/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:50:01,959 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:50:02,028 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-SemanticLbe.epf [2023-11-17 15:50:02,054 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:50:02,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:50:02,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:50:02,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:50:02,056 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:50:02,056 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:50:02,059 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:50:02,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:50:02,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:50:02,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:50:02,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:50:02,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:50:02,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:50:02,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:50:02,062 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:50:02,063 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:50:02,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:50:02,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:50:02,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:50:02,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:50:02,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:50:02,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:50:02,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:50:02,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:50:02,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:50:02,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:50:02,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:50:02,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:50:02,243 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:50:02,243 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:50:02,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-11-17 15:50:03,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:50:03,392 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:50:03,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-symm.wvr.c [2023-11-17 15:50:03,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d4884f2/59e3fa5e070b45ceaccdfde77636486f/FLAGd1a0c1eb7 [2023-11-17 15:50:03,415 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2d4884f2/59e3fa5e070b45ceaccdfde77636486f [2023-11-17 15:50:03,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:50:03,418 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:50:03,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:50:03,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:50:03,423 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:50:03,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aab077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03, skipping insertion in model container [2023-11-17 15:50:03,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,443 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:50:03,585 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-symm.wvr.c[2508,2521] [2023-11-17 15:50:03,591 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:50:03,596 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:50:03,611 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-symm.wvr.c[2508,2521] [2023-11-17 15:50:03,614 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:50:03,623 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:50:03,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03 WrapperNode [2023-11-17 15:50:03,624 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:50:03,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:50:03,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:50:03,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:50:03,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,637 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,658 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 205 [2023-11-17 15:50:03,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:50:03,659 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:50:03,659 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:50:03,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:50:03,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,670 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,670 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,678 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,682 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:50:03,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:50:03,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:50:03,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:50:03,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (1/1) ... [2023-11-17 15:50:03,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:50:03,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:03,722 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:50:03,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:50:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:50:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:50:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:50:03,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 15:50:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 15:50:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:50:03,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:50:03,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:50:03,801 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:50:03,900 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:50:03,902 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:50:04,209 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:50:04,224 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:50:04,224 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 15:50:04,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:50:04 BoogieIcfgContainer [2023-11-17 15:50:04,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:50:04,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:50:04,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:50:04,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:50:04,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:50:03" (1/3) ... [2023-11-17 15:50:04,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207034ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:50:04, skipping insertion in model container [2023-11-17 15:50:04,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:50:03" (2/3) ... [2023-11-17 15:50:04,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207034ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:50:04, skipping insertion in model container [2023-11-17 15:50:04,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:50:04" (3/3) ... [2023-11-17 15:50:04,231 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-11-17 15:50:04,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:50:04,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:50:04,243 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:50:04,297 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:50:04,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 262 transitions, 538 flow [2023-11-17 15:50:04,394 INFO L124 PetriNetUnfolderBase]: 21/260 cut-off events. [2023-11-17 15:50:04,394 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:50:04,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 260 events. 21/260 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 352 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 168. Up to 3 conditions per place. [2023-11-17 15:50:04,401 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 262 transitions, 538 flow [2023-11-17 15:50:04,417 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 251 transitions, 514 flow [2023-11-17 15:50:04,419 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:50:04,428 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 251 transitions, 514 flow [2023-11-17 15:50:04,430 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 251 transitions, 514 flow [2023-11-17 15:50:04,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 251 transitions, 514 flow [2023-11-17 15:50:04,487 INFO L124 PetriNetUnfolderBase]: 21/251 cut-off events. [2023-11-17 15:50:04,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:50:04,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 251 events. 