/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 PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:34:48,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:34:48,519 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 13:34:48,523 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:34:48,524 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:34:48,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:34:48,553 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:34:48,553 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:34:48,554 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:34:48,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:34:48,557 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:34:48,558 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:34:48,558 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:34:48,559 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:34:48,559 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:34:48,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:34:48,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:34:48,560 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:34:48,560 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:34:48,560 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:34:48,560 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:34:48,561 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:34:48,561 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:34:48,562 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:34:48,562 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:34:48,562 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:34:48,562 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:34:48,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:34:48,563 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:34:48,563 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:34:48,564 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:34:48,564 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:34:48,564 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:34:48,564 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:34:48,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:34:48,565 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:34:48,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:34:48,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:34:48,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:34:48,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:34:48,862 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:34:48,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-24 13:34:49,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:34:50,082 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:34:50,083 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-trans.wvr.c [2023-08-24 13:34:50,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81520aeae/acdeffc2519a450d9be219571f42ad03/FLAG0eb26d14b [2023-08-24 13:34:50,103 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81520aeae/acdeffc2519a450d9be219571f42ad03 [2023-08-24 13:34:50,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:34:50,106 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:34:50,107 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:34:50,107 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:34:50,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:34:50,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,110 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28343fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50, skipping insertion in model container [2023-08-24 13:34:50,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,131 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:34:50,268 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-24 13:34:50,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:34:50,285 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:34:50,304 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/chl-array-int-trans.wvr.c[2728,2741] [2023-08-24 13:34:50,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:34:50,319 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:34:50,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50 WrapperNode [2023-08-24 13:34:50,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:34:50,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:34:50,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:34:50,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:34:50,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,356 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 286 [2023-08-24 13:34:50,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:34:50,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:34:50,357 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:34:50,357 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:34:50,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,368 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,368 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,378 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,381 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:34:50,385 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:34:50,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:34:50,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:34:50,386 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (1/1) ... [2023-08-24 13:34:50,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:34:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:34:50,422 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 13:34:50,443 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 13:34:50,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:34:50,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:34:50,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:34:50,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:34:50,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:34:50,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:34:50,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:34:50,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:34:50,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 13:34:50,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 13:34:50,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:34:50,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:34:50,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:34:50,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:34:50,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:34:50,460 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 13:34:50,578 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:34:50,581 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:34:51,019 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:34:51,030 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:34:51,030 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 13:34:51,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:34:51 BoogieIcfgContainer [2023-08-24 13:34:51,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:34:51,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:34:51,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:34:51,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:34:51,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:34:50" (1/3) ... [2023-08-24 13:34:51,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6223f41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:34:51, skipping insertion in model container [2023-08-24 13:34:51,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:34:50" (2/3) ... [2023-08-24 13:34:51,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6223f41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:34:51, skipping insertion in model container [2023-08-24 13:34:51,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:34:51" (3/3) ... [2023-08-24 13:34:51,039 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-08-24 13:34:51,053 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:34:51,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:34:51,054 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:34:51,163 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 13:34:51,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 303 places, 321 transitions, 666 flow [2023-08-24 13:34:51,366 INFO L124 PetriNetUnfolderBase]: 28/318 cut-off events. [2023-08-24 13:34:51,367 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:34:51,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 318 events. 28/318 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 511 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 248. Up to 3 conditions per place. [2023-08-24 13:34:51,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 303 places, 321 transitions, 666 flow [2023-08-24 13:34:51,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 308 transitions, 634 flow [2023-08-24 13:34:51,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:34:51,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 308 transitions, 634 flow [2023-08-24 13:34:51,405 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 308 transitions, 634 flow [2023-08-24 13:34:51,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 308 transitions, 634 flow [2023-08-24 13:34:51,465 INFO L124 PetriNetUnfolderBase]: 28/308 cut-off events. [2023-08-24 13:34:51,465 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:34:51,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 308 events. 28/308 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 511 event pairs, 0 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 248. Up to 3 conditions per place. [2023-08-24 13:34:51,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2023-08-24 13:35:00,329 INFO L134 LiptonReduction]: Checked pairs total: 16347 [2023-08-24 13:35:00,330 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-24 13:35:00,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:35:00,348 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;@13b5d046, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:35:00,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 13:35:00,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:35:00,359 INFO L124 PetriNetUnfolderBase]: 8/35 cut-off events. [2023-08-24 13:35:00,359 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 13:35:00,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:00,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:00,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:00,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 99088314, now seen corresponding path program 1 times [2023-08-24 13:35:00,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:00,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858539130] [2023-08-24 13:35:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:00,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:01,113 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 13:35:01,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:01,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858539130] [2023-08-24 13:35:01,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858539130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:01,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:01,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:35:01,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23637498] [2023-08-24 13:35:01,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:01,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:35:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:01,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:35:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:35:01,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 659 [2023-08-24 13:35:01,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 240.14285714285714) internal successors, (1681), 7 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:01,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 659 [2023-08-24 13:35:01,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:01,636 INFO L124 PetriNetUnfolderBase]: 1630/2339 cut-off events. [2023-08-24 13:35:01,636 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-08-24 13:35:01,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4858 conditions, 2339 events. 