [2023-08-24 09:51:19,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:19,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 905 transitions. [2023-08-24 09:51:19,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.333333333333336) internal successors, (905), 15 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 09:51:19,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:19,342 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:19,342 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 563 flow. Second operand 15 states and 905 transitions. [2023-08-24 09:51:19,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1121 flow [2023-08-24 09:51:19,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1011 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 09:51:19,353 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 661 flow [2023-08-24 09:51:19,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=661, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2023-08-24 09:51:19,355 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-24 09:51:19,355 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 661 flow [2023-08-24 09:51:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.80952380952381) internal successors, (1193), 21 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:19,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:19,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:19,367 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 09:51:19,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:19,568 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 09:51:19,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1393729767, now seen corresponding path program 5 times [2023-08-24 09:51:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:19,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042638244] [2023-08-24 09:51:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:19,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042638244] [2023-08-24 09:51:19,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042638244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:19,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905726827] [2023-08-24 09:51:19,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:51:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:19,775 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 09:51:19,797 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 09:51:19,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:19,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 09:51:19,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:19,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:20,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905726827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:20,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:51:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337128781] [2023-08-24 09:51:20,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:20,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:51:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:51:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:51:20,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:20,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 661 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:20,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:20,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:20,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:21,050 INFO L124 PetriNetUnfolderBase]: 286/567 cut-off events. [2023-08-24 09:51:21,050 INFO L125 PetriNetUnfolderBase]: For 3754/3754 co-relation queries the response was YES. [2023-08-24 09:51:21,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2936 conditions, 567 events. 286/567 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2661 event pairs, 23 based on Foata normal form. 4/571 useless extension candidates. Maximal degree in co-relation 2871. Up to 211 conditions per place. [2023-08-24 09:51:21,089 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 102 selfloop transitions, 59 changer transitions 18/179 dead transitions. [2023-08-24 09:51:21,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 179 transitions, 1691 flow [2023-08-24 09:51:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:51:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:51:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1742 transitions. [2023-08-24 09:51:21,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41143127066603685 [2023-08-24 09:51:21,095 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1742 transitions. [2023-08-24 09:51:21,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1742 transitions. [2023-08-24 09:51:21,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:21,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1742 transitions. [2023-08-24 09:51:21,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.06896551724138) internal successors, (1742), 29 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:21,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:21,106 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:21,106 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 661 flow. Second operand 29 states and 1742 transitions. [2023-08-24 09:51:21,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 179 transitions, 1691 flow [2023-08-24 09:51:21,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 1600 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-24 09:51:21,128 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 1000 flow [2023-08-24 09:51:21,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1000, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2023-08-24 09:51:21,128 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 09:51:21,129 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 1000 flow [2023-08-24 09:51:21,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:21,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:21,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:21,139 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 09:51:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:21,335 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 09:51:21,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1954626653, now seen corresponding path program 6 times [2023-08-24 09:51:21,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:21,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376934116] [2023-08-24 09:51:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:21,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:21,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376934116] [2023-08-24 09:51:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376934116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531585687] [2023-08-24 09:51:21,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:51:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:21,530 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 09:51:21,549 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 09:51:21,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:51:21,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:21,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:51:21,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:21,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:22,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531585687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:22,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:22,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 09:51:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827616149] [2023-08-24 09:51:22,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:22,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:51:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:51:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:51:22,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:22,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 1000 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:22,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:22,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:22,759 INFO L124 PetriNetUnfolderBase]: 277/548 cut-off events. [2023-08-24 09:51:22,759 INFO L125 PetriNetUnfolderBase]: For 4992/4992 co-relation queries the response was YES. [2023-08-24 09:51:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3303 conditions, 548 events. 277/548 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2527 event pairs, 30 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 3205. Up to 465 conditions per place. [2023-08-24 09:51:22,764 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 94 selfloop transitions, 26 changer transitions 9/129 dead transitions. [2023-08-24 09:51:22,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 129 transitions, 1513 flow [2023-08-24 09:51:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 09:51:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 09:51:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 774 transitions. [2023-08-24 09:51:22,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077976817702845 [2023-08-24 09:51:22,766 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 774 transitions. [2023-08-24 09:51:22,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 774 transitions. [2023-08-24 09:51:22,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:22,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 774 transitions. [2023-08-24 09:51:22,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.53846153846154) internal successors, (774), 13 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:22,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:22,771 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:22,771 INFO L175 Difference]: Start difference. First operand has 116 places, 92 transitions, 1000 flow. Second operand 13 states and 774 transitions. [2023-08-24 09:51:22,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 129 transitions, 1513 flow [2023-08-24 09:51:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 1230 flow, removed 100 selfloop flow, removed 21 redundant places. [2023-08-24 09:51:22,792 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 893 flow [2023-08-24 09:51:22,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=893, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-08-24 09:51:22,792 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2023-08-24 09:51:22,793 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 893 flow [2023-08-24 09:51:22,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:22,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:22,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:22,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 09:51:22,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:22,999 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 09:51:22,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605607, now seen corresponding path program 7 times [2023-08-24 09:51:23,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:23,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694755985] [2023-08-24 09:51:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:23,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694755985] [2023-08-24 09:51:23,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694755985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:23,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142291027] [2023-08-24 09:51:23,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:51:23,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:23,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:23,199 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 09:51:23,220 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 09:51:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:23,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 09:51:23,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:23,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:23,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142291027] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:23,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:51:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039167354] [2023-08-24 09:51:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:23,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:51:23,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:51:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:51:23,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:23,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 893 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:23,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:23,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:23,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:24,399 INFO L124 PetriNetUnfolderBase]: 332/634 cut-off events. [2023-08-24 09:51:24,399 INFO L125 PetriNetUnfolderBase]: For 5273/5273 co-relation queries the response was YES. [2023-08-24 09:51:24,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 634 events. 332/634 cut-off events. For 5273/5273 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2968 event pairs, 21 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 3535. Up to 379 conditions per place. [2023-08-24 09:51:24,405 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 117 selfloop transitions, 35 changer transitions 54/206 dead transitions. [2023-08-24 09:51:24,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 206 transitions, 2090 flow [2023-08-24 09:51:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 09:51:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 09:51:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1852 transitions. [2023-08-24 09:51:24,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091913389306231 [2023-08-24 09:51:24,410 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1852 transitions. [2023-08-24 09:51:24,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1852 transitions. [2023-08-24 09:51:24,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:24,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1852 transitions. [2023-08-24 09:51:24,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 59.74193548387097) internal successors, (1852), 31 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:24,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 146.0) internal successors, (4672), 32 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:24,423 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 146.0) internal successors, (4672), 32 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:24,424 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 893 flow. Second operand 31 states and 1852 transitions. [2023-08-24 09:51:24,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 206 transitions, 2090 flow [2023-08-24 09:51:24,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 206 transitions, 1990 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-24 09:51:24,447 INFO L231 Difference]: Finished difference. Result has 135 places, 107 transitions, 1035 flow [2023-08-24 09:51:24,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1035, PETRI_PLACES=135, PETRI_TRANSITIONS=107} [2023-08-24 09:51:24,448 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2023-08-24 09:51:24,449 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 1035 flow [2023-08-24 09:51:24,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:24,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:24,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:24,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 09:51:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 09:51:24,656 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 09:51:24,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1799859289, now seen corresponding path program 8 times [2023-08-24 09:51:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664367185] [2023-08-24 09:51:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:24,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:24,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664367185] [2023-08-24 09:51:24,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664367185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179054159] [2023-08-24 09:51:24,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:51:24,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:24,833 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 09:51:24,856 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 09:51:24,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:24,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:24,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:51:24,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:25,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179054159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:25,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 09:51:25,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644876001] [2023-08-24 09:51:25,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:25,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:51:25,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:51:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:51:25,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:25,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:25,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:25,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:25,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:25,911 INFO L124 PetriNetUnfolderBase]: 279/537 cut-off events. [2023-08-24 09:51:25,911 INFO L125 PetriNetUnfolderBase]: For 6487/6487 co-relation queries the response was YES. [2023-08-24 09:51:25,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 537 events. 279/537 cut-off events. For 6487/6487 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2375 event pairs, 22 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 3170. Up to 446 conditions per place. [2023-08-24 09:51:25,917 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 108 selfloop transitions, 31 changer transitions 5/144 dead transitions. [2023-08-24 09:51:25,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 144 transitions, 1602 flow [2023-08-24 09:51:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 09:51:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 09:51:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 831 transitions. [2023-08-24 09:51:25,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40655577299412915 [2023-08-24 09:51:25,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 831 transitions. [2023-08-24 09:51:25,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 831 transitions. [2023-08-24 09:51:25,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:25,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 831 transitions. [2023-08-24 09:51:25,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.357142857142854) internal successors, (831), 14 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:25,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:25,924 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:25,924 INFO L175 Difference]: Start difference. First operand has 135 places, 107 transitions, 1035 flow. Second operand 14 states and 831 transitions. [2023-08-24 09:51:25,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 144 transitions, 1602 flow [2023-08-24 09:51:25,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1316 flow, removed 97 selfloop flow, removed 23 redundant places. [2023-08-24 09:51:25,942 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 958 flow [2023-08-24 09:51:25,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=958, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2023-08-24 09:51:25,943 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 09:51:25,943 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 958 flow [2023-08-24 09:51:25,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:25,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:25,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:25,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 09:51:26,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 09:51:26,149 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 09:51:26,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1814966209, now seen corresponding path program 9 times [2023-08-24 09:51:26,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:26,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022424752] [2023-08-24 09:51:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:26,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:26,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022424752] [2023-08-24 09:51:26,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022424752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:26,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368652613] [2023-08-24 09:51:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:51:26,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:26,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:26,327 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 09:51:26,330 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 09:51:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:51:26,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:26,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 09:51:26,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:26,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:26,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368652613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:26,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:26,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 09:51:26,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564490662] [2023-08-24 09:51:26,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:26,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 09:51:26,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:26,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 09:51:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 09:51:26,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:26,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 958 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:26,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:26,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:26,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:27,442 INFO L124 PetriNetUnfolderBase]: 287/560 cut-off events. [2023-08-24 09:51:27,443 INFO L125 PetriNetUnfolderBase]: For 5481/5481 co-relation queries the response was YES. [2023-08-24 09:51:27,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 560 events. 287/560 cut-off events. For 5481/5481 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2532 event pairs, 19 based on Foata normal form. 4/562 useless extension candidates. Maximal degree in co-relation 3069. Up to 374 conditions per place. [2023-08-24 09:51:27,450 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 118 selfloop transitions, 35 changer transitions 17/170 dead transitions. [2023-08-24 09:51:27,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 170 transitions, 1686 flow [2023-08-24 09:51:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 09:51:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 09:51:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1428 transitions. [2023-08-24 09:51:27,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075342465753425 [2023-08-24 09:51:27,457 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1428 transitions. [2023-08-24 09:51:27,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1428 transitions. [2023-08-24 09:51:27,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:27,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1428 transitions. [2023-08-24 09:51:27,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 59.5) internal successors, (1428), 24 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:27,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:27,464 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:27,464 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 958 flow. Second operand 24 states and 1428 transitions. [2023-08-24 09:51:27,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 170 transitions, 1686 flow [2023-08-24 09:51:27,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1599 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-24 09:51:27,479 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 979 flow [2023-08-24 09:51:27,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=979, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2023-08-24 09:51:27,479 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 09:51:27,480 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 979 flow [2023-08-24 09:51:27,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:27,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:27,493 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:27,500 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 09:51:27,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 09:51:27,699 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 09:51:27,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash -647147395, now seen corresponding path program 10 times [2023-08-24 09:51:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298673693] [2023-08-24 09:51:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:27,882 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 09:51:27,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298673693] [2023-08-24 09:51:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298673693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:27,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080792900] [2023-08-24 09:51:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:51:27,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:27,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:27,884 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 09:51:27,886 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 09:51:27,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:51:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:27,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:51:27,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:28,078 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 09:51:28,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:28,289 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 09:51:28,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080792900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:28,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:28,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 09:51:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084607636] [2023-08-24 09:51:28,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:28,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:51:28,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:51:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:51:28,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:28,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 979 flow. Second operand has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:28,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:28,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:28,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:28,850 INFO L124 PetriNetUnfolderBase]: 341/659 cut-off events. [2023-08-24 09:51:28,850 INFO L125 PetriNetUnfolderBase]: For 7715/7715 co-relation queries the response was YES. [2023-08-24 09:51:28,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4046 conditions, 659 events. 341/659 cut-off events. For 7715/7715 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3128 event pairs, 11 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 3956. Up to 345 conditions per place. [2023-08-24 09:51:28,856 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 82 selfloop transitions, 73 changer transitions 44/199 dead transitions. [2023-08-24 09:51:28,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 199 transitions, 2051 flow [2023-08-24 09:51:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 09:51:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 09:51:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1446 transitions. [2023-08-24 09:51:28,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126712328767123 [2023-08-24 09:51:28,869 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1446 transitions. [2023-08-24 09:51:28,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1446 transitions. [2023-08-24 09:51:28,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:28,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1446 transitions. [2023-08-24 09:51:28,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.25) internal successors, (1446), 24 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:28,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:28,880 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:28,880 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 979 flow. Second operand 24 states and 1446 transitions. [2023-08-24 09:51:28,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 199 transitions, 2051 flow [2023-08-24 09:51:28,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 199 transitions, 1973 flow, removed 9 selfloop flow, removed 17 redundant places. [2023-08-24 09:51:28,908 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 1218 flow [2023-08-24 09:51:28,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1218, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2023-08-24 09:51:28,909 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-08-24 09:51:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 1218 flow [2023-08-24 09:51:28,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:28,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:28,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:28,914 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 09:51:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 09:51:29,110 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 09:51:29,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1246269631, now seen corresponding path program 11 times [2023-08-24 09:51:29,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:29,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659786520] [2023-08-24 09:51:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:29,396 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 09:51:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659786520] [2023-08-24 09:51:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659786520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628194015] [2023-08-24 09:51:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:51:29,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:29,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:29,398 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 09:51:29,459 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 09:51:29,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:51:29,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:29,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:51:29,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:29,638 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 09:51:29,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:29,863 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 09:51:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628194015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:29,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:29,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-08-24 09:51:29,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921090865] [2023-08-24 09:51:29,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:29,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:51:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:29,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:51:29,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 09:51:29,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 146 [2023-08-24 09:51:29,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 1218 flow. Second operand has 24 states, 24 states have (on average 51.791666666666664) internal successors, (1243), 24 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:29,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:29,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 146 [2023-08-24 09:51:29,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:30,660 INFO L124 PetriNetUnfolderBase]: 335/668 cut-off events. [2023-08-24 09:51:30,661 INFO L125 PetriNetUnfolderBase]: For 11877/11877 co-relation queries the response was YES. [2023-08-24 09:51:30,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 668 events. 