21/251 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 351 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 168. Up to 3 conditions per place. [2023-11-17 15:50:04,493 INFO L119 LiptonReduction]: Number of co-enabled transitions 6732 [2023-11-17 15:50:09,705 INFO L134 LiptonReduction]: Checked pairs total: 6625 [2023-11-17 15:50:09,705 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-11-17 15:50:09,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:50:09,746 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@482014ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:50:09,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:50:09,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:50:09,758 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-17 15:50:09,758 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:50:09,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:09,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:09,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:09,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1576049998, now seen corresponding path program 1 times [2023-11-17 15:50:09,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:09,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247787622] [2023-11-17 15:50:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:10,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247787622] [2023-11-17 15:50:10,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247787622] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:10,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:50:10,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-17 15:50:10,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790691182] [2023-11-17 15:50:10,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:10,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:50:10,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:10,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:50:10,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-17 15:50:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:50:10,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 191.875) internal successors, (1535), 8 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:10,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:10,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:50:10,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:10,596 INFO L124 PetriNetUnfolderBase]: 156/289 cut-off events. [2023-11-17 15:50:10,596 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:50:10,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 289 events. 156/289 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 987 event pairs, 35 based on Foata normal form. 1/240 useless extension candidates. Maximal degree in co-relation 256. Up to 134 conditions per place. [2023-11-17 15:50:10,600 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 52 selfloop transitions, 11 changer transitions 7/70 dead transitions. [2023-11-17 15:50:10,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 70 transitions, 322 flow [2023-11-17 15:50:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:50:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:50:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1783 transitions. [2023-11-17 15:50:10,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3615166261151663 [2023-11-17 15:50:10,618 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1783 transitions. [2023-11-17 15:50:10,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1783 transitions. [2023-11-17 15:50:10,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:10,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1783 transitions. [2023-11-17 15:50:10,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.11111111111111) internal successors, (1783), 9 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:10,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:10,637 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:10,639 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 9 states and 1783 transitions. [2023-11-17 15:50:10,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 70 transitions, 322 flow [2023-11-17 15:50:10,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 70 transitions, 294 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:10,644 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 126 flow [2023-11-17 15:50:10,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=126, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-17 15:50:10,647 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2023-11-17 15:50:10,648 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 126 flow [2023-11-17 15:50:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 191.875) internal successors, (1535), 8 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:10,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:10,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:10,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:50:10,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:10,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1186943890, now seen corresponding path program 1 times [2023-11-17 15:50:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:10,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107732308] [2023-11-17 15:50:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107732308] [2023-11-17 15:50:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107732308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:10,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267941189] [2023-11-17 15:50:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:10,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:10,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:10,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:50:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:10,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 15:50:10,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:11,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:11,205 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:11,206 INFO L378 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 145 treesize of output 125 [2023-11-17 15:50:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267941189] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:11,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:11,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2023-11-17 15:50:11,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036164213] [2023-11-17 15:50:11,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:50:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:50:11,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-17 15:50:11,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:50:11,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:11,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:11,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:50:11,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:11,593 INFO L124 PetriNetUnfolderBase]: 272/504 cut-off events. [2023-11-17 15:50:11,593 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-17 15:50:11,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 504 events. 272/504 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2077 event pairs, 116 based on Foata normal form. 13/458 useless extension candidates. Maximal degree in co-relation 1051. Up to 145 conditions per place. [2023-11-17 15:50:11,595 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 76 selfloop transitions, 10 changer transitions 5/91 dead transitions. [2023-11-17 15:50:11,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 91 transitions, 473 flow [2023-11-17 15:50:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 15:50:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 15:50:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1417 transitions. [2023-11-17 15:50:11,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693952033368092 [2023-11-17 15:50:11,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1417 transitions. [2023-11-17 15:50:11,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1417 transitions. [2023-11-17 15:50:11,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:11,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1417 transitions. [2023-11-17 15:50:11,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.42857142857142) internal successors, (1417), 7 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:11,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:11,606 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 548.0) internal successors, (4384), 8 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:11,606 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 126 flow. Second operand 7 states and 1417 transitions. [2023-11-17 15:50:11,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 91 transitions, 473 flow [2023-11-17 15:50:11,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 91 transitions, 469 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:50:11,609 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 186 flow [2023-11-17 15:50:11,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-17 15:50:11,610 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 18 predicate places. [2023-11-17 15:50:11,610 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 186 flow [2023-11-17 15:50:11,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:11,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:11,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:11,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:11,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:11,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:11,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 