1630/2339 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9695 event pairs, 519 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 2178. Up to 995 conditions per place. [2023-08-24 13:35:01,650 INFO L140 encePairwiseOnDemand]: 652/659 looper letters, 90 selfloop transitions, 6 changer transitions 6/103 dead transitions. [2023-08-24 13:35:01,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 103 transitions, 467 flow [2023-08-24 13:35:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:35:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:35:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1762 transitions. [2023-08-24 13:35:01,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819640147409495 [2023-08-24 13:35:01,672 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1762 transitions. [2023-08-24 13:35:01,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1762 transitions. [2023-08-24 13:35:01,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:01,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1762 transitions. [2023-08-24 13:35:01,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 251.71428571428572) internal successors, (1762), 7 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,699 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,700 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 90 flow. Second operand 7 states and 1762 transitions. [2023-08-24 13:35:01,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 103 transitions, 467 flow [2023-08-24 13:35:01,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 103 transitions, 429 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 13:35:01,709 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 121 flow [2023-08-24 13:35:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=121, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-08-24 13:35:01,714 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-24 13:35:01,714 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 121 flow [2023-08-24 13:35:01,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 240.14285714285714) internal successors, (1681), 7 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:01,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:01,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:01,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:35:01,717 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:01,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2081012322, now seen corresponding path program 1 times [2023-08-24 13:35:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873383335] [2023-08-24 13:35:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:02,139 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 13:35:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873383335] [2023-08-24 13:35:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873383335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006428123] [2023-08-24 13:35:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:02,144 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 13:35:02,170 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 13:35:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:02,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 13:35:02,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:02,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:35:02,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006428123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:02,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:35:02,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-08-24 13:35:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33702881] [2023-08-24 13:35:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:02,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:02,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-24 13:35:02,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 659 [2023-08-24 13:35:02,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 245.6) internal successors, (1228), 5 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:02,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 659 [2023-08-24 13:35:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:03,088 INFO L124 PetriNetUnfolderBase]: 3446/5123 cut-off events. [2023-08-24 13:35:03,088 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-08-24 13:35:03,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10795 conditions, 5123 events. 3446/5123 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25845 event pairs, 1226 based on Foata normal form. 2/3866 useless extension candidates. Maximal degree in co-relation 5867. Up to 2168 conditions per place. [2023-08-24 13:35:03,108 INFO L140 encePairwiseOnDemand]: 650/659 looper letters, 100 selfloop transitions, 10 changer transitions 4/115 dead transitions. [2023-08-24 13:35:03,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 547 flow [2023-08-24 13:35:03,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:35:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:35:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1790 transitions. [2023-08-24 13:35:03,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880338174723607 [2023-08-24 13:35:03,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1790 transitions. [2023-08-24 13:35:03,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1790 transitions. [2023-08-24 13:35:03,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:03,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1790 transitions. [2023-08-24 13:35:03,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 255.71428571428572) internal successors, (1790), 7 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,131 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,131 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 121 flow. Second operand 7 states and 1790 transitions. [2023-08-24 13:35:03,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 547 flow [2023-08-24 13:35:03,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 540 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 13:35:03,140 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 190 flow [2023-08-24 13:35:03,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-24 13:35:03,142 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-24 13:35:03,142 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 190 flow [2023-08-24 13:35:03,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.6) internal successors, (1228), 5 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:03,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:03,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 13:35:03,350 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 13:35:03,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:03,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:03,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1645561427, now seen corresponding path program 1 times [2023-08-24 13:35:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:03,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400692223] [2023-08-24 13:35:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:03,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:03,572 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 13:35:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400692223] [2023-08-24 13:35:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400692223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:03,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039680720] [2023-08-24 13:35:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:03,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:03,574 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 13:35:03,600 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 13:35:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:03,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:35:03,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:03,777 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 13:35:03,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:35:03,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039680720] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:03,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:03,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-24 13:35:03,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314179040] [2023-08-24 13:35:03,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:03,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:35:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:03,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:35:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-24 13:35:03,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 659 [2023-08-24 13:35:03,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 190 flow. Second operand has 7 states, 7 states have (on average 240.42857142857142) internal successors, (1683), 7 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:03,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:03,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 659 [2023-08-24 13:35:03,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:04,658 INFO L124 PetriNetUnfolderBase]: 3836/5572 cut-off events. [2023-08-24 13:35:04,659 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2023-08-24 13:35:04,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12668 conditions, 5572 events. 