335/668 cut-off events. For 11877/11877 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3263 event pairs, 15 based on Foata normal form. 4/672 useless extension candidates. Maximal degree in co-relation 4400. Up to 357 conditions per place. [2023-08-24 09:51:30,667 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 102 selfloop transitions, 90 changer transitions 22/214 dead transitions. [2023-08-24 09:51:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 2379 flow [2023-08-24 09:51:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:51:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:51:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1538 transitions. [2023-08-24 09:51:30,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37622309197651665 [2023-08-24 09:51:30,670 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1538 transitions. [2023-08-24 09:51:30,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1538 transitions. [2023-08-24 09:51:30,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:30,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1538 transitions. [2023-08-24 09:51:30,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.92857142857143) internal successors, (1538), 28 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:30,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:30,678 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:30,678 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 1218 flow. Second operand 28 states and 1538 transitions. [2023-08-24 09:51:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 2379 flow [2023-08-24 09:51:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 214 transitions, 1977 flow, removed 130 selfloop flow, removed 19 redundant places. [2023-08-24 09:51:30,706 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 1478 flow [2023-08-24 09:51:30,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1478, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2023-08-24 09:51:30,707 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-08-24 09:51:30,707 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 1478 flow [2023-08-24 09:51:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 51.791666666666664) internal successors, (1243), 24 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:30,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:30,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:30,717 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 09:51:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 09:51:30,917 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 09:51:30,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1231162711, now seen corresponding path program 12 times [2023-08-24 09:51:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:30,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406682150] [2023-08-24 09:51:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:31,101 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 09:51:31,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:31,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406682150] [2023-08-24 09:51:31,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406682150] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:31,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493855313] [2023-08-24 09:51:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:51:31,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:31,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:31,102 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 09:51:31,105 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 09:51:31,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:51:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:31,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:31,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:31,359 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 09:51:31,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:31,793 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 09:51:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493855313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:31,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:31,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002987931] [2023-08-24 09:51:31,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:31,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:31,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:31,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:31,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:31,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:31,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 1478 flow. Second operand has 25 states, 25 states have (on average 56.84) internal successors, (1421), 25 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:31,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:31,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:31,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:33,634 INFO L124 PetriNetUnfolderBase]: 490/948 cut-off events. [2023-08-24 09:51:33,635 INFO L125 PetriNetUnfolderBase]: For 14190/14190 co-relation queries the response was YES. [2023-08-24 09:51:33,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 948 events. 490/948 cut-off events. For 14190/14190 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4949 event pairs, 34 based on Foata normal form. 3/951 useless extension candidates. Maximal degree in co-relation 6165. Up to 411 conditions per place. [2023-08-24 09:51:33,645 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 127 selfloop transitions, 133 changer transitions 30/290 dead transitions. [2023-08-24 09:51:33,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3353 flow [2023-08-24 09:51:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 09:51:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 09:51:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1992 transitions. [2023-08-24 09:51:33,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41344956413449563 [2023-08-24 09:51:33,649 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1992 transitions. [2023-08-24 09:51:33,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1992 transitions. [2023-08-24 09:51:33,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:33,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1992 transitions. [2023-08-24 09:51:33,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.36363636363637) internal successors, (1992), 33 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:33,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 146.0) internal successors, (4964), 34 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:33,658 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 146.0) internal successors, (4964), 34 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:33,658 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 1478 flow. Second operand 33 states and 1992 transitions. [2023-08-24 09:51:33,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3353 flow [2023-08-24 09:51:33,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 290 transitions, 2953 flow, removed 130 selfloop flow, removed 15 redundant places. [2023-08-24 09:51:33,697 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2263 flow [2023-08-24 09:51:33,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2263, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2023-08-24 09:51:33,699 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-08-24 09:51:33,699 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2263 flow [2023-08-24 09:51:33,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.84) internal successors, (1421), 25 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:33,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:33,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:33,711 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 09:51:33,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 09:51:33,905 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:51:33,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2063042039, now seen corresponding path program 13 times [2023-08-24 09:51:33,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:33,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247643612] [2023-08-24 09:51:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:34,085 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 09:51:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:34,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247643612] [2023-08-24 09:51:34,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247643612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128317441] [2023-08-24 09:51:34,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:51:34,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:34,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:34,089 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 09:51:34,093 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 09:51:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:34,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:51:34,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:34,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:34,477 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 09:51:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128317441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:34,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:34,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 09:51:34,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374375290] [2023-08-24 09:51:34,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:34,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:51:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:51:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:51:34,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:34,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2263 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:34,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:34,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:35,504 INFO L124 PetriNetUnfolderBase]: 601/1140 cut-off events. [2023-08-24 09:51:35,504 INFO L125 PetriNetUnfolderBase]: For 15836/15836 co-relation queries the response was YES. [2023-08-24 09:51:35,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1140 events. 601/1140 cut-off events. For 15836/15836 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6210 event pairs, 15 based on Foata normal form. 7/1147 useless extension candidates. Maximal degree in co-relation 7723. Up to 313 conditions per place. [2023-08-24 09:51:35,513 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 123 selfloop transitions, 130 changer transitions 87/340 dead transitions. [2023-08-24 09:51:35,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 4456 flow [2023-08-24 09:51:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 09:51:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 09:51:35,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2322 transitions. [2023-08-24 09:51:35,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077976817702845 [2023-08-24 09:51:35,517 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2322 transitions. [2023-08-24 09:51:35,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2322 transitions. [2023-08-24 09:51:35,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:35,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2322 transitions. [2023-08-24 09:51:35,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 59.53846153846154) internal successors, (2322), 39 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:35,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 146.0) internal successors, (5840), 40 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:35,527 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 146.0) internal successors, (5840), 40 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:35,527 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2263 flow. Second operand 39 states and 2322 transitions. [2023-08-24 09:51:35,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 4456 flow [2023-08-24 09:51:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 340 transitions, 3744 flow, removed 244 selfloop flow, removed 18 redundant places. [2023-08-24 09:51:35,574 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 1961 flow [2023-08-24 09:51:35,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1961, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2023-08-24 09:51:35,575 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 09:51:35,575 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 1961 flow [2023-08-24 09:51:35,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:35,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:35,575 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:35,581 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 09:51:35,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:35,776 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 09:51:35,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:35,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1295557833, now seen corresponding path program 14 times [2023-08-24 09:51:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239553265] [2023-08-24 09:51:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:35,953 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 09:51:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239553265] [2023-08-24 09:51:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239553265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708767141] [2023-08-24 09:51:35,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:51:35,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:35,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:35,955 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 09:51:35,969 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 09:51:36,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:36,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:36,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:36,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:36,251 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 09:51:36,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:36,611 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 09:51:36,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708767141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:36,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:36,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300858884] [2023-08-24 09:51:36,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:36,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:36,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 1961 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:36,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:36,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:38,197 INFO L124 PetriNetUnfolderBase]: 580/1124 cut-off events. [2023-08-24 09:51:38,197 INFO L125 PetriNetUnfolderBase]: For 20237/20237 co-relation queries the response was YES. [2023-08-24 09:51:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 1124 events. 580/1124 cut-off events. For 20237/20237 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6176 event pairs, 22 based on Foata normal form. 6/1130 useless extension candidates. Maximal degree in co-relation 7695. Up to 500 conditions per place. [2023-08-24 09:51:38,210 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 132 selfloop transitions, 136 changer transitions 53/321 dead transitions. [2023-08-24 09:51:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 321 transitions, 4034 flow [2023-08-24 09:51:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:51:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:51:38,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2134 transitions. [2023-08-24 09:51:38,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060121765601218 [2023-08-24 09:51:38,214 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2134 transitions. [2023-08-24 09:51:38,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2134 transitions. [2023-08-24 09:51:38,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:38,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2134 transitions. [2023-08-24 09:51:38,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.27777777777778) internal successors, (2134), 36 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:38,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:38,223 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:38,223 INFO L175 Difference]: Start difference. First operand has 200 places, 185 transitions, 1961 flow. Second operand 36 states and 2134 transitions. [2023-08-24 09:51:38,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 321 transitions, 4034 flow [2023-08-24 09:51:38,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 321 transitions, 3312 flow, removed 242 selfloop flow, removed 32 redundant places. [2023-08-24 09:51:38,275 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2562 flow [2023-08-24 09:51:38,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2562, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2023-08-24 09:51:38,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 09:51:38,276 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2562 flow [2023-08-24 09:51:38,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:38,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:38,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:38,281 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 09:51:38,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 09:51:38,477 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 09:51:38,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:38,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1404157479, now seen corresponding path program 15 times [2023-08-24 09:51:38,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:38,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774466897] [2023-08-24 09:51:38,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:38,668 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 09:51:38,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:38,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774466897] [2023-08-24 09:51:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774466897] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:38,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104449054] [2023-08-24 09:51:38,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:51:38,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:38,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:38,670 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 09:51:38,694 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 09:51:38,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:51:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:38,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:38,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:38,952 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 09:51:38,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:39,367 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 09:51:39,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104449054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:39,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:39,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:39,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012525154] [2023-08-24 09:51:39,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:39,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:39,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:39,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:39,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:39,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2562 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:39,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:39,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:39,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:41,229 INFO L124 PetriNetUnfolderBase]: 562/1114 cut-off events. [2023-08-24 09:51:41,229 INFO L125 PetriNetUnfolderBase]: For 17163/17163 co-relation queries the response was YES. [2023-08-24 09:51:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7441 conditions, 1114 events. 562/1114 cut-off events. For 17163/17163 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6223 event pairs, 34 based on Foata normal form. 4/1118 useless extension candidates. Maximal degree in co-relation 7369. Up to 720 conditions per place. [2023-08-24 09:51:41,239 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 176 selfloop transitions, 115 changer transitions 21/312 dead transitions. [2023-08-24 09:51:41,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 312 transitions, 3848 flow [2023-08-24 09:51:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:51:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:51:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2133 transitions. [2023-08-24 09:51:41,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058219178082192 [2023-08-24 09:51:41,242 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2133 transitions. [2023-08-24 09:51:41,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2133 transitions. [2023-08-24 09:51:41,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:41,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2133 transitions. [2023-08-24 09:51:41,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.25) internal successors, (2133), 36 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:41,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:41,250 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:41,250 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2562 flow. Second operand 36 states and 2133 transitions. [2023-08-24 09:51:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 312 transitions, 3848 flow [2023-08-24 09:51:41,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 312 transitions, 3184 flow, removed 286 selfloop flow, removed 19 redundant places. [2023-08-24 09:51:41,315 INFO L231 Difference]: Finished difference. Result has 212 places, 238 transitions, 2611 flow [2023-08-24 09:51:41,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2611, PETRI_PLACES=212, PETRI_TRANSITIONS=238} [2023-08-24 09:51:41,316 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2023-08-24 09:51:41,316 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 238 transitions, 2611 flow [2023-08-24 09:51:41,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:41,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:41,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:41,322 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 09:51:41,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 09:51:41,523 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 09:51:41,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 435494011, now seen corresponding path program 16 times [2023-08-24 09:51:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612309533] [2023-08-24 09:51:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:41,713 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 09:51:41,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612309533] [2023-08-24 09:51:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612309533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540742945] [2023-08-24 09:51:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:51:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:41,714 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 09:51:41,717 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 09:51:41,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:51:41,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:41,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 09:51:41,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:42,021 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 09:51:42,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:42,213 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 09:51:42,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540742945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:42,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 09:51:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195704717] [2023-08-24 09:51:42,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:42,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:51:42,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:51:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 09:51:42,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:42,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 238 transitions, 2611 flow. Second operand has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:42,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:42,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:42,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:43,316 INFO L124 PetriNetUnfolderBase]: 677/1393 cut-off events. [2023-08-24 09:51:43,316 INFO L125 PetriNetUnfolderBase]: For 19763/19763 co-relation queries the response was YES. [2023-08-24 09:51:43,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8779 conditions, 1393 events. 677/1393 cut-off events. For 19763/19763 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8579 event pairs, 37 based on Foata normal form. 6/1399 useless extension candidates. Maximal degree in co-relation 8615. Up to 560 conditions per place. [2023-08-24 09:51:43,327 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 178 selfloop transitions, 174 changer transitions 32/384 dead transitions. [2023-08-24 09:51:43,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 384 transitions, 4674 flow [2023-08-24 09:51:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 09:51:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 09:51:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2081 transitions. [2023-08-24 09:51:43,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072407045009785 [2023-08-24 09:51:43,335 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2081 transitions. [2023-08-24 09:51:43,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2081 transitions. [2023-08-24 09:51:43,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:43,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2081 transitions. [2023-08-24 09:51:43,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.457142857142856) internal successors, (2081), 35 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:43,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:43,349 INFO L175 Difference]: Start difference. First operand has 212 places, 238 transitions, 2611 flow. Second operand 35 states and 2081 transitions. [2023-08-24 09:51:43,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 384 transitions, 4674 flow [2023-08-24 09:51:43,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 384 transitions, 4391 flow, removed 62 selfloop flow, removed 19 redundant places. [2023-08-24 09:51:43,419 INFO L231 Difference]: Finished difference. Result has 233 places, 281 transitions, 3652 flow [2023-08-24 09:51:43,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3652, PETRI_PLACES=233, PETRI_TRANSITIONS=281} [2023-08-24 09:51:43,420 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2023-08-24 09:51:43,420 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 281 transitions, 3652 flow [2023-08-24 09:51:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:43,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:43,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:43,429 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 09:51:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 09:51:43,626 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 09:51:43,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:43,627 INFO L85 PathProgramCache]: Analyzing trace with hash 420387091, now seen corresponding path program 17 times [2023-08-24 09:51:43,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:43,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077378127] [2023-08-24 09:51:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:43,809 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 09:51:43,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077378127] [2023-08-24 09:51:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077378127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:43,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958221314] [2023-08-24 09:51:43,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:51:43,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:43,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:43,811 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 09:51:43,824 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 09:51:43,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:43,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:51:43,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:44,009 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 09:51:44,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:44,211 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 09:51:44,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958221314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:44,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:44,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 09:51:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840330784] [2023-08-24 09:51:44,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:51:44,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:44,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:51:44,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:51:44,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:44,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 281 transitions, 3652 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:44,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:44,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:44,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:45,324 INFO L124 PetriNetUnfolderBase]: 726/1476 cut-off events. [2023-08-24 09:51:45,324 INFO L125 PetriNetUnfolderBase]: For 26429/26429 co-relation queries the response was YES. [2023-08-24 09:51:45,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 1476 events. 