502754368, now seen corresponding path program 1 times [2023-11-17 15:50:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:11,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586052609] [2023-11-17 15:50:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:11,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586052609] [2023-11-17 15:50:11,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586052609] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:11,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155094949] [2023-11-17 15:50:11,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:11,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:12,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:50:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:12,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 15:50:12,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:12,311 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:12,311 INFO L378 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 127 treesize of output 108 [2023-11-17 15:50:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:12,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:12,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:12,420 INFO L378 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 145 treesize of output 125 [2023-11-17 15:50:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:12,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155094949] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:12,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:12,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2023-11-17 15:50:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897434707] [2023-11-17 15:50:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:12,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:50:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:50:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-17 15:50:12,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:50:12,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 186 flow. Second operand has 9 states, 9 states have (on average 191.77777777777777) internal successors, (1726), 9 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:12,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:12,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:50:12,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:12,811 INFO L124 PetriNetUnfolderBase]: 388/719 cut-off events. [2023-11-17 15:50:12,811 INFO L125 PetriNetUnfolderBase]: For 662/662 co-relation queries the response was YES. [2023-11-17 15:50:12,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 719 events. 388/719 cut-off events. For 662/662 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3327 event pairs, 194 based on Foata normal form. 13/648 useless extension candidates. Maximal degree in co-relation 1649. Up to 362 conditions per place. [2023-11-17 15:50:12,814 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 86 selfloop transitions, 11 changer transitions 4/101 dead transitions. [2023-11-17 15:50:12,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 101 transitions, 604 flow [2023-11-17 15:50:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:50:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:50:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1608 transitions. [2023-11-17 15:50:12,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36678832116788324 [2023-11-17 15:50:12,817 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1608 transitions. [2023-11-17 15:50:12,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1608 transitions. [2023-11-17 15:50:12,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:12,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1608 transitions. [2023-11-17 15:50:12,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:12,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:12,825 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:12,825 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 186 flow. Second operand 8 states and 1608 transitions. [2023-11-17 15:50:12,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 101 transitions, 604 flow [2023-11-17 15:50:12,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 101 transitions, 591 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 15:50:12,828 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 264 flow [2023-11-17 15:50:12,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=264, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-11-17 15:50:12,829 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-11-17 15:50:12,829 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 264 flow [2023-11-17 15:50:12,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 191.77777777777777) internal successors, (1726), 9 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:12,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:12,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:12,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:13,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-17 15:50:13,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:13,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:13,035 INFO L85 PathProgramCache]: Analyzing trace with hash 252316846, now seen corresponding path program 2 times [2023-11-17 15:50:13,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128531702] [2023-11-17 15:50:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:13,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:13,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128531702] [2023-11-17 15:50:13,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128531702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:13,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093227634] [2023-11-17 15:50:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:13,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:13,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:13,216 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 15:50:13,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:50:13,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:13,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 15:50:13,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:50:13,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:13,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093227634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:13,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:13,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-17 15:50:13,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475172368] [2023-11-17 15:50:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:13,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:50:13,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:13,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:50:13,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:50:13,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:50:13,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:13,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:13,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:50:13,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:13,564 INFO L124 PetriNetUnfolderBase]: 396/751 cut-off events. [2023-11-17 15:50:13,564 INFO L125 PetriNetUnfolderBase]: For 1066/1066 co-relation queries the response was YES. [2023-11-17 15:50:13,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 751 events. 396/751 cut-off events. For 1066/1066 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3667 event pairs, 64 based on Foata normal form. 19/680 useless extension candidates. Maximal degree in co-relation 1836. Up to 343 conditions per place. [2023-11-17 15:50:13,567 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 66 selfloop transitions, 20 changer transitions 6/92 dead transitions. [2023-11-17 15:50:13,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 597 flow [2023-11-17 15:50:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:50:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:50:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1789 transitions. [2023-11-17 15:50:13,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627331711273317 [2023-11-17 15:50:13,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1789 transitions. [2023-11-17 15:50:13,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1789 transitions. [2023-11-17 15:50:13,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:13,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1789 transitions. [2023-11-17 15:50:13,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.77777777777777) internal successors, (1789), 9 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:13,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:13,579 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:13,579 