3836/5572 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 27892 event pairs, 1090 based on Foata normal form. 0/4190 useless extension candidates. Maximal degree in co-relation 6437. Up to 1497 conditions per place. [2023-08-24 13:35:04,685 INFO L140 encePairwiseOnDemand]: 650/659 looper letters, 150 selfloop transitions, 13 changer transitions 8/172 dead transitions. [2023-08-24 13:35:04,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 172 transitions, 879 flow [2023-08-24 13:35:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 13:35:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 13:35:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2295 transitions. [2023-08-24 13:35:04,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38694992412746587 [2023-08-24 13:35:04,691 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2295 transitions. [2023-08-24 13:35:04,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2295 transitions. [2023-08-24 13:35:04,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:04,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2295 transitions. [2023-08-24 13:35:04,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 255.0) internal successors, (2295), 9 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:04,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 659.0) internal successors, (6590), 10 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:04,707 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 659.0) internal successors, (6590), 10 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:04,707 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 190 flow. Second operand 9 states and 2295 transitions. [2023-08-24 13:35:04,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 172 transitions, 879 flow [2023-08-24 13:35:04,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 172 transitions, 866 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 13:35:04,715 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 246 flow [2023-08-24 13:35:04,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=246, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-24 13:35:04,716 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2023-08-24 13:35:04,716 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 246 flow [2023-08-24 13:35:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 240.42857142857142) internal successors, (1683), 7 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:04,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:04,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:04,725 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 13:35:04,925 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 13:35:04,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:04,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1003385407, now seen corresponding path program 1 times [2023-08-24 13:35:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:04,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972988155] [2023-08-24 13:35:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:05,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972988155] [2023-08-24 13:35:05,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972988155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:05,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:05,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:35:05,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714053854] [2023-08-24 13:35:05,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:35:05,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 659 [2023-08-24 13:35:05,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:05,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 659 [2023-08-24 13:35:05,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:05,618 INFO L124 PetriNetUnfolderBase]: 3067/4472 cut-off events. [2023-08-24 13:35:05,618 INFO L125 PetriNetUnfolderBase]: For 1587/1587 co-relation queries the response was YES. [2023-08-24 13:35:05,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10715 conditions, 4472 events. 3067/4472 cut-off events. For 1587/1587 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 20545 event pairs, 1726 based on Foata normal form. 0/3828 useless extension candidates. Maximal degree in co-relation 7077. Up to 3137 conditions per place. [2023-08-24 13:35:05,640 INFO L140 encePairwiseOnDemand]: 654/659 looper letters, 42 selfloop transitions, 4 changer transitions 52/98 dead transitions. [2023-08-24 13:35:05,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 98 transitions, 571 flow [2023-08-24 13:35:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:35:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:35:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1294 transitions. [2023-08-24 13:35:05,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39271623672230654 [2023-08-24 13:35:05,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1294 transitions. [2023-08-24 13:35:05,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1294 transitions. [2023-08-24 13:35:05,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:05,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1294 transitions. [2023-08-24 13:35:05,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 258.8) internal successors, (1294), 5 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,653 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 246 flow. Second operand 5 states and 1294 transitions. [2023-08-24 13:35:05,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 98 transitions, 571 flow [2023-08-24 13:35:05,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 98 transitions, 564 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 13:35:05,663 INFO L231 Difference]: Finished difference. Result has 64 places, 46 transitions, 197 flow [2023-08-24 13:35:05,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=197, PETRI_PLACES=64, PETRI_TRANSITIONS=46} [2023-08-24 13:35:05,665 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 26 predicate places. [2023-08-24 13:35:05,665 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 46 transitions, 197 flow [2023-08-24 13:35:05,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:05,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 13:35:05,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:05,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1657132405, now seen corresponding path program 1 times [2023-08-24 13:35:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548451818] [2023-08-24 13:35:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:05,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548451818] [2023-08-24 13:35:05,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548451818] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:35:05,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:35:05,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:35:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58366927] [2023-08-24 13:35:05,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:35:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:05,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:35:05,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:35:05,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 659 [2023-08-24 13:35:05,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 46 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:05,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:05,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 659 [2023-08-24 13:35:05,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:06,123 INFO L124 PetriNetUnfolderBase]: 1336/1948 cut-off events. [2023-08-24 13:35:06,123 INFO L125 PetriNetUnfolderBase]: For 874/874 co-relation queries the response was YES. [2023-08-24 13:35:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 1948 events. 1336/1948 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7575 event pairs, 725 based on Foata normal form. 42/1718 useless extension candidates. Maximal degree in co-relation 4683. Up to 1406 conditions per place. [2023-08-24 13:35:06,133 INFO L140 encePairwiseOnDemand]: 654/659 looper letters, 36 selfloop transitions, 2 changer transitions 42/81 dead transitions. [2023-08-24 13:35:06,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 444 flow [2023-08-24 13:35:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:35:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:35:06,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1293 transitions. [2023-08-24 13:35:06,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39241274658573594 [2023-08-24 13:35:06,137 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1293 transitions. [2023-08-24 13:35:06,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1293 transitions. [2023-08-24 13:35:06,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:06,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1293 transitions. [2023-08-24 13:35:06,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,145 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 659.0) internal successors, (3954), 6 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,145 INFO L175 Difference]: Start difference. First operand has 64 places, 46 transitions, 197 flow. Second operand 5 states and 1293 transitions. [2023-08-24 13:35:06,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 444 flow [2023-08-24 13:35:06,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 81 transitions, 396 flow, removed 9 selfloop flow, removed 9 redundant places. [2023-08-24 13:35:06,148 INFO L231 Difference]: Finished difference. Result has 52 places, 39 transitions, 128 flow [2023-08-24 13:35:06,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=52, PETRI_TRANSITIONS=39} [2023-08-24 13:35:06,149 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-24 13:35:06,149 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 39 transitions, 128 flow [2023-08-24 13:35:06,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:06,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 13:35:06,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:06,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1868473932, now seen corresponding path program 1 times [2023-08-24 13:35:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:06,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419277737] [2023-08-24 13:35:06,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:06,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:35:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419277737] [2023-08-24 13:35:06,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419277737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:06,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106998907] [2023-08-24 13:35:06,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:06,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:06,425 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 13:35:06,453 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 13:35:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:06,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 13:35:06,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:06,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106998907] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:35:06,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:35:06,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2023-08-24 13:35:06,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151712208] [2023-08-24 13:35:06,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:35:06,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 13:35:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 13:35:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-08-24 13:35:06,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 659 [2023-08-24 13:35:06,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 128 flow. Second operand has 18 states, 18 states have (on average 232.33333333333334) internal successors, (4182), 18 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:06,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:06,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 659 [2023-08-24 13:35:06,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:08,190 INFO L124 PetriNetUnfolderBase]: 4722/6915 cut-off events. [2023-08-24 13:35:08,190 INFO L125 PetriNetUnfolderBase]: For 2147/2147 co-relation queries the response was YES. [2023-08-24 13:35:08,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15460 conditions, 6915 events. 