726/1476 cut-off events. For 26429/26429 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9129 event pairs, 53 based on Foata normal form. 12/1488 useless extension candidates. Maximal degree in co-relation 10166. Up to 550 conditions per place. [2023-08-24 09:51:45,335 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 171 selfloop transitions, 188 changer transitions 28/387 dead transitions. [2023-08-24 09:51:45,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 387 transitions, 5398 flow [2023-08-24 09:51:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:51:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:51:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2138 transitions. [2023-08-24 09:51:45,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067732115677321 [2023-08-24 09:51:45,338 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2138 transitions. [2023-08-24 09:51:45,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2138 transitions. [2023-08-24 09:51:45,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:45,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2138 transitions. [2023-08-24 09:51:45,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.388888888888886) internal successors, (2138), 36 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:45,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:45,345 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:45,345 INFO L175 Difference]: Start difference. First operand has 233 places, 281 transitions, 3652 flow. Second operand 36 states and 2138 transitions. [2023-08-24 09:51:45,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 387 transitions, 5398 flow [2023-08-24 09:51:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 387 transitions, 4703 flow, removed 310 selfloop flow, removed 16 redundant places. [2023-08-24 09:51:45,476 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3800 flow [2023-08-24 09:51:45,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3800, PETRI_PLACES=250, PETRI_TRANSITIONS=293} [2023-08-24 09:51:45,477 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 230 predicate places. [2023-08-24 09:51:45,477 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3800 flow [2023-08-24 09:51:45,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:45,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:45,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:45,486 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 09:51:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:45,684 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 09:51:45,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1963019265, now seen corresponding path program 18 times [2023-08-24 09:51:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545353581] [2023-08-24 09:51:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:45,850 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 09:51:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:45,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545353581] [2023-08-24 09:51:45,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545353581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:45,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950176772] [2023-08-24 09:51:45,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:51:45,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:45,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:45,852 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 09:51:45,876 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 09:51:45,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:51:45,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:45,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:45,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:46,143 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 09:51:46,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:46,587 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 09:51:46,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950176772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:46,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:46,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:46,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823411966] [2023-08-24 09:51:46,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:46,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:46,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:46,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:46,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:46,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 293 transitions, 3800 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:46,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:46,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:48,024 INFO L124 PetriNetUnfolderBase]: 720/1454 cut-off events. [2023-08-24 09:51:48,024 INFO L125 PetriNetUnfolderBase]: For 16586/16586 co-relation queries the response was YES. [2023-08-24 09:51:48,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9536 conditions, 1454 events. 720/1454 cut-off events. For 16586/16586 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8848 event pairs, 44 based on Foata normal form. 4/1458 useless extension candidates. Maximal degree in co-relation 9357. Up to 1217 conditions per place. [2023-08-24 09:51:48,038 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 293 selfloop transitions, 72 changer transitions 25/390 dead transitions. [2023-08-24 09:51:48,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 390 transitions, 5244 flow [2023-08-24 09:51:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 09:51:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 09:51:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1784 transitions. [2023-08-24 09:51:48,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730593607305937 [2023-08-24 09:51:48,041 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1784 transitions. [2023-08-24 09:51:48,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1784 transitions. [2023-08-24 09:51:48,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:48,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1784 transitions. [2023-08-24 09:51:48,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.46666666666667) internal successors, (1784), 30 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:48,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 146.0) internal successors, (4526), 31 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:48,047 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 146.0) internal successors, (4526), 31 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:48,047 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3800 flow. Second operand 30 states and 1784 transitions. [2023-08-24 09:51:48,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 390 transitions, 5244 flow [2023-08-24 09:51:48,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 390 transitions, 4844 flow, removed 58 selfloop flow, removed 21 redundant places. [2023-08-24 09:51:48,139 INFO L231 Difference]: Finished difference. Result has 265 places, 320 transitions, 4067 flow [2023-08-24 09:51:48,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4067, PETRI_PLACES=265, PETRI_TRANSITIONS=320} [2023-08-24 09:51:48,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-08-24 09:51:48,140 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 4067 flow [2023-08-24 09:51:48,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:48,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:48,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:48,146 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 09:51:48,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:48,346 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 09:51:48,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash -123367775, now seen corresponding path program 19 times [2023-08-24 09:51:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78918577] [2023-08-24 09:51:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:48,505 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 09:51:48,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78918577] [2023-08-24 09:51:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78918577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90633857] [2023-08-24 09:51:48,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:51:48,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:48,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:48,507 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 09:51:48,511 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 09:51:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:48,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:51:48,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:48,685 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 09:51:48,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:48,850 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 09:51:48,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90633857] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:48,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:48,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 09:51:48,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006481492] [2023-08-24 09:51:48,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:51:48,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:51:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:51:48,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:48,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 4067 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:48,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:48,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:48,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:50,100 INFO L124 PetriNetUnfolderBase]: 937/1915 cut-off events. [2023-08-24 09:51:50,101 INFO L125 PetriNetUnfolderBase]: For 22716/22716 co-relation queries the response was YES. [2023-08-24 09:51:50,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12819 conditions, 1915 events. 937/1915 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12639 event pairs, 49 based on Foata normal form. 10/1925 useless extension candidates. Maximal degree in co-relation 12680. Up to 1045 conditions per place. [2023-08-24 09:51:50,118 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 309 selfloop transitions, 178 changer transitions 28/515 dead transitions. [2023-08-24 09:51:50,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 515 transitions, 7319 flow [2023-08-24 09:51:50,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 09:51:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 09:51:50,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2485 transitions. [2023-08-24 09:51:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052511415525114 [2023-08-24 09:51:50,130 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2485 transitions. [2023-08-24 09:51:50,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2485 transitions. [2023-08-24 09:51:50,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:50,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2485 transitions. [2023-08-24 09:51:50,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 59.166666666666664) internal successors, (2485), 42 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:50,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 146.0) internal successors, (6278), 43 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:50,142 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 146.0) internal successors, (6278), 43 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:50,142 INFO L175 Difference]: Start difference. First operand has 265 places, 320 transitions, 4067 flow. Second operand 42 states and 2485 transitions. [2023-08-24 09:51:50,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 515 transitions, 7319 flow [2023-08-24 09:51:50,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 515 transitions, 6743 flow, removed 260 selfloop flow, removed 13 redundant places. [2023-08-24 09:51:50,282 INFO L231 Difference]: Finished difference. Result has 301 places, 405 transitions, 5574 flow [2023-08-24 09:51:50,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5574, PETRI_PLACES=301, PETRI_TRANSITIONS=405} [2023-08-24 09:51:50,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 281 predicate places. [2023-08-24 09:51:50,283 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 405 transitions, 5574 flow [2023-08-24 09:51:50,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:50,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:50,283 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:50,292 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 09:51:50,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-24 09:51:50,489 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 09:51:50,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:50,490 INFO L85 PathProgramCache]: Analyzing trace with hash 736696047, now seen corresponding path program 20 times [2023-08-24 09:51:50,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:50,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761240956] [2023-08-24 09:51:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:50,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:50,660 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 09:51:50,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:50,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761240956] [2023-08-24 09:51:50,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761240956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:50,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242953827] [2023-08-24 09:51:50,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:51:50,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:50,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:50,665 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 09:51:50,687 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 09:51:50,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:51:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:50,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:50,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:50,967 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 09:51:50,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:51,309 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 09:51:51,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242953827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:51,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:51,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:51,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883472482] [2023-08-24 09:51:51,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:51,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:51,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 405 transitions, 5574 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:51,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:51,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:51,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:52,238 INFO L124 PetriNetUnfolderBase]: 956/1900 cut-off events. [2023-08-24 09:51:52,238 INFO L125 PetriNetUnfolderBase]: For 26711/26711 co-relation queries the response was YES. [2023-08-24 09:51:52,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13488 conditions, 1900 events. 956/1900 cut-off events. For 26711/26711 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12192 event pairs, 52 based on Foata normal form. 6/1906 useless extension candidates. Maximal degree in co-relation 13343. Up to 1560 conditions per place. [2023-08-24 09:51:52,254 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 349 selfloop transitions, 67 changer transitions 63/479 dead transitions. [2023-08-24 09:51:52,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 479 transitions, 7257 flow [2023-08-24 09:51:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 09:51:52,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 09:51:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1473 transitions. [2023-08-24 09:51:52,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40356164383561643 [2023-08-24 09:51:52,257 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1473 transitions. [2023-08-24 09:51:52,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1473 transitions. [2023-08-24 09:51:52,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:52,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1473 transitions. [2023-08-24 09:51:52,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.92) internal successors, (1473), 25 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:52,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:52,262 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:52,262 INFO L175 Difference]: Start difference. First operand has 301 places, 405 transitions, 5574 flow. Second operand 25 states and 1473 transitions. [2023-08-24 09:51:52,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 479 transitions, 7257 flow [2023-08-24 09:51:52,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 479 transitions, 6471 flow, removed 343 selfloop flow, removed 22 redundant places. [2023-08-24 09:51:52,417 INFO L231 Difference]: Finished difference. Result has 307 places, 386 transitions, 5054 flow [2023-08-24 09:51:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5054, PETRI_PLACES=307, PETRI_TRANSITIONS=386} [2023-08-24 09:51:52,418 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-08-24 09:51:52,418 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 386 transitions, 5054 flow [2023-08-24 09:51:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:52,418 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:52,423 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 09:51:52,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 09:51:52,621 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 09:51:52,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1907000821, now seen corresponding path program 21 times [2023-08-24 09:51:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:52,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083379981] [2023-08-24 09:51:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:52,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:52,789 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 09:51:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083379981] [2023-08-24 09:51:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083379981] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678328651] [2023-08-24 09:51:52,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:51:52,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:52,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:52,791 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 09:51:52,793 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 09:51:52,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:51:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:52,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 09:51:52,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:53,044 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 09:51:53,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:53,374 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 09:51:53,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678328651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:53,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:53,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 09:51:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515685458] [2023-08-24 09:51:53,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:51:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:53,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:51:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:51:53,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:53,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 386 transitions, 5054 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:53,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:53,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:53,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:54,727 INFO L124 PetriNetUnfolderBase]: 917/1823 cut-off events. [2023-08-24 09:51:54,727 INFO L125 PetriNetUnfolderBase]: For 22331/22331 co-relation queries the response was YES. [2023-08-24 09:51:54,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 1823 events. 917/1823 cut-off events. For 22331/22331 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11606 event pairs, 56 based on Foata normal form. 4/1825 useless extension candidates. Maximal degree in co-relation 12253. Up to 1590 conditions per place. [2023-08-24 09:51:54,743 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 373 selfloop transitions, 65 changer transitions 25/463 dead transitions. [2023-08-24 09:51:54,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 463 transitions, 6572 flow [2023-08-24 09:51:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 09:51:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 09:51:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1487 transitions. [2023-08-24 09:51:54,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073972602739726 [2023-08-24 09:51:54,746 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1487 transitions. [2023-08-24 09:51:54,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1487 transitions. [2023-08-24 09:51:54,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:54,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1487 transitions. [2023-08-24 09:51:54,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.48) internal successors, (1487), 25 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:54,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:54,752 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:54,752 INFO L175 Difference]: Start difference. First operand has 307 places, 386 transitions, 5054 flow. Second operand 25 states and 1487 transitions. [2023-08-24 09:51:54,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 463 transitions, 6572 flow [2023-08-24 09:51:54,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 463 transitions, 6319 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-08-24 09:51:54,915 INFO L231 Difference]: Finished difference. Result has 301 places, 405 transitions, 5402 flow [2023-08-24 09:51:54,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5402, PETRI_PLACES=301, PETRI_TRANSITIONS=405} [2023-08-24 09:51:54,916 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 281 predicate places. [2023-08-24 09:51:54,916 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 405 transitions, 5402 flow [2023-08-24 09:51:54,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:54,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:54,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:54,923 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 09:51:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:55,117 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 09:51:55,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash -548314985, now seen corresponding path program 22 times [2023-08-24 09:51:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084918640] [2023-08-24 09:51:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:55,277 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 09:51:55,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084918640] [2023-08-24 09:51:55,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084918640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207886730] [2023-08-24 09:51:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:51:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:55,278 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 09:51:55,280 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 09:51:55,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:51:55,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:55,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 09:51:55,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:55,536 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 09:51:55,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:55,719 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 09:51:55,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207886730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:55,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:55,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 09:51:55,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034637967] [2023-08-24 09:51:55,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:55,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:51:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:51:55,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 09:51:55,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:55,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 405 transitions, 5402 flow. Second operand has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:55,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:55,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:55,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:57,092 INFO L124 PetriNetUnfolderBase]: 1018/2060 cut-off events. [2023-08-24 09:51:57,092 INFO L125 PetriNetUnfolderBase]: For 30755/30755 co-relation queries the response was YES. [2023-08-24 09:51:57,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14286 conditions, 2060 events. 1018/2060 cut-off events. For 30755/30755 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13733 event pairs, 47 based on Foata normal form. 8/2066 useless extension candidates. Maximal degree in co-relation 14137. Up to 1499 conditions per place. [2023-08-24 09:51:57,111 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 392 selfloop transitions, 114 changer transitions 31/537 dead transitions. [2023-08-24 09:51:57,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 537 transitions, 7912 flow [2023-08-24 09:51:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 09:51:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 09:51:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2080 transitions. [2023-08-24 09:51:57,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070450097847358 [2023-08-24 09:51:57,119 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2080 transitions. [2023-08-24 09:51:57,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2080 transitions. [2023-08-24 09:51:57,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:57,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2080 transitions. [2023-08-24 09:51:57,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.42857142857143) internal successors, (2080), 35 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:57,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:57,126 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:57,126 INFO L175 Difference]: Start difference. First operand has 301 places, 405 transitions, 5402 flow. Second operand 35 states and 2080 transitions. [2023-08-24 09:51:57,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 537 transitions, 7912 flow [2023-08-24 09:51:57,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 537 transitions, 7487 flow, removed 181 selfloop flow, removed 12 redundant places. [2023-08-24 09:51:57,276 INFO L231 Difference]: Finished difference. Result has 328 places, 447 transitions, 6284 flow [2023-08-24 09:51:57,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6284, PETRI_PLACES=328, PETRI_TRANSITIONS=447} [2023-08-24 09:51:57,277 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2023-08-24 09:51:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 447 transitions, 6284 flow [2023-08-24 09:51:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:57,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-24 09:51:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:57,478 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 09:51:57,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:57,478 INFO L85 PathProgramCache]: Analyzing trace with hash 311748837, now seen corresponding path program 23 times [2023-08-24 09:51:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606938425] [2023-08-24 09:51:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:57,661 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 09:51:57,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:57,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606938425] [2023-08-24 09:51:57,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606938425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:57,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456978990] [2023-08-24 09:51:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:51:57,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:57,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:57,665 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 09:51:57,692 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 09:51:57,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:51:57,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:57,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 09:51:57,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:57,964 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 09:51:57,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:58,144 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 09:51:58,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456978990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:58,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:58,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 09:51:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278092368] [2023-08-24 09:51:58,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:58,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:51:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:51:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:51:58,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:58,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 447 transitions, 6284 flow. Second operand has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:58,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:58,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:58,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:51:58,994 INFO L124 PetriNetUnfolderBase]: 1015/2008 cut-off events. [2023-08-24 09:51:58,994 INFO L125 PetriNetUnfolderBase]: For 32636/32636 co-relation queries the response was YES. [2023-08-24 09:51:59,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14351 conditions, 2008 events. 