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 264 flow. Second operand 9 states and 1789 transitions. [2023-11-17 15:50:13,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 597 flow [2023-11-17 15:50:13,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 566 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-17 15:50:13,583 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 353 flow [2023-11-17 15:50:13,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-11-17 15:50:13,584 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2023-11-17 15:50:13,584 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 353 flow [2023-11-17 15:50:13,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 192.28571428571428) internal successors, (1346), 7 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:13,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:13,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:13,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 15:50:13,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:13,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:13,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 262267950, now seen corresponding path program 2 times [2023-11-17 15:50:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:13,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77336598] [2023-11-17 15:50:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77336598] [2023-11-17 15:50:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77336598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:13,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433274152] [2023-11-17 15:50:13,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:13,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:13,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:14,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:14,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 15:50:14,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:50:14,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:14,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 15:50:14,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:14,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:14,173 INFO L378 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 93 treesize of output 74 [2023-11-17 15:50:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:50:14,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:14,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433274152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:14,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-11-17 15:50:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223246420] [2023-11-17 15:50:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:50:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:50:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-17 15:50:14,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:50:14,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 353 flow. Second operand has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:14,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:14,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:50:14,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:14,413 INFO L124 PetriNetUnfolderBase]: 378/732 cut-off events. [2023-11-17 15:50:14,413 INFO L125 PetriNetUnfolderBase]: For 1568/1568 co-relation queries the response was YES. [2023-11-17 15:50:14,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2120 conditions, 732 events. 378/732 cut-off events. For 1568/1568 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3636 event pairs, 64 based on Foata normal form. 19/661 useless extension candidates. Maximal degree in co-relation 1897. Up to 323 conditions per place. [2023-11-17 15:50:14,416 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 64 selfloop transitions, 23 changer transitions 6/93 dead transitions. [2023-11-17 15:50:14,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 655 flow [2023-11-17 15:50:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:50:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:50:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1785 transitions. [2023-11-17 15:50:14,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619221411192214 [2023-11-17 15:50:14,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1785 transitions. [2023-11-17 15:50:14,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1785 transitions. [2023-11-17 15:50:14,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:14,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1785 transitions. [2023-11-17 15:50:14,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.33333333333334) internal successors, (1785), 9 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:14,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:14,427 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:14,427 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 353 flow. Second operand 9 states and 1785 transitions. [2023-11-17 15:50:14,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 655 flow [2023-11-17 15:50:14,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 630 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-17 15:50:14,432 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 427 flow [2023-11-17 15:50:14,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-11-17 15:50:14,432 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2023-11-17 15:50:14,433 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 427 flow [2023-11-17 15:50:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 192.0) internal successors, (1536), 8 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:14,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:14,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:14,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:14,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:14,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1732272112, now seen corresponding path program 1 times [2023-11-17 15:50:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723321138] [2023-11-17 15:50:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:14,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:14,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:14,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723321138] [2023-11-17 15:50:14,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723321138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:14,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996732863] [2023-11-17 15:50:14,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:14,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:14,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 15:50:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:14,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 15:50:14,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:14,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:15,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996732863] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:15,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:15,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2023-11-17 15:50:15,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191800990] [2023-11-17 15:50:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:50:15,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:50:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-17 15:50:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 548 [2023-11-17 15:50:15,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 427 flow. Second operand has 7 states, 7 states have (on average 199.42857142857142) internal successors, (1396), 7 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:15,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 548 [2023-11-17 15:50:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:15,244 INFO L124 PetriNetUnfolderBase]: 398/776 cut-off events. [2023-11-17 15:50:15,245 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2023-11-17 15:50:15,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2421 conditions, 776 events. 