4722/6915 cut-off events. For 2147/2147 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 35515 event pairs, 1388 based on Foata normal form. 6/5844 useless extension candidates. Maximal degree in co-relation 15441. Up to 1291 conditions per place. [2023-08-24 13:35:08,217 INFO L140 encePairwiseOnDemand]: 647/659 looper letters, 132 selfloop transitions, 15 changer transitions 155/303 dead transitions. [2023-08-24 13:35:08,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 303 transitions, 1421 flow [2023-08-24 13:35:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:35:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:35:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5799 transitions. [2023-08-24 13:35:08,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36665402124430957 [2023-08-24 13:35:08,232 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5799 transitions. [2023-08-24 13:35:08,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5799 transitions. [2023-08-24 13:35:08,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:08,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5799 transitions. [2023-08-24 13:35:08,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 241.625) internal successors, (5799), 24 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:08,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 659.0) internal successors, (16475), 25 states have internal predecessors, (16475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:08,268 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 659.0) internal successors, (16475), 25 states have internal predecessors, (16475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:08,268 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 128 flow. Second operand 24 states and 5799 transitions. [2023-08-24 13:35:08,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 303 transitions, 1421 flow [2023-08-24 13:35:08,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 303 transitions, 1383 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-08-24 13:35:08,274 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 247 flow [2023-08-24 13:35:08,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=247, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-24 13:35:08,275 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 41 predicate places. [2023-08-24 13:35:08,275 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 247 flow [2023-08-24 13:35:08,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 232.33333333333334) internal successors, (4182), 18 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:08,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:08,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:08,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 13:35:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:08,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:08,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2068520229, now seen corresponding path program 1 times [2023-08-24 13:35:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493680829] [2023-08-24 13:35:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:08,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493680829] [2023-08-24 13:35:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493680829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30578647] [2023-08-24 13:35:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:08,693 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 13:35:08,695 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 13:35:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:08,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 13:35:08,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:08,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30578647] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 13:35:09,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 14 [2023-08-24 13:35:09,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936720864] [2023-08-24 13:35:09,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:35:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:35:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:35:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-08-24 13:35:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 659 [2023-08-24 13:35:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 247 flow. Second operand has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 659 [2023-08-24 13:35:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:09,695 INFO L124 PetriNetUnfolderBase]: 4352/6331 cut-off events. [2023-08-24 13:35:09,695 INFO L125 PetriNetUnfolderBase]: For 13601/13601 co-relation queries the response was YES. [2023-08-24 13:35:09,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19065 conditions, 6331 events. 4352/6331 cut-off events. For 13601/13601 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 31455 event pairs, 1173 based on Foata normal form. 0/5875 useless extension candidates. Maximal degree in co-relation 15963. Up to 4090 conditions per place. [2023-08-24 13:35:09,729 INFO L140 encePairwiseOnDemand]: 651/659 looper letters, 64 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-24 13:35:09,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 508 flow [2023-08-24 13:35:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:35:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:35:09,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1718 transitions. [2023-08-24 13:35:09,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724257533058747 [2023-08-24 13:35:09,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1718 transitions. [2023-08-24 13:35:09,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1718 transitions. [2023-08-24 13:35:09,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:09,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1718 transitions. [2023-08-24 13:35:09,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 245.42857142857142) internal successors, (1718), 7 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 659.0) internal successors, (5272), 8 states have internal predecessors, (5272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,743 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 247 flow. Second operand 7 states and 1718 transitions. [2023-08-24 13:35:09,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 508 flow [2023-08-24 13:35:09,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 75 transitions, 454 flow, removed 24 selfloop flow, removed 9 redundant places. [2023-08-24 13:35:09,784 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 247 flow [2023-08-24 13:35:09,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=247, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-24 13:35:09,785 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2023-08-24 13:35:09,785 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 247 flow [2023-08-24 13:35:09,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 241.0) internal successors, (1687), 7 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:09,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:09,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:09,794 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 13:35:09,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:09,991 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:09,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1174619569, now seen corresponding path program 1 times [2023-08-24 13:35:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639090569] [2023-08-24 13:35:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:09,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:35:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639090569] [2023-08-24 13:35:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639090569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262150384] [2023-08-24 13:35:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:10,213 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 13:35:10,216 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 13:35:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:10,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 13:35:10,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:35:10,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:35:10,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262150384] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:35:10,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:35:10,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 13:35:10,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581606408] [2023-08-24 13:35:10,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:35:10,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 13:35:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:35:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 13:35:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-24 13:35:10,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 659 [2023-08-24 13:35:10,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 247 flow. Second operand has 14 states, 14 states have (on average 244.35714285714286) internal successors, (3421), 14 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:10,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:35:10,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 659 [2023-08-24 13:35:10,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:35:11,916 INFO L124 PetriNetUnfolderBase]: 7646/11434 cut-off events. [2023-08-24 13:35:11,916 INFO L125 PetriNetUnfolderBase]: For 10952/10952 co-relation queries the response was YES. [2023-08-24 13:35:11,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32098 conditions, 11434 events. 7646/11434 cut-off events. For 10952/10952 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 65971 event pairs, 2766 based on Foata normal form. 4/11391 useless extension candidates. Maximal degree in co-relation 21510. Up to 4929 conditions per place. [2023-08-24 13:35:11,975 INFO L140 encePairwiseOnDemand]: 650/659 looper letters, 116 selfloop transitions, 17 changer transitions 4/138 dead transitions. [2023-08-24 13:35:11,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 138 transitions, 887 flow [2023-08-24 13:35:11,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 13:35:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 13:35:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2515 transitions. [2023-08-24 13:35:11,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38163884673748105 [2023-08-24 13:35:11,982 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2515 transitions. [2023-08-24 13:35:11,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2515 transitions. [2023-08-24 13:35:11,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:35:11,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2515 transitions. [2023-08-24 13:35:11,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 251.5) internal successors, (2515), 10 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 659.0) internal successors, (7249), 11 states have internal predecessors, (7249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,997 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 659.0) internal successors, (7249), 11 states have internal predecessors, (7249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:11,997 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 247 flow. Second operand 10 states and 2515 transitions. [2023-08-24 13:35:11,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 138 transitions, 887 flow [2023-08-24 13:35:12,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 138 transitions, 867 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 13:35:12,007 INFO L231 Difference]: Finished difference. Result has 80 places, 64 transitions, 386 flow [2023-08-24 13:35:12,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=386, PETRI_PLACES=80, PETRI_TRANSITIONS=64} [2023-08-24 13:35:12,009 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 42 predicate places. [2023-08-24 13:35:12,009 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 64 transitions, 386 flow [2023-08-24 13:35:12,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 244.35714285714286) internal successors, (3421), 14 