1015/2008 cut-off events. For 32636/32636 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 12992 event pairs, 55 based on Foata normal form. 7/2013 useless extension candidates. Maximal degree in co-relation 14196. Up to 1607 conditions per place. [2023-08-24 09:51:59,012 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 378 selfloop transitions, 71 changer transitions 62/511 dead transitions. [2023-08-24 09:51:59,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 511 transitions, 7945 flow [2023-08-24 09:51:59,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 09:51:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 09:51:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1297 transitions. [2023-08-24 09:51:59,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40379825653798257 [2023-08-24 09:51:59,015 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1297 transitions. [2023-08-24 09:51:59,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1297 transitions. [2023-08-24 09:51:59,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:51:59,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1297 transitions. [2023-08-24 09:51:59,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.95454545454545) internal successors, (1297), 22 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:59,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 146.0) internal successors, (3358), 23 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:59,019 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 146.0) internal successors, (3358), 23 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:59,019 INFO L175 Difference]: Start difference. First operand has 328 places, 447 transitions, 6284 flow. Second operand 22 states and 1297 transitions. [2023-08-24 09:51:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 511 transitions, 7945 flow [2023-08-24 09:51:59,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 511 transitions, 6872 flow, removed 496 selfloop flow, removed 17 redundant places. [2023-08-24 09:51:59,176 INFO L231 Difference]: Finished difference. Result has 334 places, 421 transitions, 5422 flow [2023-08-24 09:51:59,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5422, PETRI_PLACES=334, PETRI_TRANSITIONS=421} [2023-08-24 09:51:59,177 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-08-24 09:51:59,177 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 421 transitions, 5422 flow [2023-08-24 09:51:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:59,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:51:59,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:51:59,181 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 09:51:59,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 09:51:59,378 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 09:51:59,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:51:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash -908074734, now seen corresponding path program 24 times [2023-08-24 09:51:59,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:51:59,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911479262] [2023-08-24 09:51:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:51:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:51:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:51:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:59,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:51:59,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911479262] [2023-08-24 09:51:59,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911479262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:51:59,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740989842] [2023-08-24 09:51:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:51:59,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:51:59,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:51:59,566 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 09:51:59,572 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 09:51:59,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:51:59,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:51:59,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 09:51:59,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:51:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:59,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:51:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:51:59,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740989842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:51:59,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:51:59,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 09:51:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173112068] [2023-08-24 09:51:59,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:51:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:51:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:51:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:51:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:51:59,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:51:59,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 421 transitions, 5422 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:51:59,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:51:59,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:51:59,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:00,823 INFO L124 PetriNetUnfolderBase]: 987/1931 cut-off events. [2023-08-24 09:52:00,823 INFO L125 PetriNetUnfolderBase]: For 25340/25340 co-relation queries the response was YES. [2023-08-24 09:52:00,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13130 conditions, 1931 events. 987/1931 cut-off events. For 25340/25340 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12231 event pairs, 49 based on Foata normal form. 6/1935 useless extension candidates. Maximal degree in co-relation 12974. Up to 1208 conditions per place. [2023-08-24 09:52:00,839 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 309 selfloop transitions, 175 changer transitions 26/510 dead transitions. [2023-08-24 09:52:00,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 510 transitions, 7308 flow [2023-08-24 09:52:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 09:52:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 09:52:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1500 transitions. [2023-08-24 09:52:00,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410958904109589 [2023-08-24 09:52:00,841 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1500 transitions. [2023-08-24 09:52:00,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1500 transitions. [2023-08-24 09:52:00,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:00,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1500 transitions. [2023-08-24 09:52:00,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:00,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:00,846 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:00,846 INFO L175 Difference]: Start difference. First operand has 334 places, 421 transitions, 5422 flow. Second operand 25 states and 1500 transitions. [2023-08-24 09:52:00,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 510 transitions, 7308 flow [2023-08-24 09:52:01,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 510 transitions, 7078 flow, removed 57 selfloop flow, removed 23 redundant places. [2023-08-24 09:52:01,025 INFO L231 Difference]: Finished difference. Result has 330 places, 431 transitions, 5855 flow [2023-08-24 09:52:01,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5855, PETRI_PLACES=330, PETRI_TRANSITIONS=431} [2023-08-24 09:52:01,026 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-08-24 09:52:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 431 transitions, 5855 flow [2023-08-24 09:52:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:01,032 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 09:52:01,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 09:52:01,227 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 09:52:01,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:01,227 INFO L85 PathProgramCache]: Analyzing trace with hash -389311164, now seen corresponding path program 25 times [2023-08-24 09:52:01,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897047360] [2023-08-24 09:52:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:01,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897047360] [2023-08-24 09:52:01,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897047360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:01,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922635365] [2023-08-24 09:52:01,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:52:01,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:01,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:01,421 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 09:52:01,430 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 09:52:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:01,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 09:52:01,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:01,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:01,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922635365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:01,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:01,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 09:52:01,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813927145] [2023-08-24 09:52:01,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:01,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:52:01,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:01,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:52:01,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:52:01,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:01,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 431 transitions, 5855 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:01,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:01,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:01,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:02,930 INFO L124 PetriNetUnfolderBase]: 1111/2160 cut-off events. [2023-08-24 09:52:02,931 INFO L125 PetriNetUnfolderBase]: For 38343/38343 co-relation queries the response was YES. [2023-08-24 09:52:02,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16034 conditions, 2160 events. 1111/2160 cut-off events. For 38343/38343 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 13940 event pairs, 47 based on Foata normal form. 6/2164 useless extension candidates. Maximal degree in co-relation 15878. Up to 1091 conditions per place. [2023-08-24 09:52:02,947 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 327 selfloop transitions, 219 changer transitions 23/569 dead transitions. [2023-08-24 09:52:02,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 569 transitions, 8718 flow [2023-08-24 09:52:02,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:52:02,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:52:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1677 transitions. [2023-08-24 09:52:02,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41022504892367906 [2023-08-24 09:52:02,949 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1677 transitions. [2023-08-24 09:52:02,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1677 transitions. [2023-08-24 09:52:02,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:02,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1677 transitions. [2023-08-24 09:52:02,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 59.892857142857146) internal successors, (1677), 28 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:02,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:02,953 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:02,953 INFO L175 Difference]: Start difference. First operand has 330 places, 431 transitions, 5855 flow. Second operand 28 states and 1677 transitions. [2023-08-24 09:52:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 569 transitions, 8718 flow [2023-08-24 09:52:03,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 569 transitions, 8307 flow, removed 88 selfloop flow, removed 25 redundant places. [2023-08-24 09:52:03,131 INFO L231 Difference]: Finished difference. Result has 337 places, 478 transitions, 7163 flow [2023-08-24 09:52:03,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7163, PETRI_PLACES=337, PETRI_TRANSITIONS=478} [2023-08-24 09:52:03,131 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2023-08-24 09:52:03,131 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 478 transitions, 7163 flow [2023-08-24 09:52:03,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:03,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:03,132 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:03,137 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 09:52:03,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 09:52:03,332 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 09:52:03,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:03,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1273748123, now seen corresponding path program 26 times [2023-08-24 09:52:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:03,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70773512] [2023-08-24 09:52:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:03,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:03,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:03,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70773512] [2023-08-24 09:52:03,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70773512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:03,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854758498] [2023-08-24 09:52:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:52:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:03,525 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:52:03,548 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 09:52:03,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:52:03,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:03,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 09:52:03,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:03,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:04,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854758498] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:04,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:04,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 09:52:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102724202] [2023-08-24 09:52:04,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:04,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:52:04,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:04,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:52:04,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:52:04,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:04,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 478 transitions, 7163 flow. Second operand has 26 states, 26 states have (on average 56.65384615384615) internal successors, (1473), 26 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:04,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:04,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:04,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:05,683 INFO L124 PetriNetUnfolderBase]: 1531/2968 cut-off events. [2023-08-24 09:52:05,683 INFO L125 PetriNetUnfolderBase]: For 78519/78519 co-relation queries the response was YES. [2023-08-24 09:52:05,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24711 conditions, 2968 events. 1531/2968 cut-off events. For 78519/78519 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20379 event pairs, 40 based on Foata normal form. 18/2980 useless extension candidates. Maximal degree in co-relation 24562. Up to 924 conditions per place. [2023-08-24 09:52:05,705 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 355 selfloop transitions, 345 changer transitions 28/728 dead transitions. [2023-08-24 09:52:05,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 728 transitions, 12306 flow [2023-08-24 09:52:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:52:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:52:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2373 transitions. [2023-08-24 09:52:05,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40633561643835614 [2023-08-24 09:52:05,707 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2373 transitions. [2023-08-24 09:52:05,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2373 transitions. [2023-08-24 09:52:05,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:05,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2373 transitions. [2023-08-24 09:52:05,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 59.325) internal successors, (2373), 40 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:05,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 146.0) internal successors, (5986), 41 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:05,713 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 146.0) internal successors, (5986), 41 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:05,713 INFO L175 Difference]: Start difference. First operand has 337 places, 478 transitions, 7163 flow. Second operand 40 states and 2373 transitions. [2023-08-24 09:52:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 728 transitions, 12306 flow [2023-08-24 09:52:06,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 728 transitions, 11256 flow, removed 439 selfloop flow, removed 17 redundant places. [2023-08-24 09:52:06,079 INFO L231 Difference]: Finished difference. Result has 360 places, 579 transitions, 9228 flow [2023-08-24 09:52:06,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9228, PETRI_PLACES=360, PETRI_TRANSITIONS=579} [2023-08-24 09:52:06,080 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-24 09:52:06,080 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 579 transitions, 9228 flow [2023-08-24 09:52:06,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.65384615384615) internal successors, (1473), 26 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:06,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:06,080 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:06,085 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 09:52:06,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 09:52:06,284 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 09:52:06,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash 805310178, now seen corresponding path program 27 times [2023-08-24 09:52:06,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:06,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157136458] [2023-08-24 09:52:06,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:06,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:06,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:06,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157136458] [2023-08-24 09:52:06,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157136458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:06,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101526181] [2023-08-24 09:52:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:52:06,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:06,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:06,517 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 09:52:06,532 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 09:52:06,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:52:06,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:06,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 09:52:06,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:06,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:07,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101526181] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:07,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:07,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-08-24 09:52:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156337289] [2023-08-24 09:52:07,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:52:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:52:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:52:07,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:07,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 579 transitions, 9228 flow. Second operand has 25 states, 25 states have (on average 56.64) internal successors, (1416), 25 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:07,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:07,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:07,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:08,677 INFO L124 PetriNetUnfolderBase]: 1670/3197 cut-off events. [2023-08-24 09:52:08,677 INFO L125 PetriNetUnfolderBase]: For 89477/89477 co-relation queries the response was YES. [2023-08-24 09:52:08,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28246 conditions, 3197 events. 1670/3197 cut-off events. For 89477/89477 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21876 event pairs, 36 based on Foata normal form. 20/3217 useless extension candidates. Maximal degree in co-relation 28023. Up to 957 conditions per place. [2023-08-24 09:52:08,708 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 304 selfloop transitions, 448 changer transitions 45/797 dead transitions. [2023-08-24 09:52:08,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 797 transitions, 14235 flow [2023-08-24 09:52:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 09:52:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 09:52:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2139 transitions. [2023-08-24 09:52:08,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069634703196347 [2023-08-24 09:52:08,710 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2139 transitions. [2023-08-24 09:52:08,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2139 transitions. [2023-08-24 09:52:08,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:08,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2139 transitions. [2023-08-24 09:52:08,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.416666666666664) internal successors, (2139), 36 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:08,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:08,715 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:08,715 INFO L175 Difference]: Start difference. First operand has 360 places, 579 transitions, 9228 flow. Second operand 36 states and 2139 transitions. [2023-08-24 09:52:08,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 797 transitions, 14235 flow [2023-08-24 09:52:09,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 797 transitions, 13260 flow, removed 368 selfloop flow, removed 30 redundant places. [2023-08-24 09:52:09,171 INFO L231 Difference]: Finished difference. Result has 369 places, 665 transitions, 11713 flow [2023-08-24 09:52:09,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11713, PETRI_PLACES=369, PETRI_TRANSITIONS=665} [2023-08-24 09:52:09,172 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-24 09:52:09,172 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 665 transitions, 11713 flow [2023-08-24 09:52:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.64) internal successors, (1416), 25 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:09,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:09,173 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:09,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:09,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 09:52:09,375 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 09:52:09,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1283601315, now seen corresponding path program 28 times [2023-08-24 09:52:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885509448] [2023-08-24 09:52:09,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:09,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:09,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:09,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885509448] [2023-08-24 09:52:09,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885509448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:09,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997504703] [2023-08-24 09:52:09,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:52:09,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:09,548 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 09:52:09,550 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 09:52:09,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:52:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:09,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 09:52:09,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:09,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:09,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997504703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:09,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:09,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:52:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816945808] [2023-08-24 09:52:09,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:09,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:52:09,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:52:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:52:09,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:09,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 665 transitions, 11713 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:09,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:09,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:09,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:12,384 INFO L124 PetriNetUnfolderBase]: 2178/3989 cut-off events. [2023-08-24 09:52:12,385 INFO L125 PetriNetUnfolderBase]: For 137265/137265 co-relation queries the response was YES. [2023-08-24 09:52:12,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39566 conditions, 3989 events. 2178/3989 cut-off events. For 137265/137265 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 27274 event pairs, 55 based on Foata normal form. 14/4003 useless extension candidates. Maximal degree in co-relation 39338. Up to 1871 conditions per place. [2023-08-24 09:52:12,428 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 528 selfloop transitions, 462 changer transitions 25/1015 dead transitions. [2023-08-24 09:52:12,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1015 transitions, 20726 flow [2023-08-24 09:52:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 09:52:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 09:52:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3358 transitions. [2023-08-24 09:52:12,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-24 09:52:12,432 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3358 transitions. [2023-08-24 09:52:12,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3358 transitions. [2023-08-24 09:52:12,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:12,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3358 transitions. [2023-08-24 09:52:12,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.91228070175438) internal successors, (3358), 57 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:12,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:12,443 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:12,443 INFO L175 Difference]: Start difference. First operand has 369 places, 665 transitions, 11713 flow. Second operand 57 states and 3358 transitions. [2023-08-24 09:52:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1015 transitions, 20726 flow [2023-08-24 09:52:13,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1015 transitions, 18020 flow, removed 1197 selfloop flow, removed 25 redundant places. [2023-08-24 09:52:13,247 INFO L231 Difference]: Finished difference. Result has 405 places, 871 transitions, 16178 flow [2023-08-24 09:52:13,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=10381, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=16178, PETRI_PLACES=405, PETRI_TRANSITIONS=871} [2023-08-24 09:52:13,248 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-08-24 09:52:13,248 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 871 transitions, 16178 flow [2023-08-24 09:52:13,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:13,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:13,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:13,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:13,450 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 09:52:13,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1572062937, now seen corresponding path program 29 times [2023-08-24 09:52:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592555031] [2023-08-24 09:52:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:13,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:13,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592555031] [2023-08-24 09:52:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592555031] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:13,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722350491] [2023-08-24 09:52:13,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:52:13,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:13,633 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 09:52:13,656 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 09:52:13,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:52:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:13,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 09:52:13,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:13,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:14,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722350491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:14,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:14,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:52:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576094219] [2023-08-24 09:52:14,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:14,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:52:14,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:52:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:52:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:14,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 871 transitions, 16178 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:14,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:14,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:14,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:16,218 INFO L124 PetriNetUnfolderBase]: 2271/4104 cut-off events. [2023-08-24 09:52:16,218 INFO L125 PetriNetUnfolderBase]: For 126196/126196 co-relation queries the response was YES. [2023-08-24 09:52:16,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39088 conditions, 4104 events. 