398/776 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3941 event pairs, 126 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 1980. Up to 216 conditions per place. [2023-11-17 15:50:15,248 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 91 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2023-11-17 15:50:15,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 875 flow [2023-11-17 15:50:15,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:50:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:50:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1864 transitions. [2023-11-17 15:50:15,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37793998377939986 [2023-11-17 15:50:15,252 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1864 transitions. [2023-11-17 15:50:15,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1864 transitions. [2023-11-17 15:50:15,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:15,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1864 transitions. [2023-11-17 15:50:15,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.11111111111111) internal successors, (1864), 9 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,261 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,261 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 427 flow. Second operand 9 states and 1864 transitions. [2023-11-17 15:50:15,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 875 flow [2023-11-17 15:50:15,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 852 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 15:50:15,266 INFO L231 Difference]: Finished difference. Result has 74 places, 60 transitions, 450 flow [2023-11-17 15:50:15,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=450, PETRI_PLACES=74, PETRI_TRANSITIONS=60} [2023-11-17 15:50:15,266 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2023-11-17 15:50:15,266 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 60 transitions, 450 flow [2023-11-17 15:50:15,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 199.42857142857142) internal successors, (1396), 7 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:15,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:15,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:15,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:15,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:15,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 103724198, now seen corresponding path program 1 times [2023-11-17 15:50:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:15,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271965159] [2023-11-17 15:50:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:15,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:15,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271965159] [2023-11-17 15:50:15,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271965159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:15,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:50:15,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 15:50:15,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994844474] [2023-11-17 15:50:15,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:15,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:50:15,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:50:15,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:50:15,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:50:15,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 60 transitions, 450 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:15,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:50:15,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:15,642 INFO L124 PetriNetUnfolderBase]: 262/536 cut-off events. [2023-11-17 15:50:15,642 INFO L125 PetriNetUnfolderBase]: For 1679/1679 co-relation queries the response was YES. [2023-11-17 15:50:15,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 536 events. 262/536 cut-off events. For 1679/1679 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2471 event pairs, 167 based on Foata normal form. 24/558 useless extension candidates. Maximal degree in co-relation 1540. Up to 383 conditions per place. [2023-11-17 15:50:15,645 INFO L140 encePairwiseOnDemand]: 543/548 looper letters, 37 selfloop transitions, 2 changer transitions 26/65 dead transitions. [2023-11-17 15:50:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 65 transitions, 550 flow [2023-11-17 15:50:15,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:50:15,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:50:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1044 transitions. [2023-11-17 15:50:15,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.381021897810219 [2023-11-17 15:50:15,647 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1044 transitions. [2023-11-17 15:50:15,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1044 transitions. [2023-11-17 15:50:15,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:15,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1044 transitions. [2023-11-17 15:50:15,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.8) internal successors, (1044), 5 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,653 INFO L175 Difference]: Start difference. First operand has 74 places, 60 transitions, 450 flow. Second operand 5 states and 1044 transitions. [2023-11-17 15:50:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 65 transitions, 550 flow [2023-11-17 15:50:15,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 532 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:15,657 INFO L231 Difference]: Finished difference. Result has 71 places, 39 transitions, 254 flow [2023-11-17 15:50:15,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=71, PETRI_TRANSITIONS=39} [2023-11-17 15:50:15,658 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-11-17 15:50:15,658 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 39 transitions, 254 flow [2023-11-17 15:50:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:15,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:15,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:50:15,658 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:15,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1170040822, now seen corresponding path program 1 times [2023-11-17 15:50:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688789231] [2023-11-17 15:50:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:50:15,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:15,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688789231] [2023-11-17 15:50:15,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688789231] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:15,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:50:15,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 15:50:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458374247] [2023-11-17 15:50:15,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:15,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 15:50:15,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:15,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 15:50:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 15:50:15,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:50:15,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 39 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:15,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:50:15,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:15,793 INFO L124 PetriNetUnfolderBase]: 133/263 cut-off events. [2023-11-17 15:50:15,794 INFO L125 PetriNetUnfolderBase]: For 1088/1088 co-relation queries the response was YES. [2023-11-17 15:50:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 263 events. 133/263 cut-off events. For 1088/1088 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 896 event pairs, 79 based on Foata normal form. 12/274 useless extension candidates. Maximal degree in co-relation 957. Up to 188 conditions per place. [2023-11-17 15:50:15,795 INFO L140 encePairwiseOnDemand]: 543/548 looper letters, 26 selfloop transitions, 2 changer transitions 18/46 dead transitions. [2023-11-17 15:50:15,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 46 transitions, 338 flow [2023-11-17 15:50:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 15:50:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 15:50:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1042 transitions. [2023-11-17 15:50:15,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802919708029197 [2023-11-17 15:50:15,797 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1042 transitions. [2023-11-17 15:50:15,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1042 transitions. [2023-11-17 15:50:15,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:15,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1042 transitions. [2023-11-17 15:50:15,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.4) internal successors, (1042), 5 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 548.0) internal successors, (3288), 6 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,803 INFO L175 Difference]: Start difference. First operand has 71 places, 39 transitions, 254 flow. Second operand 5 states and 1042 transitions. [2023-11-17 15:50:15,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 46 transitions, 338 flow [2023-11-17 15:50:15,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 293 flow, removed 13 selfloop flow, removed 13 redundant places. [2023-11-17 15:50:15,804 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 132 flow [2023-11-17 15:50:15,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-11-17 15:50:15,805 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2023-11-17 15:50:15,805 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 132 flow [2023-11-17 15:50:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.8) internal successors, (1019), 5 