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:35:12,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:35:12,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:35:12,016 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 13:35:12,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:12,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:35:12,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:35:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1930689046, now seen corresponding path program 1 times [2023-08-24 13:35:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:35:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316332728] [2023-08-24 13:35:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:35:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:13,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:35:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316332728] [2023-08-24 13:35:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316332728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:35:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057553472] [2023-08-24 13:35:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:35:13,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:35:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:35:13,391 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 13:35:13,393 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 13:35:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:35:13,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 13:35:13,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:35:13,742 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 13:35:13,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:35:13,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:35:14,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:35:14,493 INFO L322 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-24 13:35:14,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-24 13:35:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:35:14,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:35:15,440 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)) (.cse14 (* |c_thread2Thread1of1ForFork0_~i~1#1| 4))) (let ((.cse2 (+ .cse14 c_~a2~0.offset)) (.cse4 (+ .cse14 c_~a3~0.offset)) (.cse8 (+ c_~a1~0.offset .cse13)) (.cse9 (+ c_~a2~0.offset .cse13))) (let ((.cse0 (forall ((v_ArrVal_425 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse12 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse11 (select .cse12 ~a2~0.base))) (or (< (select .cse11 .cse2) (+ (select (select .cse12 c_~a3~0.base) .cse4) 1)) (< (select (select .cse12 ~a1~0.base) .cse8) (+ (select .cse11 .cse9) 1)))))))) (and (or (< 0 c_~n1~0) .cse0) (or (< 0 c_~n3~0) .cse0) (forall ((v_ArrVal_425 (Array Int Int)) (~a2~0.base Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse1 (select .cse10 ~a2~0.base)) (.cse3 (select .cse10 c_~a3~0.base))) (or (< (select .cse1 .cse2) (+ (select .cse3 .cse4) 1)) (forall ((~a1~0.base Int)) (let ((.cse7 (select .cse10 ~a1~0.base))) (let ((.cse6 (select .cse3 c_~a3~0.offset)) (.cse5 (select .cse7 c_~a1~0.offset))) (or (< (+ .cse5 2147483648) .cse6) (< .cse6 .cse5) (= .cse6 .cse5) (< (select .cse7 .cse8) (+ (select .cse1 .cse9) 1)))))))))))))) is different from false [2023-08-24 13:35:15,494 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (let ((.cse4 (+ c_~a1~0.offset .cse10)) (.cse6 (+ c_~a2~0.offset .cse10))) (let ((.cse0 (forall ((v_ArrVal_425 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse8 (select .cse9 ~a2~0.base))) (or (< (select .cse8 c_~a2~0.offset) (+ (select (select .cse9 c_~a3~0.base) c_~a3~0.offset) 1)) (< (select (select .cse9 ~a1~0.base) .cse4) (+ (select .cse8 .cse6) 1)))))))) (and (or (< 0 c_~n1~0) .cse0) (or .cse0 (< 0 c_~n3~0)) (forall ((v_ArrVal_425 (Array Int Int)) (~a2~0.base Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse5 (select .cse7 ~a2~0.base)) (.cse2 (select (select .cse7 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse3 (select .cse7 ~a1~0.base))) (let ((.cse1 (select .cse3 c_~a1~0.offset))) (or (< (+ .cse1 2147483648) .cse2) (< .cse2 .cse1) (= .cse2 .cse1) (< (select .cse3 .cse4) (+ (select .cse5 .cse6) 1)))))) (< (select .cse5 c_~a2~0.offset) (+ .cse2 1)))))))))) is different from false [2023-08-24 13:35:15,688 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (let ((.cse4 (+ c_~a1~0.offset .cse10)) (.cse6 (+ c_~a2~0.offset .cse10))) (let ((.cse0 (forall ((v_ArrVal_425 (Array Int Int)) (v_ArrVal_424 (Array Int Int)) (~a1~0.base Int) (~a2~0.base Int)) (let ((.cse8 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_424) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse9 (select .cse8 ~a2~0.base))) (or (< (select (select .cse8 ~a1~0.base) .cse4) (+ (select .cse9 .cse6) 1)) (< (select .cse9 c_~a2~0.offset) (+ (select (select .cse8 c_~a3~0.base) c_~a3~0.offset) 1)))))))) (and (or (< 0 c_~n3~0) .cse0) (forall ((v_ArrVal_425 (Array Int Int)) (v_ArrVal_424 (Array Int Int)) (~a2~0.base Int)) (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_424) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_425))) (let ((.cse5 (select .cse7 ~a2~0.base)) (.cse1 (select (select .cse7 c_~a3~0.base) c_~a3~0.offset))) (or (forall ((~a1~0.base Int)) (let ((.cse3 (select .cse7 ~a1~0.base))) (let ((.cse2 (select .cse3 c_~a1~0.offset))) (or (< .cse1 .cse2) (< (+ .cse2 2147483648) .cse1) (= .cse2 .cse1) (< (select .cse3 .cse4) (+ (select .cse5 .cse6) 1)))))) (< (select .cse5 c_~a2~0.offset) (+ .cse1 1)))))) (or (< 0 c_~n1~0) .cse0))))) is different from false [2023-08-24 13:35:15,930 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:15,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-08-24 13:35:16,000 INFO L322 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-08-24 13:35:16,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14955 treesize of output 14208 [2023-08-24 13:35:16,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:16,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2347 treesize of output 2307 [2023-08-24 13:35:16,311 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:16,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2283 treesize of output 2179 [2023-08-24 13:35:16,404 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:16,405 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2155 treesize of output 1923 [2023-08-24 13:35:34,012 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:34,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 75 [2023-08-24 13:35:34,053 INFO L322 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2023-08-24 13:35:34,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7467 treesize of output 7104 [2023-08-24 13:35:34,145 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:34,146 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2347 treesize of output 2243 [2023-08-24 13:35:34,196 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:34,196 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2219 treesize of output 1987 [2023-08-24 13:35:34,253 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 13:35:34,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1963 treesize of output 1923 [2023-08-24 13:36:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:36:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057553472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:36:51,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:36:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 42 [2023-08-24 13:36:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266991240] [2023-08-24 13:36:51,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:36:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 13:36:51,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:36:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 13:36:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1419, Unknown=15, NotChecked=240, Total=1892 [2023-08-24 13:36:51,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 659 [2023-08-24 13:36:51,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 64 transitions, 386 flow. Second operand has 44 states, 44 states have (on average 183.04545454545453) internal successors, (8054), 44 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:51,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:36:51,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 659 [2023-08-24 13:36:51,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:36:57,823 INFO L124 PetriNetUnfolderBase]: 19208/28339 cut-off events. [2023-08-24 13:36:57,824 INFO L125 PetriNetUnfolderBase]: For 20560/20560 co-relation queries the response was YES. [2023-08-24 13:36:57,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78341 conditions, 28339 events. 19208/28339 cut-off events. For 20560/20560 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 180923 event pairs, 4482 based on Foata normal form. 12/28351 useless extension candidates. Maximal degree in co-relation 52542. Up to 11502 conditions per place. [2023-08-24 13:36:58,022 INFO L140 encePairwiseOnDemand]: 640/659 looper letters, 196 selfloop transitions, 59 changer transitions 14/269 dead transitions. [2023-08-24 13:36:58,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 269 transitions, 1621 flow [2023-08-24 13:36:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 13:36:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 13:36:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4568 transitions. [2023-08-24 13:36:58,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28882144663631765 [2023-08-24 13:36:58,034 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4568 transitions. [2023-08-24 13:36:58,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4568 transitions. [2023-08-24 13:36:58,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:36:58,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4568 transitions. [2023-08-24 13:36:58,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 190.33333333333334) internal successors, (4568), 24 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:58,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 659.0) internal successors, (16475), 25 states have internal predecessors, (16475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:58,062 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 659.0) internal successors, (16475), 25 states have internal predecessors, (16475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:58,062 INFO L175 Difference]: Start difference. First operand has 80 places, 64 transitions, 386 flow. Second operand 24 states and 4568 transitions. [2023-08-24 13:36:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 269 transitions, 1621 flow [2023-08-24 13:36:58,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 269 transitions, 1593 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-24 13:36:58,081 INFO L231 Difference]: Finished difference. Result has 115 places, 105 transitions, 789 flow [2023-08-24 13:36:58,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=789, PETRI_PLACES=115, PETRI_TRANSITIONS=105} [2023-08-24 13:36:58,082 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2023-08-24 13:36:58,082 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 105 transitions, 789 flow [2023-08-24 13:36:58,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 183.04545454545453) internal successors, (8054), 44 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:36:58,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:36:58,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:36:58,095 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 13:36:58,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:58,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:36:58,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:36:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1331306486, now