2271/4104 cut-off events. For 126196/126196 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 27758 event pairs, 44 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 38861. Up to 3463 conditions per place. [2023-08-24 09:52:16,254 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 847 selfloop transitions, 141 changer transitions 24/1012 dead transitions. [2023-08-24 09:52:16,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1012 transitions, 19898 flow [2023-08-24 09:52:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:52:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:52:16,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2245 transitions. [2023-08-24 09:52:16,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046503244412401 [2023-08-24 09:52:16,256 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2245 transitions. [2023-08-24 09:52:16,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2245 transitions. [2023-08-24 09:52:16,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:16,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2245 transitions. [2023-08-24 09:52:16,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.078947368421055) internal successors, (2245), 38 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:16,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:16,260 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:16,260 INFO L175 Difference]: Start difference. First operand has 405 places, 871 transitions, 16178 flow. Second operand 38 states and 2245 transitions. [2023-08-24 09:52:16,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1012 transitions, 19898 flow [2023-08-24 09:52:17,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1012 transitions, 18308 flow, removed 734 selfloop flow, removed 26 redundant places. [2023-08-24 09:52:17,238 INFO L231 Difference]: Finished difference. Result has 419 places, 926 transitions, 16071 flow [2023-08-24 09:52:17,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=14648, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16071, PETRI_PLACES=419, PETRI_TRANSITIONS=926} [2023-08-24 09:52:17,239 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 399 predicate places. [2023-08-24 09:52:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 926 transitions, 16071 flow [2023-08-24 09:52:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:17,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:17,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:17,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:17,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-24 09:52:17,445 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 09:52:17,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash -822618968, now seen corresponding path program 30 times [2023-08-24 09:52:17,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:17,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952637443] [2023-08-24 09:52:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:17,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:17,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952637443] [2023-08-24 09:52:17,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952637443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:17,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284923118] [2023-08-24 09:52:17,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:52:17,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:17,639 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 09:52:17,640 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 09:52:17,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:52:17,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:17,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 09:52:17,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:17,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284923118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:18,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:18,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:52:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564359720] [2023-08-24 09:52:18,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:52:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:52:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:52:18,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:18,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 926 transitions, 16071 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:18,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:18,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:18,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:20,060 INFO L124 PetriNetUnfolderBase]: 2481/4457 cut-off events. [2023-08-24 09:52:20,060 INFO L125 PetriNetUnfolderBase]: For 135643/135643 co-relation queries the response was YES. [2023-08-24 09:52:20,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42424 conditions, 4457 events. 2481/4457 cut-off events. For 135643/135643 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30286 event pairs, 49 based on Foata normal form. 7/4464 useless extension candidates. Maximal degree in co-relation 42190. Up to 3554 conditions per place. [2023-08-24 09:52:20,108 INFO L140 encePairwiseOnDemand]: 137/146 looper letters, 893 selfloop transitions, 189 changer transitions 26/1108 dead transitions. [2023-08-24 09:52:20,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1108 transitions, 22286 flow [2023-08-24 09:52:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:52:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:52:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1675 transitions. [2023-08-24 09:52:20,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097358121330724 [2023-08-24 09:52:20,110 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1675 transitions. [2023-08-24 09:52:20,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1675 transitions. [2023-08-24 09:52:20,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:20,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1675 transitions. [2023-08-24 09:52:20,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 59.82142857142857) internal successors, (1675), 28 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:20,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:20,114 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:20,114 INFO L175 Difference]: Start difference. First operand has 419 places, 926 transitions, 16071 flow. Second operand 28 states and 1675 transitions. [2023-08-24 09:52:20,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1108 transitions, 22286 flow [2023-08-24 09:52:20,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1108 transitions, 19918 flow, removed 1102 selfloop flow, removed 19 redundant places. [2023-08-24 09:52:21,016 INFO L231 Difference]: Finished difference. Result has 434 places, 1003 transitions, 17350 flow [2023-08-24 09:52:21,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=15251, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17350, PETRI_PLACES=434, PETRI_TRANSITIONS=1003} [2023-08-24 09:52:21,018 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 414 predicate places. [2023-08-24 09:52:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1003 transitions, 17350 flow [2023-08-24 09:52:21,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:21,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:21,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:21,025 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 09:52:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:21,224 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 09:52:21,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 342899340, now seen corresponding path program 31 times [2023-08-24 09:52:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692668092] [2023-08-24 09:52:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:21,441 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 09:52:21,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:21,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692668092] [2023-08-24 09:52:21,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692668092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:21,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536920847] [2023-08-24 09:52:21,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:52:21,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:21,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:21,443 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 09:52:21,444 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 09:52:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:21,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 09:52:21,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:21,661 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 09:52:21,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:21,882 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 09:52:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536920847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:21,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:21,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-24 09:52:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451853186] [2023-08-24 09:52:21,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:21,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 09:52:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 09:52:21,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-08-24 09:52:21,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:21,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1003 transitions, 17350 flow. Second operand has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:21,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:21,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:21,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:24,724 INFO L124 PetriNetUnfolderBase]: 3271/5696 cut-off events. [2023-08-24 09:52:24,724 INFO L125 PetriNetUnfolderBase]: For 186383/186383 co-relation queries the response was YES. [2023-08-24 09:52:24,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54934 conditions, 5696 events. 3271/5696 cut-off events. For 186383/186383 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 38988 event pairs, 55 based on Foata normal form. 36/5732 useless extension candidates. Maximal degree in co-relation 54691. Up to 2998 conditions per place. [2023-08-24 09:52:24,779 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 651 selfloop transitions, 591 changer transitions 334/1576 dead transitions. [2023-08-24 09:52:24,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1576 transitions, 31440 flow [2023-08-24 09:52:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 09:52:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 09:52:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2774 transitions. [2023-08-24 09:52:24,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2023-08-24 09:52:24,781 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2774 transitions. [2023-08-24 09:52:24,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2774 transitions. [2023-08-24 09:52:24,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:24,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2774 transitions. [2023-08-24 09:52:24,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 59.02127659574468) internal successors, (2774), 47 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:24,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:24,789 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:24,789 INFO L175 Difference]: Start difference. First operand has 434 places, 1003 transitions, 17350 flow. Second operand 47 states and 2774 transitions. [2023-08-24 09:52:24,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1576 transitions, 31440 flow [2023-08-24 09:52:26,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1576 transitions, 30170 flow, removed 572 selfloop flow, removed 17 redundant places. [2023-08-24 09:52:26,225 INFO L231 Difference]: Finished difference. Result has 476 places, 1158 transitions, 22728 flow [2023-08-24 09:52:26,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=16563, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=22728, PETRI_PLACES=476, PETRI_TRANSITIONS=1158} [2023-08-24 09:52:26,226 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-08-24 09:52:26,226 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1158 transitions, 22728 flow [2023-08-24 09:52:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:26,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:26,226 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:26,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:26,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:26,431 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 09:52:26,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 893803406, now seen corresponding path program 32 times [2023-08-24 09:52:26,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77918302] [2023-08-24 09:52:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:26,713 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 09:52:26,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77918302] [2023-08-24 09:52:26,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77918302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214315036] [2023-08-24 09:52:26,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:52:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:26,715 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 09:52:26,716 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 09:52:26,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:52:26,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:26,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 09:52:26,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:26,924 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 09:52:26,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:27,107 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 09:52:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214315036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:27,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:27,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-08-24 09:52:27,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23154574] [2023-08-24 09:52:27,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:27,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:52:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:52:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:52:27,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 146 [2023-08-24 09:52:27,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1158 transitions, 22728 flow. Second operand has 27 states, 27 states have (on average 51.77777777777778) internal successors, (1398), 27 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:27,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:27,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 146 [2023-08-24 09:52:27,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:30,240 INFO L124 PetriNetUnfolderBase]: 3406/5679 cut-off events. [2023-08-24 09:52:30,240 INFO L125 PetriNetUnfolderBase]: For 213645/213645 co-relation queries the response was YES. [2023-08-24 09:52:30,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61639 conditions, 5679 events. 3406/5679 cut-off events. For 213645/213645 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 36454 event pairs, 51 based on Foata normal form. 18/5697 useless extension candidates. Maximal degree in co-relation 61474. Up to 3302 conditions per place. [2023-08-24 09:52:30,301 INFO L140 encePairwiseOnDemand]: 137/146 looper letters, 754 selfloop transitions, 662 changer transitions 243/1659 dead transitions. [2023-08-24 09:52:30,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1659 transitions, 37225 flow [2023-08-24 09:52:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 09:52:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 09:52:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2585 transitions. [2023-08-24 09:52:30,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688641552511416 [2023-08-24 09:52:30,303 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2585 transitions. [2023-08-24 09:52:30,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2585 transitions. [2023-08-24 09:52:30,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:30,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2585 transitions. [2023-08-24 09:52:30,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 53.854166666666664) internal successors, (2585), 48 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:30,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:30,309 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:30,309 INFO L175 Difference]: Start difference. First operand has 476 places, 1158 transitions, 22728 flow. Second operand 48 states and 2585 transitions. [2023-08-24 09:52:30,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1659 transitions, 37225 flow [2023-08-24 09:52:32,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1659 transitions, 32816 flow, removed 2007 selfloop flow, removed 36 redundant places. [2023-08-24 09:52:32,150 INFO L231 Difference]: Finished difference. Result has 481 places, 1334 transitions, 27000 flow [2023-08-24 09:52:32,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=19843, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=27000, PETRI_PLACES=481, PETRI_TRANSITIONS=1334} [2023-08-24 09:52:32,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 461 predicate places. [2023-08-24 09:52:32,151 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1334 transitions, 27000 flow [2023-08-24 09:52:32,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 51.77777777777778) internal successors, (1398), 27 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:32,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:32,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:32,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 09:52:32,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 09:52:32,352 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 09:52:32,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash -639378736, now seen corresponding path program 33 times [2023-08-24 09:52:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:32,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193177189] [2023-08-24 09:52:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:32,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193177189] [2023-08-24 09:52:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193177189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423155758] [2023-08-24 09:52:32,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:52:32,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:32,615 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 09:52:32,617 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 09:52:32,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:52:32,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:32,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:52:32,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:32,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423155758] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:33,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:33,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 09:52:33,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859400782] [2023-08-24 09:52:33,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:33,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 09:52:33,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:33,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 09:52:33,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-24 09:52:33,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:33,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1334 transitions, 27000 flow. Second operand has 31 states, 31 states have (on average 56.54838709677419) internal successors, (1753), 31 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:33,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:33,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:33,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:36,515 INFO L124 PetriNetUnfolderBase]: 3357/5598 cut-off events. [2023-08-24 09:52:36,515 INFO L125 PetriNetUnfolderBase]: For 194030/194030 co-relation queries the response was YES. [2023-08-24 09:52:36,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59975 conditions, 5598 events. 3357/5598 cut-off events. For 194030/194030 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35796 event pairs, 51 based on Foata normal form. 14/5610 useless extension candidates. Maximal degree in co-relation 59788. Up to 2260 conditions per place. [2023-08-24 09:52:36,576 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 851 selfloop transitions, 546 changer transitions 206/1603 dead transitions. [2023-08-24 09:52:36,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1603 transitions, 35942 flow [2023-08-24 09:52:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 09:52:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 09:52:36,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2599 transitions. [2023-08-24 09:52:36,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045765877957659 [2023-08-24 09:52:36,578 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2599 transitions. [2023-08-24 09:52:36,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2599 transitions. [2023-08-24 09:52:36,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:36,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2599 transitions. [2023-08-24 09:52:36,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.06818181818182) internal successors, (2599), 44 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:36,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:36,585 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:36,585 INFO L175 Difference]: Start difference. First operand has 481 places, 1334 transitions, 27000 flow. Second operand 44 states and 2599 transitions. [2023-08-24 09:52:36,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1603 transitions, 35942 flow [2023-08-24 09:52:38,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1603 transitions, 32939 flow, removed 1390 selfloop flow, removed 38 redundant places. [2023-08-24 09:52:38,530 INFO L231 Difference]: Finished difference. Result has 476 places, 1278 transitions, 25463 flow [2023-08-24 09:52:38,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=24678, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25463, PETRI_PLACES=476, PETRI_TRANSITIONS=1278} [2023-08-24 09:52:38,531 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-08-24 09:52:38,532 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1278 transitions, 25463 flow [2023-08-24 09:52:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.54838709677419) internal successors, (1753), 31 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:38,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:38,532 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:38,538 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 09:52:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 09:52:38,737 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 09:52:38,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1245251294, now seen corresponding path program 34 times [2023-08-24 09:52:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634964736] [2023-08-24 09:52:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634964736] [2023-08-24 09:52:38,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634964736] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29877510] [2023-08-24 09:52:38,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:52:38,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:38,983 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 09:52:38,985 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 09:52:39,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:52:39,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:39,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:52:39,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:39,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:39,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29877510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:39,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:39,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 09:52:39,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821378396] [2023-08-24 09:52:39,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:39,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 09:52:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 09:52:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 09:52:39,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:39,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1278 transitions, 25463 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:39,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:39,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:39,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:43,198 INFO L124 PetriNetUnfolderBase]: 3437/5987 cut-off events. [2023-08-24 09:52:43,198 INFO L125 PetriNetUnfolderBase]: For 177389/177389 co-relation queries the response was YES. [2023-08-24 09:52:43,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62238 conditions, 5987 events. 3437/5987 cut-off events. For 177389/177389 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41116 event pairs, 41 based on Foata normal form. 21/6006 useless extension candidates. Maximal degree in co-relation 61996. Up to 2448 conditions per place. [2023-08-24 09:52:43,270 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 823 selfloop transitions, 861 changer transitions 67/1751 dead transitions. [2023-08-24 09:52:43,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1751 transitions, 39104 flow [2023-08-24 09:52:43,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-24 09:52:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-24 09:52:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3595 transitions. [2023-08-24 09:52:43,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40366045362676845 [2023-08-24 09:52:43,273 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3595 transitions. [2023-08-24 09:52:43,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3595 transitions. [2023-08-24 09:52:43,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:43,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3595 transitions. [2023-08-24 09:52:43,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.9344262295082) internal successors, (3595), 61 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:43,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 146.0) internal successors, (9052), 62 states have internal predecessors, (9052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:43,283 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 146.0) internal successors, (9052), 62 states have internal predecessors, (9052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:43,283 INFO L175 Difference]: Start difference. First operand has 476 places, 1278 transitions, 25463 flow. Second operand 61 states and 3595 transitions. [2023-08-24 09:52:43,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1751 transitions, 39104 flow [2023-08-24 09:52:45,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1751 transitions, 37743 flow, removed 542 selfloop flow, removed 34 redundant places. [2023-08-24 09:52:45,289 INFO L231 Difference]: Finished difference. Result has 509 places, 1511 transitions, 33167 flow [2023-08-24 09:52:45,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=24548, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=33167, PETRI_PLACES=509, PETRI_TRANSITIONS=1511} [2023-08-24 09:52:45,290 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 489 predicate places. [2023-08-24 09:52:45,290 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1511 transitions, 33167 flow [2023-08-24 09:52:45,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:45,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:45,291 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:45,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 09:52:45,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 09:52:45,491 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 09:52:45,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1217545664, now seen corresponding path program 35 times [2023-08-24 09:52:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:45,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161240382] [2023-08-24 09:52:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:45,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161240382] [2023-08-24 09:52:45,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161240382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:45,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954788856] [2023-08-24 09:52:45,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:52:45,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:45,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:45,746 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 09:52:45,748 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 09:52:45,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 09:52:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:45,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:52:45,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:46,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:46,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954788856] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:46,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:46,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 09:52:46,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340045641] [2023-08-24 09:52:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:46,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 09:52:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 09:52:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 09:52:46,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:46,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1511 transitions, 33167 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:46,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:46,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:46,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:50,468 INFO L124 PetriNetUnfolderBase]: 3328/5715 cut-off events. [2023-08-24 09:52:50,469 INFO L125 PetriNetUnfolderBase]: For 168575/168575 co-relation queries the response was YES. [2023-08-24 09:52:50,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61761 conditions, 5715 events. 3328/5715 cut-off events. For 168575/168575 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38053 event pairs, 43 based on Foata normal form. 30/5741 useless extension candidates. Maximal degree in co-relation 61589. Up to 2444 conditions per place. [2023-08-24 09:52:50,528 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 751 selfloop transitions, 798 changer transitions 149/1698 dead transitions. [2023-08-24 09:52:50,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1698 transitions, 40021 flow [2023-08-24 09:52:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 09:52:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 09:52:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2947 transitions. [2023-08-24 09:52:50,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036986301369863 [2023-08-24 09:52:50,531 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2947 transitions. [2023-08-24 09:52:50,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2947 transitions. [2023-08-24 09:52:50,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:50,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2947 transitions. [2023-08-24 09:52:50,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 58.94) internal successors, (2947), 50 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:50,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 146.0) internal successors, (7446), 51 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:50,537 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 146.0) internal successors, (7446), 51 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:50,537 INFO L175 Difference]: Start difference. First operand has 509 places, 1511 transitions, 33167 flow. Second operand 50 states and 2947 transitions. [2023-08-24 09:52:50,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1698 transitions, 40021 flow [2023-08-24 09:52:52,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1698 transitions, 38490 flow, removed 577 selfloop flow, removed 33 redundant places. [2023-08-24 09:52:52,596 INFO L231 Difference]: Finished difference. Result has 522 places, 1428 transitions, 32621 flow [2023-08-24 09:52:52,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=31675, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=773, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=32621, PETRI_PLACES=522, PETRI_TRANSITIONS=1428} [2023-08-24 09:52:52,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 502 predicate places. [2023-08-24 09:52:52,597 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1428 transitions, 32621 flow [2023-08-24 09:52:52,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:52,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:52:52,598 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:52:52,628 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 09:52:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:52,798 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 09:52:52,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:52:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1137780526, now seen corresponding path program 36 times [2023-08-24 09:52:52,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:52:52,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866684427] [2023-08-24 09:52:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:52:52,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:52:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:52:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:53,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:52:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866684427] [2023-08-24 09:52:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866684427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:52:53,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878059322] [2023-08-24 09:52:53,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:52:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:52:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:52:53,054 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 09:52:53,055 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 09:52:53,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 09:52:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:52:53,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:52:53,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:52:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:53,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:52:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:52:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878059322] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:52:53,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:52:53,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 09:52:53,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525829586] [2023-08-24 09:52:53,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:52:53,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:52:53,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:52:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:52:53,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:52:53,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:52:53,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1428 transitions, 32621 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:52:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:52:53,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:52:57,118 INFO L124 PetriNetUnfolderBase]: 3898/6402 cut-off events. [2023-08-24 09:52:57,118 INFO L125 PetriNetUnfolderBase]: For 208066/208066 co-relation queries the response was YES. [2023-08-24 09:52:57,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75911 conditions, 6402 events. 3898/6402 cut-off events. For 208066/208066 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40680 event pairs, 43 based on Foata normal form. 13/6411 useless extension candidates. Maximal degree in co-relation 75743. Up to 2783 conditions per place. [2023-08-24 09:52:57,202 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 840 selfloop transitions, 921 changer transitions 277/2038 dead transitions. [2023-08-24 09:52:57,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 2038 transitions, 53642 flow [2023-08-24 09:52:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 09:52:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 09:52:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2997 transitions. [2023-08-24 09:52:57,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024979854955681 [2023-08-24 09:52:57,204 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2997 transitions. [2023-08-24 09:52:57,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2997 transitions. [2023-08-24 09:52:57,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:52:57,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2997 transitions. [2023-08-24 09:52:57,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.76470588235294) internal successors, (2997), 51 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:57,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:57,210 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:52:57,210 INFO L175 Difference]: Start difference. First operand has 522 places, 1428 transitions, 32621 flow. Second operand 51 states and 2997 transitions. [2023-08-24 09:52:57,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 2038 transitions, 53642 flow [2023-08-24 09:53:00,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2038 transitions, 50873 flow, removed 871 selfloop flow, removed 40 redundant places. [2023-08-24 09:53:00,091 INFO L231 Difference]: Finished difference. Result has 541 places, 1641 transitions, 41134 flow [2023-08-24 09:53:00,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=30735, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=41134, PETRI_PLACES=541, PETRI_TRANSITIONS=1641} [2023-08-24 09:53:00,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 521 predicate places. [2023-08-24 09:53:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1641 transitions, 41134 flow [2023-08-24 09:53:00,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:00,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:53:00,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:53:00,098 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 09:53:00,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 09:53:00,297 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 09:53:00,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:53:00,298 INFO L85 PathProgramCache]: Analyzing trace with hash -758524900, now seen corresponding path program 37 times [2023-08-24 09:53:00,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:53:00,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143289487] [2023-08-24 09:53:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:53:00,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:53:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:53:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:00,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:53:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143289487] [2023-08-24 09:53:00,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143289487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:53:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30372004] [2023-08-24 09:53:00,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:53:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:53:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:53:00,473 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 09:53:00,476 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 09:53:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:53:00,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:53:00,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:53:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:00,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:53:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:00,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30372004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:53:00,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:53:00,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 09:53:00,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611631592] [2023-08-24 09:53:00,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:53:00,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:53:00,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:53:00,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:53:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:53:00,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:53:00,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1641 transitions, 41134 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:00,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:53:00,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:53:00,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:53:05,407 INFO L124 PetriNetUnfolderBase]: 4410/7153 cut-off events. [2023-08-24 09:53:05,407 INFO L125 PetriNetUnfolderBase]: For 277514/277514 co-relation queries the response was YES. [2023-08-24 09:53:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86974 conditions, 7153 events. 4410/7153 cut-off events. For 277514/277514 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45118 event pairs, 33 based on Foata normal form. 4/7153 useless extension candidates. Maximal degree in co-relation 86687. Up to 4591 conditions per place. [2023-08-24 09:53:05,498 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1571 selfloop transitions, 405 changer transitions 134/2110 dead transitions. [2023-08-24 09:53:05,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2110 transitions, 54677 flow [2023-08-24 09:53:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 09:53:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 09:53:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2256 transitions. [2023-08-24 09:53:05,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663302090843545 [2023-08-24 09:53:05,500 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2256 transitions. [2023-08-24 09:53:05,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2256 transitions. [2023-08-24 09:53:05,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:53:05,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2256 transitions. [2023-08-24 09:53:05,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.36842105263158) internal successors, (2256), 38 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:05,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:05,504 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:05,504 INFO L175 Difference]: Start difference. First operand has 541 places, 1641 transitions, 41134 flow. Second operand 38 states and 2256 transitions. [2023-08-24 09:53:05,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2110 transitions, 54677 flow [2023-08-24 09:53:09,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2110 transitions, 50146 flow, removed 2021 selfloop flow, removed 33 redundant places. [2023-08-24 09:53:09,221 INFO L231 Difference]: Finished difference. Result has 540 places, 1826 transitions, 42231 flow [2023-08-24 09:53:09,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=36953, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=42231, PETRI_PLACES=540, PETRI_TRANSITIONS=1826} [2023-08-24 09:53:09,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-24 09:53:09,223 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1826 transitions, 42231 flow [2023-08-24 09:53:09,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:09,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:53:09,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:53:09,228 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 09:53:09,424 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,SelfDestructingSolverStorable38 [2023-08-24 09:53:09,425 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 09:53:09,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:53:09,425 INFO L85 PathProgramCache]: Analyzing trace with hash -934752458, now seen corresponding path program 38 times [2023-08-24 09:53:09,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:53:09,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115648805] [2023-08-24 09:53:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:53:09,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:53:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:53:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:09,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:53:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115648805] [2023-08-24 09:53:09,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115648805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:53:09,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924927376] [2023-08-24 09:53:09,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:53:09,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:53:09,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:53:09,641 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 09:53:09,643 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 09:53:09,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:53:09,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:53:09,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:53:09,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:53:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:09,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:53:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924927376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:53:10,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:53:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-24 09:53:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824556765] [2023-08-24 09:53:10,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:53:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 09:53:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:53:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 09:53:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-08-24 09:53:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:53:10,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1826 transitions, 42231 flow. Second operand has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:10,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:53:10,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:53:10,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:53:15,754 INFO L124 PetriNetUnfolderBase]: 5411/8789 cut-off events. [2023-08-24 09:53:15,754 INFO L125 PetriNetUnfolderBase]: For 376619/376619 co-relation queries the response was YES. [2023-08-24 09:53:15,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109521 conditions, 8789 events. 5411/8789 cut-off events. For 376619/376619 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 57227 event pairs, 41 based on Foata normal form. 21/8808 useless extension candidates. Maximal degree in co-relation 109240. Up to 5605 conditions per place. [2023-08-24 09:53:15,860 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1584 selfloop transitions, 541 changer transitions 499/2624 dead transitions. [2023-08-24 09:53:15,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 2624 transitions, 69634 flow [2023-08-24 09:53:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 09:53:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 09:53:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2995 transitions. [2023-08-24 09:53:15,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40222938490464677 [2023-08-24 09:53:15,863 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2995 transitions. [2023-08-24 09:53:15,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2995 transitions. [2023-08-24 09:53:15,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:53:15,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2995 transitions. [2023-08-24 09:53:15,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.72549019607843) internal successors, (2995), 51 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:15,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:15,868 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:15,868 INFO L175 Difference]: Start difference. First operand has 540 places, 1826 transitions, 42231 flow. Second operand 51 states and 2995 transitions. [2023-08-24 09:53:15,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 2624 transitions, 69634 flow [2023-08-24 09:53:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2624 transitions, 62661 flow, removed 3430 selfloop flow, removed 25 redundant places. [2023-08-24 09:53:20,606 INFO L231 Difference]: Finished difference. Result has 581 places, 2015 transitions, 48660 flow [2023-08-24 09:53:20,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=40684, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=48660, PETRI_PLACES=581, PETRI_TRANSITIONS=2015} [2023-08-24 09:53:20,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-08-24 09:53:20,608 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 2015 transitions, 48660 flow [2023-08-24 09:53:20,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:20,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:53:20,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:53:20,613 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 09:53:20,813 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,SelfDestructingSolverStorable39 [2023-08-24 09:53:20,813 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 09:53:20,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:53:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1225309386, now seen corresponding path program 39 times [2023-08-24 09:53:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:53:20,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754278773] [2023-08-24 09:53:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:53:20,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:53:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:53:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:21,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:53:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754278773] [2023-08-24 09:53:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754278773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:53:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654332336] [2023-08-24 09:53:21,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:53:21,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:53:21,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:53:21,032 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 09:53:21,034 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 09:53:21,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 09:53:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:53:21,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 09:53:21,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:53:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:21,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:53:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:21,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654332336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:53:21,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:53:21,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 09:53:21,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484443388] [2023-08-24 09:53:21,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:53:21,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:53:21,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:53:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:53:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:53:21,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:53:21,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 2015 transitions, 48660 flow. Second operand has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:21,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:53:21,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:53:21,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:53:28,697 INFO L124 PetriNetUnfolderBase]: 6437/10435 cut-off events. [2023-08-24 09:53:28,697 INFO L125 PetriNetUnfolderBase]: For 524068/524068 co-relation queries the response was YES. [2023-08-24 09:53:28,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138716 conditions, 10435 events. 6437/10435 cut-off events. For 524068/524068 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 68480 event pairs, 45 based on Foata normal form. 21/10452 useless extension candidates. Maximal degree in co-relation 138531. Up to 6043 conditions per place. [2023-08-24 09:53:28,977 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1752 selfloop transitions, 897 changer transitions 246/2895 dead transitions. [2023-08-24 09:53:28,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 2895 transitions, 78221 flow [2023-08-24 09:53:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 09:53:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 09:53:28,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3126 transitions. [2023-08-24 09:53:28,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403980356681313 [2023-08-24 09:53:28,979 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3126 transitions. [2023-08-24 09:53:28,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3126 transitions. [2023-08-24 09:53:28,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:53:28,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3126 transitions. [2023-08-24 09:53:28,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 58.9811320754717) internal successors, (3126), 53 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:28,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 146.0) internal successors, (7884), 54 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:28,985 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 146.0) internal successors, (7884), 54 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:28,985 INFO L175 Difference]: Start difference. First operand has 581 places, 2015 transitions, 48660 flow. Second operand 53 states and 3126 transitions. [2023-08-24 09:53:28,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 2895 transitions, 78221 flow [2023-08-24 09:53:36,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 2895 transitions, 69157 flow, removed 4324 selfloop flow, removed 28 redundant places. [2023-08-24 09:53:36,465 INFO L231 Difference]: Finished difference. Result has 609 places, 2507 transitions, 60167 flow [2023-08-24 09:53:36,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=44803, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=60167, PETRI_PLACES=609, PETRI_TRANSITIONS=2507} [2023-08-24 09:53:36,467 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 589 predicate places. [2023-08-24 09:53:36,467 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 2507 transitions, 60167 flow [2023-08-24 09:53:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:36,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:53:36,467 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:53:36,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-24 09:53:36,667 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,SelfDestructingSolverStorable40 [2023-08-24 09:53:36,668 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 09:53:36,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:53:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1776174790, now seen corresponding path program 40 times [2023-08-24 09:53:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:53:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320674275] [2023-08-24 09:53:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:53:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:53:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:53:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:53:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320674275] [2023-08-24 09:53:36,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320674275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:53:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525016503] [2023-08-24 09:53:36,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:53:36,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:53:36,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:53:36,893 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:53:36,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 09:53:36,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:53:36,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:53:36,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:53:36,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:53:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:37,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:53:37,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:53:37,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525016503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:53:37,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:53:37,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 09:53:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767499451] [2023-08-24 09:53:37,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:53:37,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:53:37,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:53:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:53:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:53:37,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:53:37,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 2507 transitions, 60167 flow. Second operand has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:37,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:53:37,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:53:37,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:53:49,066 INFO L124 PetriNetUnfolderBase]: 9571/15241 cut-off events. [2023-08-24 09:53:49,066 INFO L125 PetriNetUnfolderBase]: For 727649/727649 co-relation queries the response was YES. [2023-08-24 09:53:49,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204352 conditions, 15241 events. 