seen corresponding path program 2 times [2023-08-24 13:36:58,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:36:58,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593131772] [2023-08-24 13:36:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:36:58,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:36:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:36:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:36:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:36:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593131772] [2023-08-24 13:36:59,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593131772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:36:59,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976716662] [2023-08-24 13:36:59,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:36:59,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:36:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:36:59,437 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 13:36:59,441 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 13:36:59,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 13:36:59,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:36:59,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 13:36:59,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:37:00,029 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:37:00,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2023-08-24 13:37:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 13:37:00,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:37:01,245 INFO L322 Elim1Store]: treesize reduction 22, result has 93.4 percent of original size [2023-08-24 13:37:01,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 101 treesize of output 345 [2023-08-24 13:39:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-24 13:39:03,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976716662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:39:03,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:39:03,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 10] total 35 [2023-08-24 13:39:03,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936497135] [2023-08-24 13:39:03,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:39:03,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 13:39:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:39:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 13:39:03,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 13:39:03,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 659 [2023-08-24 13:39:03,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 105 transitions, 789 flow. Second operand has 36 states, 36 states have (on average 194.47222222222223) internal successors, (7001), 36 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:03,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:39:03,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 659 [2023-08-24 13:39:03,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:39:08,744 INFO L124 PetriNetUnfolderBase]: 23897/35515 cut-off events. [2023-08-24 13:39:08,744 INFO L125 PetriNetUnfolderBase]: For 156702/156702 co-relation queries the response was YES. [2023-08-24 13:39:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155159 conditions, 35515 events. 23897/35515 cut-off events. For 156702/156702 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 235251 event pairs, 6846 based on Foata normal form. 18/35533 useless extension candidates. Maximal degree in co-relation 154639. Up to 16251 conditions per place. [2023-08-24 13:39:09,091 INFO L140 encePairwiseOnDemand]: 640/659 looper letters, 225 selfloop transitions, 56 changer transitions 16/297 dead transitions. [2023-08-24 13:39:09,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 297 transitions, 2563 flow [2023-08-24 13:39:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 13:39:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 13:39:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3859 transitions. [2023-08-24 13:39:09,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3082022202699465 [2023-08-24 13:39:09,105 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3859 transitions. [2023-08-24 13:39:09,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3859 transitions. [2023-08-24 13:39:09,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:39:09,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3859 transitions. [2023-08-24 13:39:09,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 203.10526315789474) internal successors, (3859), 19 states have internal predecessors, (3859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:09,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 659.0) internal successors, (13180), 20 states have internal predecessors, (13180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:09,128 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 659.0) internal successors, (13180), 20 states have internal predecessors, (13180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:09,128 INFO L175 Difference]: Start difference. First operand has 115 places, 105 transitions, 789 flow. Second operand 19 states and 3859 transitions. [2023-08-24 13:39:09,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 297 transitions, 2563 flow [2023-08-24 13:39:09,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 297 transitions, 2457 flow, removed 39 selfloop flow, removed 9 redundant places. [2023-08-24 13:39:09,715 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 1243 flow [2023-08-24 13:39:09,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1243, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2023-08-24 13:39:09,716 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 94 predicate places. [2023-08-24 13:39:09,716 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 1243 flow [2023-08-24 13:39:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 194.47222222222223) internal successors, (7001), 36 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:09,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:39:09,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:39:09,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 13:39:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:39:09,933 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:39:09,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:39:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 659951355, now seen corresponding path program 1 times [2023-08-24 13:39:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:39:09,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19797546] [2023-08-24 13:39:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:39:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:39:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:39:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:39:10,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:39:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19797546] [2023-08-24 13:39:10,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19797546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:39:10,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839026166] [2023-08-24 13:39:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:39:10,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:39:10,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:39:10,246 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 13:39:10,248 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 13:39:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:39:10,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 13:39:10,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:39:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:39:10,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:39:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:39:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839026166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:39:10,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:39:10,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 13:39:10,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815822964] [2023-08-24 13:39:10,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:39:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 13:39:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:39:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 13:39:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2023-08-24 13:39:10,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 659 [2023-08-24 13:39:10,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 1243 flow. Second operand has 22 states, 22 states have (on average 239.72727272727272) internal successors, (5274), 22 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:10,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:39:10,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 659 [2023-08-24 13:39:10,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:39:15,691 INFO L124 PetriNetUnfolderBase]: 23250/34588 cut-off events. [2023-08-24 13:39:15,692 INFO L125 PetriNetUnfolderBase]: For 276978/277066 co-relation queries the response was YES. [2023-08-24 13:39:15,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179900 conditions, 34588 events. 23250/34588 cut-off events. For 276978/277066 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 235618 event pairs, 5396 based on Foata normal form. 82/33998 useless extension candidates. Maximal degree in co-relation 179299. Up to 17460 conditions per place. [2023-08-24 13:39:16,079 INFO L140 encePairwiseOnDemand]: 650/659 looper letters, 391 selfloop transitions, 27 changer transitions 8/429 dead transitions. [2023-08-24 13:39:16,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 429 transitions, 4221 flow [2023-08-24 13:39:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 13:39:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 13:39:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3768 transitions. [2023-08-24 13:39:16,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811836115326252 [2023-08-24 13:39:16,085 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3768 transitions. [2023-08-24 13:39:16,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3768 transitions. [2023-08-24 13:39:16,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:39:16,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3768 transitions. [2023-08-24 13:39:16,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 251.2) internal successors, (3768), 15 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:16,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 659.0) internal successors, (10544), 16 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:16,100 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 659.0) internal successors, (10544), 16 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:16,101 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 1243 flow. Second operand 15 states and 3768 transitions. [2023-08-24 13:39:16,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 429 transitions, 4221 flow [2023-08-24 13:39:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 429 transitions, 3991 flow, removed 105 selfloop flow, removed 6 redundant places. [2023-08-24 13:39:17,311 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1354 flow [2023-08-24 13:39:17,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1354, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2023-08-24 13:39:17,311 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2023-08-24 13:39:17,311 