9571/15241 cut-off events. For 727649/727649 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 104832 event pairs, 47 based on Foata normal form. 15/15252 useless extension candidates. Maximal degree in co-relation 204157. Up to 6779 conditions per place. [2023-08-24 09:53:49,293 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2039 selfloop transitions, 2175 changer transitions 92/4306 dead transitions. [2023-08-24 09:53:49,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 4306 transitions, 116205 flow [2023-08-24 09:53:49,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-24 09:53:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-24 09:53:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3668 transitions. [2023-08-24 09:53:49,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052143172779496 [2023-08-24 09:53:49,296 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3668 transitions. [2023-08-24 09:53:49,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3668 transitions. [2023-08-24 09:53:49,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:53:49,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3668 transitions. [2023-08-24 09:53:49,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 59.16129032258065) internal successors, (3668), 62 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:49,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 146.0) internal successors, (9198), 63 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:49,303 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 146.0) internal successors, (9198), 63 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:53:49,304 INFO L175 Difference]: Start difference. First operand has 609 places, 2507 transitions, 60167 flow. Second operand 62 states and 3668 transitions. [2023-08-24 09:53:49,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 4306 transitions, 116205 flow [2023-08-24 09:54:01,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 4306 transitions, 111924 flow, removed 2075 selfloop flow, removed 23 redundant places. [2023-08-24 09:54:01,350 INFO L231 Difference]: Finished difference. Result has 654 places, 3837 transitions, 100267 flow [2023-08-24 09:54:01,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=56404, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=100267, PETRI_PLACES=654, PETRI_TRANSITIONS=3837} [2023-08-24 09:54:01,352 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 634 predicate places. [2023-08-24 09:54:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 3837 transitions, 100267 flow [2023-08-24 09:54:01,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:54:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:54:01,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 09:54:01,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:54:01,558 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 09:54:01,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:54:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 709461436, now seen corresponding path program 41 times [2023-08-24 09:54:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:54:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154886739] [2023-08-24 09:54:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:54:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:54:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:54:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:54:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154886739] [2023-08-24 09:54:01,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154886739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:54:01,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029666067] [2023-08-24 09:54:01,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:54:01,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:54:01,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:54:01,849 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:54:01,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 09:54:01,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 09:54:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:54:01,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:54:01,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:54:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:02,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:54:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029666067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:54:02,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:54:02,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 09:54:02,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120662192] [2023-08-24 09:54:02,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:54:02,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:54:02,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:54:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:54:02,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:54:02,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:54:02,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 3837 transitions, 100267 flow. Second operand has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:02,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:54:02,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:54:02,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:54:21,270 INFO L124 PetriNetUnfolderBase]: 11830/18670 cut-off events. [2023-08-24 09:54:21,270 INFO L125 PetriNetUnfolderBase]: For 979564/979564 co-relation queries the response was YES. [2023-08-24 09:54:21,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270447 conditions, 18670 events. 11830/18670 cut-off events. For 979564/979564 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 129930 event pairs, 55 based on Foata normal form. 15/18683 useless extension candidates. Maximal degree in co-relation 270245. Up to 9221 conditions per place. [2023-08-24 09:54:21,588 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1976 selfloop transitions, 2803 changer transitions 312/5091 dead transitions. [2023-08-24 09:54:21,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 5091 transitions, 155459 flow [2023-08-24 09:54:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 09:54:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 09:54:21,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3367 transitions. [2023-08-24 09:54:21,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40459024273011296 [2023-08-24 09:54:21,591 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3367 transitions. [2023-08-24 09:54:21,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3367 transitions. [2023-08-24 09:54:21,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:54:21,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3367 transitions. [2023-08-24 09:54:21,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 59.07017543859649) internal successors, (3367), 57 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:21,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:21,598 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:21,598 INFO L175 Difference]: Start difference. First operand has 654 places, 3837 transitions, 100267 flow. Second operand 57 states and 3367 transitions. [2023-08-24 09:54:21,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 5091 transitions, 155459 flow [2023-08-24 09:54:44,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 5091 transitions, 143558 flow, removed 5776 selfloop flow, removed 35 redundant places. [2023-08-24 09:54:44,719 INFO L231 Difference]: Finished difference. Result has 682 places, 4564 transitions, 132031 flow [2023-08-24 09:54:44,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=95902, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=132031, PETRI_PLACES=682, PETRI_TRANSITIONS=4564} [2023-08-24 09:54:44,721 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 662 predicate places. [2023-08-24 09:54:44,722 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 4564 transitions, 132031 flow [2023-08-24 09:54:44,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:44,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:54:44,722 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:54:44,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 09:54:44,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:54:44,923 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 09:54:44,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:54:44,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1789074614, now seen corresponding path program 42 times [2023-08-24 09:54:44,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:54:44,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987792821] [2023-08-24 09:54:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:54:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:54:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:54:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:45,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:54:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987792821] [2023-08-24 09:54:45,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987792821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:54:45,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472208817] [2023-08-24 09:54:45,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:54:45,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:54:45,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:54:45,132 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:54:45,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 09:54:45,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 09:54:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:54:45,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:54:45,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:54:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:45,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:54:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:54:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472208817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:54:45,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:54:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 09:54:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935727514] [2023-08-24 09:54:45,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:54:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:54:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:54:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:54:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:54:45,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:54:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 4564 transitions, 132031 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:54:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:54:45,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:54:45,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:55:12,583 INFO L124 PetriNetUnfolderBase]: 13239/20783 cut-off events. [2023-08-24 09:55:12,584 INFO L125 PetriNetUnfolderBase]: For 955022/955022 co-relation queries the response was YES. [2023-08-24 09:55:12,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303815 conditions, 20783 events. 13239/20783 cut-off events. For 955022/955022 co-relation queries the response was YES. Maximal size of possible extension queue 1114. Compared 145164 event pairs, 51 based on Foata normal form. 7/20786 useless extension candidates. Maximal degree in co-relation 303604. Up to 10297 conditions per place. [2023-08-24 09:55:13,055 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1615 selfloop transitions, 3280 changer transitions 691/5586 dead transitions. [2023-08-24 09:55:13,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 5586 transitions, 176670 flow [2023-08-24 09:55:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 09:55:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 09:55:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3070 transitions. [2023-08-24 09:55:13,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40437302423603794 [2023-08-24 09:55:13,057 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3070 transitions. [2023-08-24 09:55:13,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3070 transitions. [2023-08-24 09:55:13,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:55:13,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3070 transitions. [2023-08-24 09:55:13,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 59.03846153846154) internal successors, (3070), 52 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:55:13,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 146.0) internal successors, (7738), 53 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:55:13,063 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 146.0) internal successors, (7738), 53 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:55:13,063 INFO L175 Difference]: Start difference. First operand has 682 places, 4564 transitions, 132031 flow. Second operand 52 states and 3070 transitions. [2023-08-24 09:55:13,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 5586 transitions, 176670 flow [2023-08-24 09:55:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 5586 transitions, 162972 flow, removed 6611 selfloop flow, removed 30 redundant places. [2023-08-24 09:55:41,786 INFO L231 Difference]: Finished difference. Result has 706 places, 4713 transitions, 138804 flow [2023-08-24 09:55:41,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=122194, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=138804, PETRI_PLACES=706, PETRI_TRANSITIONS=4713} [2023-08-24 09:55:41,788 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 686 predicate places. [2023-08-24 09:55:41,789 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 4713 transitions, 138804 flow [2023-08-24 09:55:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:55:41,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:55:41,789 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:55:41,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-24 09:55:41,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-24 09:55:41,990 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:55:41,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:55:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1257179218, now seen corresponding path program 43 times [2023-08-24 09:55:41,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:55:41,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800341462] [2023-08-24 09:55:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:55:41,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:55:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:55:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:55:42,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:55:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800341462] [2023-08-24 09:55:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800341462] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:55:42,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511265055] [2023-08-24 09:55:42,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:55:42,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:55:42,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:55:42,318 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:55:42,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 09:55:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:55:42,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 09:55:42,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:55:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:55:42,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:55:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:55:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511265055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:55:42,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:55:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-24 09:55:42,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427337264] [2023-08-24 09:55:42,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:55:42,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 09:55:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:55:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 09:55:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 09:55:42,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:55:42,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 4713 transitions, 138804 flow. Second operand has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:55:42,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:55:42,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:55:42,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:56:11,816 INFO L124 PetriNetUnfolderBase]: 13127/21242 cut-off events. [2023-08-24 09:56:11,816 INFO L125 PetriNetUnfolderBase]: For 928401/928401 co-relation queries the response was YES. [2023-08-24 09:56:12,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305671 conditions, 21242 events. 13127/21242 cut-off events. For 928401/928401 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 156029 event pairs, 119 based on Foata normal form. 12/21252 useless extension candidates. Maximal degree in co-relation 305456. Up to 15800 conditions per place. [2023-08-24 09:56:12,257 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 4099 selfloop transitions, 1177 changer transitions 139/5415 dead transitions. [2023-08-24 09:56:12,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 5415 transitions, 167369 flow [2023-08-24 09:56:12,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 09:56:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 09:56:12,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2898 transitions. [2023-08-24 09:56:12,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050880626223092 [2023-08-24 09:56:12,259 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2898 transitions. [2023-08-24 09:56:12,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2898 transitions. [2023-08-24 09:56:12,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:56:12,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2898 transitions. [2023-08-24 09:56:12,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 59.142857142857146) internal successors, (2898), 49 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:56:12,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:56:12,265 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:56:12,265 INFO L175 Difference]: Start difference. First operand has 706 places, 4713 transitions, 138804 flow. Second operand 49 states and 2898 transitions. [2023-08-24 09:56:12,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 5415 transitions, 167369 flow [2023-08-24 09:56:38,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 5415 transitions, 164448 flow, removed 938 selfloop flow, removed 37 redundant places. [2023-08-24 09:56:38,794 INFO L231 Difference]: Finished difference. Result has 711 places, 5076 transitions, 149900 flow [2023-08-24 09:56:38,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=136157, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=819, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=149900, PETRI_PLACES=711, PETRI_TRANSITIONS=5076} [2023-08-24 09:56:38,798 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 691 predicate places. [2023-08-24 09:56:38,798 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 5076 transitions, 149900 flow [2023-08-24 09:56:38,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:56:38,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:56:38,798 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:56:38,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 09:56:39,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-24 09:56:39,003 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:56:39,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:56:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1236276169, now seen corresponding path program 44 times [2023-08-24 09:56:39,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:56:39,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410507595] [2023-08-24 09:56:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:56:39,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:56:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:56:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:56:39,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:56:39,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410507595] [2023-08-24 09:56:39,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410507595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:56:39,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835361987] [2023-08-24 09:56:39,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:56:39,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:56:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:56:39,229 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:56:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 09:56:39,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:56:39,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:56:39,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 09:56:39,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:56:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:56:39,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:56:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:56:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835361987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:56:39,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:56:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-08-24 09:56:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129914615] [2023-08-24 09:56:39,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:56:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 09:56:39,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:56:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 09:56:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2023-08-24 09:56:39,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:56:39,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 5076 transitions, 149900 flow. Second operand has 30 states, 30 states have (on average 56.6) internal successors, (1698), 30 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:56:39,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:56:39,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:56:39,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:57:11,749 INFO L124 PetriNetUnfolderBase]: 13952/22680 cut-off events. [2023-08-24 09:57:11,749 INFO L125 PetriNetUnfolderBase]: For 994435/994435 co-relation queries the response was YES. [2023-08-24 09:57:12,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331922 conditions, 22680 events. 13952/22680 cut-off events. For 994435/994435 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 169087 event pairs, 41 based on Foata normal form. 19/22697 useless extension candidates. Maximal degree in co-relation 331703. Up to 13604 conditions per place. [2023-08-24 09:57:12,154 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 3779 selfloop transitions, 1539 changer transitions 413/5731 dead transitions. [2023-08-24 09:57:12,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 5731 transitions, 182748 flow [2023-08-24 09:57:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 09:57:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 09:57:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1715 transitions. [2023-08-24 09:57:12,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050543221539915 [2023-08-24 09:57:12,156 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1715 transitions. [2023-08-24 09:57:12,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1715 transitions. [2023-08-24 09:57:12,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:57:12,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1715 transitions. [2023-08-24 09:57:12,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 59.13793103448276) internal successors, (1715), 29 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:57:12,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:57:12,159 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:57:12,159 INFO L175 Difference]: Start difference. First operand has 711 places, 5076 transitions, 149900 flow. Second operand 29 states and 1715 transitions. [2023-08-24 09:57:12,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 5731 transitions, 182748 flow [2023-08-24 09:57:37,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 5731 transitions, 179664 flow, removed 1486 selfloop flow, removed 21 redundant places. [2023-08-24 09:57:37,327 INFO L231 Difference]: Finished difference. Result has 718 places, 5266 transitions, 160989 flow [2023-08-24 09:57:37,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=148175, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=160989, PETRI_PLACES=718, PETRI_TRANSITIONS=5266} [2023-08-24 09:57:37,331 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-08-24 09:57:37,331 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 5266 transitions, 160989 flow [2023-08-24 09:57:37,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.6) internal successors, (1698), 30 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:57:37,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:57:37,331 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:57:37,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 09:57:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-24 09:57:37,537 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:57:37,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:57:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash 570199397, now seen corresponding path program 45 times [2023-08-24 09:57:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:57:37,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208806517] [2023-08-24 09:57:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:57:37,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:57:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:57:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:57:37,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:57:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208806517] [2023-08-24 09:57:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208806517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:57:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451836695] [2023-08-24 09:57:37,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:57:37,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:57:37,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:57:37,780 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:57:37,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 09:57:37,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 09:57:37,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:57:37,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 09:57:37,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:57:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:57:38,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:57:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:57:38,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451836695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:57:38,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:57:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 33 [2023-08-24 09:57:38,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683154216] [2023-08-24 09:57:38,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:57:38,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 09:57:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:57:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 09:57:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 09:57:38,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:57:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 5266 transitions, 160989 flow. Second operand has 35 states, 35 states have (on average 56.48571428571429) internal successors, (1977), 35 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:57:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:57:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:57:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:58:25,434 INFO L124 PetriNetUnfolderBase]: 17968/29140 cut-off events. [2023-08-24 09:58:25,434 INFO L125 PetriNetUnfolderBase]: For 1270188/1270188 co-relation queries the response was YES. [2023-08-24 09:58:25,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441984 conditions, 29140 events. 17968/29140 cut-off events. For 1270188/1270188 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 225739 event pairs, 121 based on Foata normal form. 17/29153 useless extension candidates. Maximal degree in co-relation 441763. Up to 15401 conditions per place. [2023-08-24 09:58:26,165 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 3774 selfloop transitions, 3068 changer transitions 848/7690 dead transitions. [2023-08-24 09:58:26,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 7690 transitions, 257824 flow [2023-08-24 09:58:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 09:58:26,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 09:58:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3366 transitions. [2023-08-24 09:58:26,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40447007930785867 [2023-08-24 09:58:26,168 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3366 transitions. [2023-08-24 09:58:26,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3366 transitions. [2023-08-24 09:58:26,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:58:26,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3366 transitions. [2023-08-24 09:58:26,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 59.05263157894737) internal successors, (3366), 57 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:58:26,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:58:26,174 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:58:26,174 INFO L175 Difference]: Start difference. First operand has 718 places, 5266 transitions, 160989 flow. Second operand 57 states and 3366 transitions. [2023-08-24 09:58:26,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 7690 transitions, 257824 flow [2023-08-24 09:59:08,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 7690 transitions, 246476 flow, removed 3875 selfloop flow, removed 22 redundant places. [2023-08-24 09:59:08,217 INFO L231 Difference]: Finished difference. Result has 762 places, 6526 transitions, 209497 flow [2023-08-24 09:59:08,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=151232, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=209497, PETRI_PLACES=762, PETRI_TRANSITIONS=6526} [2023-08-24 09:59:08,221 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 742 predicate places. [2023-08-24 09:59:08,221 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 6526 transitions, 209497 flow [2023-08-24 09:59:08,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.48571428571429) internal successors, (1977), 35 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:59:08,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:59:08,222 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:59:08,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 09:59:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:59:08,427 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:59:08,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:59:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2065846847, now seen corresponding path program 46 times [2023-08-24 09:59:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:59:08,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092948706] [2023-08-24 09:59:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:59:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:59:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:59:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:59:08,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:59:08,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092948706] [2023-08-24 09:59:08,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092948706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:59:08,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048093659] [2023-08-24 09:59:08,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:59:08,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:59:08,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:59:08,684 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:59:08,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 09:59:08,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:59:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:59:08,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 09:59:08,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:59:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:59:08,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:59:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:59:09,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048093659] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:59:09,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:59:09,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-08-24 09:59:09,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968419778] [2023-08-24 09:59:09,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:59:09,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 09:59:09,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:59:09,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 09:59:09,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 09:59:09,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 09:59:09,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 6526 transitions, 209497 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:59:09,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:59:09,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 09:59:09,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:00:08,951 INFO L124 PetriNetUnfolderBase]: 16564/27134 cut-off events. [2023-08-24 10:00:08,952 INFO L125 PetriNetUnfolderBase]: For 1137502/1137502 co-relation queries the response was YES. [2023-08-24 10:00:09,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413191 conditions, 27134 events. 16564/27134 cut-off events. For 1137502/1137502 co-relation queries the response was YES. Maximal size of possible extension queue 1441. Compared 211174 event pairs, 81 based on Foata normal form. 19/27149 useless extension candidates. Maximal degree in co-relation 412961. Up to 13935 conditions per place. [2023-08-24 10:00:09,932 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2613 selfloop transitions, 3941 changer transitions 269/6823 dead transitions. [2023-08-24 10:00:09,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 6823 transitions, 232155 flow [2023-08-24 10:00:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 10:00:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 10:00:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2759 transitions. [2023-08-24 10:00:09,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402069367531332 [2023-08-24 10:00:09,935 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2759 transitions. [2023-08-24 10:00:09,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2759 transitions. [2023-08-24 10:00:09,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:00:09,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2759 transitions. [2023-08-24 10:00:09,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 58.702127659574465) internal successors, (2759), 47 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:00:09,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:00:09,942 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:00:09,942 INFO L175 Difference]: Start difference. First operand has 762 places, 6526 transitions, 209497 flow. Second operand 47 states and 2759 transitions. [2023-08-24 10:00:09,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 6823 transitions, 232155 flow [2023-08-24 10:00:49,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 6823 transitions, 221835 flow, removed 5021 selfloop flow, removed 24 redundant places. [2023-08-24 10:00:49,650 INFO L231 Difference]: Finished difference. Result has 785 places, 6429 transitions, 209048 flow [2023-08-24 10:00:49,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=199977, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=209048, PETRI_PLACES=785, PETRI_TRANSITIONS=6429} [2023-08-24 10:00:49,656 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 765 predicate places. [2023-08-24 10:00:49,656 INFO L495 AbstractCegarLoop]: Abstraction has has 785 places, 6429 transitions, 209048 flow [2023-08-24 10:00:49,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:00:49,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:00:49,657 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:00:49,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 10:00:49,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 10:00:49,863 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:00:49,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:00:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1416048416, now seen corresponding path program 47 times [2023-08-24 10:00:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:00:49,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722745890] [2023-08-24 10:00:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:00:49,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:00:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:00:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:00:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:00:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722745890] [2023-08-24 10:00:50,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722745890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:00:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88116799] [2023-08-24 10:00:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:00:50,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:00:50,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:00:50,114 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:00:50,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 10:00:50,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 10:00:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:00:50,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 10:00:50,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:00:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:00:50,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:00:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:00:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88116799] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:00:50,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:00:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 33 [2023-08-24 10:00:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013255748] [2023-08-24 10:00:50,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:00:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 10:00:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:00:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 10:00:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 10:00:50,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 10:00:50,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 6429 transitions, 209048 flow. Second operand has 35 states, 35 states have (on average 56.51428571428571) internal successors, (1978), 35 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:00:50,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:00:50,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 10:00:50,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:01:53,120 INFO L124 PetriNetUnfolderBase]: 16136/26824 cut-off events. [2023-08-24 10:01:53,120 INFO L125 PetriNetUnfolderBase]: For 1041585/1041585 co-relation queries the response was YES. [2023-08-24 10:01:53,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402895 conditions, 26824 events. 16136/26824 cut-off events. For 1041585/1041585 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 213094 event pairs, 81 based on Foata normal form. 19/26839 useless extension candidates. Maximal degree in co-relation 402664. Up to 13531 conditions per place. [2023-08-24 10:01:53,938 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2376 selfloop transitions, 4111 changer transitions 352/6839 dead transitions. [2023-08-24 10:01:53,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 6839 transitions, 236929 flow [2023-08-24 10:01:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 10:01:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 10:01:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2824 transitions. [2023-08-24 10:01:53,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029680365296804 [2023-08-24 10:01:53,941 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2824 transitions. [2023-08-24 10:01:53,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2824 transitions. [2023-08-24 10:01:53,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:01:53,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2824 transitions. [2023-08-24 10:01:53,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 58.833333333333336) internal successors, (2824), 48 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:01:53,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:01:53,949 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:01:53,949 INFO L175 Difference]: Start difference. First operand has 785 places, 6429 transitions, 209048 flow. Second operand 48 states and 2824 transitions. [2023-08-24 10:01:53,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 6839 transitions, 236929 flow [2023-08-24 10:02:29,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 6839 transitions, 234948 flow, removed 349 selfloop flow, removed 36 redundant places. [2023-08-24 10:02:29,298 INFO L231 Difference]: Finished difference. Result has 796 places, 6413 transitions, 219477 flow [2023-08-24 10:02:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=207213, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3917, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=219477, PETRI_PLACES=796, PETRI_TRANSITIONS=6413} [2023-08-24 10:02:29,302 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 776 predicate places. [2023-08-24 10:02:29,303 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 6413 transitions, 219477 flow [2023-08-24 10:02:29,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.51428571428571) internal successors, (1978), 35 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:02:29,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:02:29,303 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:02:29,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 10:02:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 10:02:29,505 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:02:29,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:02:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1925785359, now seen corresponding path program 48 times [2023-08-24 10:02:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:02:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366471944] [2023-08-24 10:02:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:02:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:02:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:02:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:02:29,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:02:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366471944] [2023-08-24 10:02:29,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366471944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:02:29,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527860502] [2023-08-24 10:02:29,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:02:29,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:02:29,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:02:29,758 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:02:29,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 10:02:29,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-24 10:02:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:02:29,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:02:29,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:02:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:02:30,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:02:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:02:30,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527860502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:02:30,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:02:30,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2023-08-24 10:02:30,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292456796] [2023-08-24 10:02:30,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:02:30,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 10:02:30,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:02:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 10:02:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 10:02:30,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 10:02:30,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 6413 transitions, 219477 flow. Second operand has 37 states, 37 states have (on average 56.486486486486484) internal successors, (2090), 37 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:02:30,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:02:30,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 10:02:30,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:03:36,834 INFO L124 PetriNetUnfolderBase]: 15420/25796 cut-off events. [2023-08-24 10:03:36,835 INFO L125 PetriNetUnfolderBase]: For 999673/999673 co-relation queries the response was YES. [2023-08-24 10:03:37,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398748 conditions, 25796 events. 15420/25796 cut-off events. For 999673/999673 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206085 event pairs, 81 based on Foata normal form. 47/25839 useless extension candidates. Maximal degree in co-relation 398519. Up to 12825 conditions per place. [2023-08-24 10:03:37,473 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1766 selfloop transitions, 44 changer transitions 5188/6998 dead transitions. [2023-08-24 10:03:37,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 6998 transitions, 256130 flow [2023-08-24 10:03:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 10:03:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 10:03:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2581 transitions. [2023-08-24 10:03:37,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40177459526774595 [2023-08-24 10:03:37,475 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2581 transitions. [2023-08-24 10:03:37,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2581 transitions. [2023-08-24 10:03:37,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:03:37,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2581 transitions. [2023-08-24 10:03:37,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 58.65909090909091) internal successors, (2581), 44 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:03:37,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:03:37,480 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:03:37,480 INFO L175 Difference]: Start difference. First operand has 796 places, 6413 transitions, 219477 flow. Second operand 44 states and 2581 transitions. [2023-08-24 10:03:37,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 6998 transitions, 256130 flow [2023-08-24 10:04:15,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 6998 transitions, 246250 flow, removed 3706 selfloop flow, removed 42 redundant places. [2023-08-24 10:04:15,452 INFO L231 Difference]: Finished difference. Result has 781 places, 1795 transitions, 42360 flow [2023-08-24 10:04:15,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=211450, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=42360, PETRI_PLACES=781, PETRI_TRANSITIONS=1795} [2023-08-24 10:04:15,456 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-08-24 10:04:15,456 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 1795 transitions, 42360 flow [2023-08-24 10:04:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 56.486486486486484) internal successors, (2090), 37 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:15,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:04:15,456 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:04:15,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-24 10:04:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 10:04:15,661 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:04:15,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:04:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash -181016459, now seen corresponding path program 49 times [2023-08-24 10:04:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:04:15,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272931071] [2023-08-24 10:04:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:04:15,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:04:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:04:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 10:04:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:04:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272931071] [2023-08-24 10:04:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272931071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:04:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009549965] [2023-08-24 10:04:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:04:15,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:04:15,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:04:15,884 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:04:15,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 10:04:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:04:15,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:04:15,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:04:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:04:16,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:04:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:04:16,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009549965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:04:16,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:04:16,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 34 [2023-08-24 10:04:16,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679892177] [2023-08-24 10:04:16,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:04:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 10:04:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:04:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 10:04:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 10:04:16,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 10:04:16,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 1795 transitions, 42360 flow. Second operand has 36 states, 36 states have (on average 56.5) internal successors, (2034), 36 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:16,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:04:16,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 10:04:16,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:04:22,675 INFO L124 PetriNetUnfolderBase]: 5269/8662 cut-off events. [2023-08-24 10:04:22,675 INFO L125 PetriNetUnfolderBase]: For 299688/299688 co-relation queries the response was YES. [2023-08-24 10:04:22,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109301 conditions, 8662 events. 5269/8662 cut-off events. For 299688/299688 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 56995 event pairs, 0 based on Foata normal form. 36/8694 useless extension candidates. Maximal degree in co-relation 109088. Up to 4531 conditions per place. [2023-08-24 10:04:22,801 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 302 selfloop transitions, 1610 changer transitions 216/2128 dead transitions. [2023-08-24 10:04:22,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 2128 transitions, 54044 flow [2023-08-24 10:04:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 10:04:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 10:04:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2630 transitions. [2023-08-24 10:04:22,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003044140030441 [2023-08-24 10:04:22,804 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2630 transitions. [2023-08-24 10:04:22,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2630 transitions. [2023-08-24 10:04:22,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:04:22,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2630 transitions. [2023-08-24 10:04:22,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 58.44444444444444) internal successors, (2630), 45 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:22,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 146.0) internal successors, (6716), 46 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:22,808 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 146.0) internal successors, (6716), 46 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:22,808 INFO L175 Difference]: Start difference. First operand has 781 places, 1795 transitions, 42360 flow. Second operand 45 states and 2630 transitions. [2023-08-24 10:04:22,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 2128 transitions, 54044 flow [2023-08-24 10:04:27,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 2128 transitions, 48848 flow, removed 2270 selfloop flow, removed 87 redundant places. [2023-08-24 10:04:27,745 INFO L231 Difference]: Finished difference. Result has 402 places, 1845 transitions, 44193 flow [2023-08-24 10:04:27,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=38369, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=44193, PETRI_PLACES=402, PETRI_TRANSITIONS=1845} [2023-08-24 10:04:27,746 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-08-24 10:04:27,746 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1845 transitions, 44193 flow [2023-08-24 10:04:27,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 56.5) internal successors, (2034), 36 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:27,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:04:27,747 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:04:27,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-24 10:04:27,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-24 10:04:27,948 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:04:27,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:04:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash -584291977, now seen corresponding path program 50 times [2023-08-24 10:04:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:04:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805982364] [2023-08-24 10:04:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:04:27,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:04:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:04:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:04:28,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:04:28,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805982364] [2023-08-24 10:04:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805982364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:04:28,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867150777] [2023-08-24 10:04:28,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:04:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:04:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:04:28,233 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:04:28,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 10:04:28,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:04:28,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:04:28,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 10:04:28,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:04:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:04:28,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:04:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:04:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867150777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:04:29,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:04:29,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 37 [2023-08-24 10:04:29,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512769398] [2023-08-24 10:04:29,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:04:29,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 10:04:29,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:04:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 10:04:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 10:04:29,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 10:04:29,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1845 transitions, 44193 flow. Second operand has 39 states, 39 states have (on average 56.46153846153846) internal successors, (2202), 39 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:04:29,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:04:29,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 10:04:29,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 10:04:32,490 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:04:32,490 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 10:04:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 10:04:32,506 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 10:04:32,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-08-24 10:04:32,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:04:32,707 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 55/146 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 58680 conditions, 4945 events (2864/4944 cut-off events. For 119978/119978 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 36378 event pairs, 3 based on Foata normal form. 0/5582 useless extension candidates. Maximal degree in co-relation 58508. Up to 2126 conditions per place.). [2023-08-24 10:04:32,709 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 10:04:32,709 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 10:04:32,709 INFO L445 BasicCegarLoop]: Path program histogram: [50, 1, 1] [2023-08-24 10:04:32,711 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:04:32,711 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:04:32,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:04:32 BasicIcfg [2023-08-24 10:04:32,713 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:04:32,713 INFO L158 Benchmark]: Toolchain (without parser) took 804565.86ms. Allocated memory was 362.8MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 338.7MB in the beginning and 6.0GB in the end (delta: -5.6GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-24 10:04:32,713 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 362.8MB. Free memory is still 340.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:04:32,713 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.01ms. Allocated memory is still 362.8MB. Free memory was 338.2MB in the beginning and 327.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 10:04:32,714 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.07ms. Allocated memory is still 362.8MB. Free memory was 327.7MB in the beginning and 326.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:04:32,714 INFO L158 Benchmark]: Boogie Preprocessor took 32.01ms. Allocated memory is still 362.8MB. Free memory was 326.1MB in the beginning and 324.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:04:32,714 INFO L158 Benchmark]: RCFGBuilder took 390.67ms. Allocated memory is still 362.8MB. Free memory was 324.6MB in the beginning and 309.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 10:04:32,714 INFO L158 Benchmark]: TraceAbstraction took 803898.48ms. Allocated memory was 362.8MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 309.4MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-08-24 10:04:32,715 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 362.8MB. Free memory is still 340.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 205.01ms. Allocated memory is still 362.8MB. Free memory was 338.2MB in the beginning and 327.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.07ms. Allocated memory is still 362.8MB. Free memory was 327.7MB in the beginning and 326.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.01ms. Allocated memory is still 362.8MB. Free memory was 326.1MB in the beginning and 324.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 390.67ms. Allocated memory is still 362.8MB. Free memory was 324.6MB in the beginning and 309.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 803898.48ms. Allocated memory was 362.8MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 309.4MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 73 PlacesBefore, 20 PlacesAfterwards, 72 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 7 FixpointIterations, 37 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 494 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 480, independent: 478, independent conditional: 0, independent unconditional: 478, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 229, independent: 227, independent conditional: 0, independent unconditional: 227, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 480, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 229, unknown conditional: 0, unknown unconditional: 229] , 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: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 55/146 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 58680 conditions, 4945 events (2864/4944 cut-off events. For 119978/119978 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 36378 event pairs, 3 based on Foata normal form. 0/5582 useless extension candidates. Maximal degree in co-relation 58508. Up to 2126 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 55/146 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 58680 conditions, 4945 events (2864/4944 cut-off events. For 119978/119978 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 36378 event pairs, 3 based on Foata normal form. 0/5582 useless extension candidates. Maximal degree in co-relation 58508. Up to 2126 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (39states, 55/146 universal loopers) in iteration 52,while PetriNetUnfolder was constructing finite prefix that currently has 58680 conditions, 4945 events (2864/4944 cut-off events. For 119978/119978 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 36378 event pairs, 3 based on Foata normal form. 0/5582 useless extension candidates. Maximal degree in co-relation 58508. Up to 2126 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 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: 803.8s, OverallIterations: 52, TraceHistogramMax: 7, PathProgramHistogramMax: 50, EmptinessCheckTime: 0.0s, AutomataDifference: 752.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5109 SdHoareTripleChecker+Valid, 20.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5109 mSDsluCounter, 986 SdHoareTripleChecker+Invalid, 17.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 744 mSDsCounter, 2380 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44121 IncrementalHoareTripleChecker+Invalid, 46501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2380 mSolverCounterUnsat, 242 mSDtfsCounter, 44121 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3477 GetRequests, 853 SyntacticMatches, 62 SemanticMatches, 2562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45594 ImplicationChecksByTransitivity, 48.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219477occurred in iteration=49, InterpolantAutomatonStates: 1820, 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: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 1797 NumberOfCodeBlocks, 1797 NumberOfCodeBlocksAsserted, 176 NumberOfCheckSat, 2535 ConstructedInterpolants, 0 QuantifiedInterpolants, 30893 SizeOfPredicates, 263 NumberOfNonLiveVariables, 6557 ConjunctsInSsa, 1384 ConjunctsInUnsatCore, 154 InterpolantComputations, 1 PerfectInterpolantSequences, 63/1416 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 [2023-08-24 10:04:32,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0