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1354 flow [2023-08-24 13:39:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 239.72727272727272) internal successors, (5274), 22 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:17,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:39:17,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:39:17,317 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 13:39:17,513 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,SelfDestructingSolverStorable10 [2023-08-24 13:39:17,513 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:39:17,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:39:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash -559928612, now seen corresponding path program 3 times [2023-08-24 13:39:17,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:39:17,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126027034] [2023-08-24 13:39:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:39:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:39:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:39:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:39:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:39:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126027034] [2023-08-24 13:39:18,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126027034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:39:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10695679] [2023-08-24 13:39:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:39:18,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:39:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:39:18,533 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 13:39:18,535 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 13:39:18,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 13:39:18,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:39:18,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-24 13:39:18,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:39:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:39:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:39:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 13:39:18,825 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 13:39:18,825 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 13:39:18,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 13:39:18,893 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 13:39:18,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 13:39:18,923 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:18,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:19,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:19,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:19,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:19,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 13:39:19,754 INFO L322 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-24 13:39:19,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 38 [2023-08-24 13:39:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:39:19,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 13:39:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:39:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10695679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 13:39:20,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 13:39:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 15] total 46 [2023-08-24 13:39:20,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767889760] [2023-08-24 13:39:20,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 13:39:20,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 13:39:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:39:20,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 13:39:20,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1884, Unknown=13, NotChecked=0, Total=2162 [2023-08-24 13:39:20,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 659 [2023-08-24 13:39:20,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1354 flow. Second operand has 47 states, 47 states have (on average 180.80851063829786) internal successors, (8498), 47 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:20,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:39:20,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 659 [2023-08-24 13:39:20,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:39:38,894 INFO L124 PetriNetUnfolderBase]: 62866/92374 cut-off events. [2023-08-24 13:39:38,895 INFO L125 PetriNetUnfolderBase]: For 788786/788786 co-relation queries the response was YES. [2023-08-24 13:39:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493476 conditions, 92374 events. 62866/92374 cut-off events. For 788786/788786 co-relation queries the response was YES. Maximal size of possible extension queue 2982. Compared 682750 event pairs, 7275 based on Foata normal form. 36/92410 useless extension candidates. Maximal degree in co-relation 466882. Up to 27511 conditions per place. [2023-08-24 13:39:39,957 INFO L140 encePairwiseOnDemand]: 640/659 looper letters, 746 selfloop transitions, 246 changer transitions 30/1022 dead transitions. [2023-08-24 13:39:39,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 1022 transitions, 9889 flow [2023-08-24 13:39:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 13:39:39,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 13:39:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 9189 transitions. [2023-08-24 13:39:39,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2904969650986343 [2023-08-24 13:39:39,970 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 9189 transitions. [2023-08-24 13:39:39,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 9189 transitions. [2023-08-24 13:39:39,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:39:39,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 9189 transitions. [2023-08-24 13:39:39,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 191.4375) internal successors, (9189), 48 states have internal predecessors, (9189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:40,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 659.0) internal successors, (32291), 49 states have internal predecessors, (32291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:40,014 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 659.0) internal successors, (32291), 49 states have internal predecessors, (32291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:40,014 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1354 flow. Second operand 48 states and 9189 transitions. [2023-08-24 13:39:40,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 1022 transitions, 9889 flow [2023-08-24 13:39:43,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 1022 transitions, 9804 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-08-24 13:39:43,577 INFO L231 Difference]: Finished difference. Result has 215 places, 381 transitions, 5005 flow [2023-08-24 13:39:43,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5005, PETRI_PLACES=215, PETRI_TRANSITIONS=381} [2023-08-24 13:39:43,578 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 177 predicate places. [2023-08-24 13:39:43,578 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 381 transitions, 5005 flow [2023-08-24 13:39:43,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 180.80851063829786) internal successors, (8498), 47 states have internal predecessors, (8498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:43,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:39:43,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:39:43,583 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 13:39:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:39:43,779 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:39:43,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:39:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1043153970, now seen corresponding path program 2 times [2023-08-24 13:39:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:39:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260273708] [2023-08-24 13:39:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:39:43,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:39:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:39:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:39:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:39:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260273708] [2023-08-24 13:39:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260273708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:39:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613081749] [2023-08-24 13:39:44,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 13:39:44,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:39:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:39:44,747 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 13:39:44,752 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 13:39:44,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 13:39:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:39:44,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 13:39:44,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:39:45,556 INFO L322 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-24 13:39:45,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-24 13:39:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:39:45,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:39:45,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613081749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:39:45,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:39:45,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-08-24 13:39:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714579887] [2023-08-24 13:39:45,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:39:45,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 13:39:45,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:39:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 13:39:45,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2023-08-24 13:39:45,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 659 [2023-08-24 13:39:45,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 381 transitions, 5005 flow. Second operand has 16 states, 16 states have (on average 223.9375) internal successors, (3583), 16 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:39:45,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:39:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 659 [2023-08-24 13:39:45,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:40:07,092 INFO L124 PetriNetUnfolderBase]: 71989/107446 cut-off events. [2023-08-24 13:40:07,092 INFO L125 PetriNetUnfolderBase]: For 1937151/1937151 co-relation queries the response was YES. [2023-08-24 13:40:08,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734728 conditions, 107446 events. 71989/107446 cut-off events. For 1937151/1937151 co-relation queries the response was YES. Maximal size of possible extension queue 3631. Compared 844277 event pairs, 12570 based on Foata normal form. 6/107452 useless extension candidates. Maximal degree in co-relation 730976. Up to 36486 conditions per place. [2023-08-24 13:40:08,936 INFO L140 encePairwiseOnDemand]: 642/659 looper letters, 518 selfloop transitions, 172 changer transitions 13/703 dead transitions. [2023-08-24 13:40:08,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 703 transitions, 10664 flow [2023-08-24 13:40:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:40:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:40:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3049 transitions. [2023-08-24 13:40:08,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35590054861678533 [2023-08-24 13:40:08,940 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3049 transitions. [2023-08-24 13:40:08,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3049 transitions. [2023-08-24 13:40:08,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:40:08,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3049 transitions. [2023-08-24 13:40:08,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 234.53846153846155) internal successors, (3049), 13 states have internal predecessors, (3049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:08,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 659.0) internal successors, (9226), 14 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:08,950 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 659.0) internal successors, (9226), 14 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:40:08,950 INFO L175 Difference]: Start difference. First operand has 215 places, 381 transitions, 5005 flow. Second operand 13 states and 3049 transitions. [2023-08-24 13:40:08,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 703 transitions, 10664 flow [2023-08-24 13:41:54,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 703 transitions, 8529 flow, removed 1053 selfloop flow, removed 9 redundant places. [2023-08-24 13:41:54,943 INFO L231 Difference]: Finished difference. Result has 223 places, 406 transitions, 4896 flow [2023-08-24 13:41:54,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4896, PETRI_PLACES=223, PETRI_TRANSITIONS=406} [2023-08-24 13:41:54,944 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 185 predicate places. [2023-08-24 13:41:54,944 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 406 transitions, 4896 flow [2023-08-24 13:41:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 223.9375) internal successors, (3583), 16 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:41:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:41:54,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:41:54,949 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 13:41:55,149 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,SelfDestructingSolverStorable12 [2023-08-24 13:41:55,149 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:41:55,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:41:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1129187690, now seen corresponding path program 3 times [2023-08-24 13:41:55,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:41:55,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362344821] [2023-08-24 13:41:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:41:55,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:41:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:41:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:41:56,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:41:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362344821] [2023-08-24 13:41:56,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362344821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:41:56,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480327879] [2023-08-24 13:41:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 13:41:56,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:41:56,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:41:56,081 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 13:41:56,085 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 13:41:56,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 13:41:56,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:41:56,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 13:41:56,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:41:56,956 INFO L322 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-24 13:41:56,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-24 13:41:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:41:57,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:41:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480327879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:41:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:41:57,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 28 [2023-08-24 13:41:57,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190015498] [2023-08-24 13:41:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:41:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 13:41:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:41:57,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 13:41:57,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2023-08-24 13:41:57,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 659 [2023-08-24 13:41:57,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 406 transitions, 4896 flow. Second operand has 16 states, 16 states have (on average 223.9375) internal successors, (3583), 16 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:41:57,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:41:57,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 659 [2023-08-24 13:41:57,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:42:22,071 INFO L124 PetriNetUnfolderBase]: 83095/124162 cut-off events. [2023-08-24 13:42:22,071 INFO L125 PetriNetUnfolderBase]: For 1681518/1681518 co-relation queries the response was YES. [2023-08-24 13:42:23,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767239 conditions, 124162 events. 83095/124162 cut-off events. For 1681518/1681518 co-relation queries the response was YES. Maximal size of possible extension queue 4251. Compared 988442 event pairs, 22712 based on Foata normal form. 6/124168 useless extension candidates. Maximal degree in co-relation 762583. Up to 79098 conditions per place. [2023-08-24 13:42:24,474 INFO L140 encePairwiseOnDemand]: 644/659 looper letters, 500 selfloop transitions, 187 changer transitions 12/699 dead transitions. [2023-08-24 13:42:24,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 699 transitions, 9755 flow [2023-08-24 13:42:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:42:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:42:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3040 transitions. [2023-08-24 13:42:24,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548500058363488 [2023-08-24 13:42:24,479 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3040 transitions. [2023-08-24 13:42:24,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3040 transitions. [2023-08-24 13:42:24,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:42:24,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3040 transitions. [2023-08-24 13:42:24,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.84615384615384) internal successors, (3040), 13 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:24,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 659.0) internal successors, (9226), 14 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:24,489 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 659.0) internal successors, (9226), 14 states have internal predecessors, (9226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:42:24,489 INFO L175 Difference]: Start difference. First operand has 223 places, 406 transitions, 4896 flow. Second operand 13 states and 3040 transitions. [2023-08-24 13:42:24,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 699 transitions, 9755 flow [2023-08-24 13:43:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 699 transitions, 9246 flow, removed 63 selfloop flow, removed 6 redundant places. [2023-08-24 13:43:04,360 INFO L231 Difference]: Finished difference. Result has 237 places, 482 transitions, 6421 flow [2023-08-24 13:43:04,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=659, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6421, PETRI_PLACES=237, PETRI_TRANSITIONS=482} [2023-08-24 13:43:04,360 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 199 predicate places. [2023-08-24 13:43:04,361 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 482 transitions, 6421 flow [2023-08-24 13:43:04,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 223.9375) internal successors, (3583), 16 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:04,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:43:04,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:43:04,366 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 13:43:04,561 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,SelfDestructingSolverStorable13 [2023-08-24 13:43:04,562 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 13:43:04,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:43:04,562 INFO L85 PathProgramCache]: Analyzing trace with hash 861595604, now seen corresponding path program 4 times [2023-08-24 13:43:04,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:43:04,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871481636] [2023-08-24 13:43:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:43:04,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:43:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:43:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:43:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:43:05,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871481636] [2023-08-24 13:43:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871481636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 13:43:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397134423] [2023-08-24 13:43:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 13:43:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 13:43:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:43:05,469 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 13:43:05,494 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 13:43:05,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 13:43:05,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 13:43:05,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-24 13:43:05,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 13:43:06,169 INFO L322 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2023-08-24 13:43:06,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 40 [2023-08-24 13:43:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:43:06,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 13:43:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397134423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:43:06,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 13:43:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2023-08-24 13:43:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758065016] [2023-08-24 13:43:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:43:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 13:43:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:43:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 13:43:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2023-08-24 13:43:06,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 659 [2023-08-24 13:43:06,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 482 transitions, 6421 flow. Second operand has 16 states, 16 states have (on average 223.9375) internal successors, (3583), 16 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:43:06,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:43:06,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 659 [2023-08-24 13:43:06,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:43:34,462 INFO L124 PetriNetUnfolderBase]: 85111/127462 cut-off events. [2023-08-24 13:43:34,463 INFO L125 PetriNetUnfolderBase]: For 1899996/1899996 co-relation queries the response was YES.