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:15,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:15,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:50:15,806 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:15,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:15,806 INFO L85 PathProgramCache]: Analyzing trace with hash -745696678, now seen corresponding path program 1 times [2023-11-17 15:50:15,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:15,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694006587] [2023-11-17 15:50:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:15,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694006587] [2023-11-17 15:50:16,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694006587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371968723] [2023-11-17 15:50:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:16,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:16,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:16,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:16,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 15:50:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:16,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:50:16,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:16,327 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:16,362 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:16,434 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:16,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:16,928 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:16,928 INFO L378 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 48 treesize of output 37 [2023-11-17 15:50:16,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:16,938 INFO L378 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 1206 treesize of output 1090 [2023-11-17 15:50:16,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:16,953 INFO L378 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 262 treesize of output 255 [2023-11-17 15:50:16,962 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:16,962 INFO L378 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 246 treesize of output 223 [2023-11-17 15:50:17,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:17,049 INFO L378 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 48 treesize of output 37 [2023-11-17 15:50:17,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:17,058 INFO L378 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 598 treesize of output 546 [2023-11-17 15:50:17,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:17,072 INFO L378 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 262 treesize of output 239 [2023-11-17 15:50:17,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:17,081 INFO L378 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 230 treesize of output 223 [2023-11-17 15:50:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:17,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371968723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:17,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:17,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-11-17 15:50:17,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49501001] [2023-11-17 15:50:17,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:17,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 15:50:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 15:50:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=531, Unknown=33, NotChecked=0, Total=702 [2023-11-17 15:50:17,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:50:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 132 flow. Second operand has 27 states, 27 states have (on average 164.55555555555554) internal successors, (4443), 27 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:50:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:17,991 INFO L124 PetriNetUnfolderBase]: 294/521 cut-off events. [2023-11-17 15:50:17,991 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2023-11-17 15:50:17,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1577 conditions, 521 events. 294/521 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2090 event pairs, 38 based on Foata normal form. 16/536 useless extension candidates. Maximal degree in co-relation 1548. Up to 156 conditions per place. [2023-11-17 15:50:17,994 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 70 selfloop transitions, 19 changer transitions 0/89 dead transitions. [2023-11-17 15:50:17,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 89 transitions, 534 flow [2023-11-17 15:50:17,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:50:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:50:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2207 transitions. [2023-11-17 15:50:17,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3097978663672094 [2023-11-17 15:50:17,998 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2207 transitions. [2023-11-17 15:50:17,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2207 transitions. [2023-11-17 15:50:17,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:17,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2207 transitions. [2023-11-17 15:50:18,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 169.76923076923077) internal successors, (2207), 13 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:18,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:18,008 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:18,008 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 132 flow. Second operand 13 states and 2207 transitions. [2023-11-17 15:50:18,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 89 transitions, 534 flow [2023-11-17 15:50:18,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 461 flow, removed 33 selfloop flow, removed 7 redundant places. [2023-11-17 15:50:18,011 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 234 flow [2023-11-17 15:50:18,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=234, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-11-17 15:50:18,011 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-11-17 15:50:18,012 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 234 flow [2023-11-17 15:50:18,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 164.55555555555554) internal successors, (4443), 27 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:18,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:18,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:18,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 15:50:18,217 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 [2023-11-17 15:50:18,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:18,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1590765346, now seen corresponding path program 2 times [2023-11-17 15:50:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:18,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355225737] [2023-11-17 15:50:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:18,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355225737] [2023-11-17 15:50:18,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355225737] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:18,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698025369] [2023-11-17 15:50:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:18,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:18,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:18,607 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:18,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 15:50:18,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:18,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:50:18,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:18,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:19,006 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 15:50:19,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 95 [2023-11-17 15:50:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:19,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698025369] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:19,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:19,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 24 [2023-11-17 15:50:19,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128652238] [2023-11-17 15:50:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:19,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:50:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:50:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 15:50:19,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 548 [2023-11-17 15:50:19,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 234 flow. Second operand has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:19,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:19,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 548 [2023-11-17 15:50:19,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:19,457 INFO L124 PetriNetUnfolderBase]: 351/618 cut-off events. [2023-11-17 15:50:19,457 INFO L125 PetriNetUnfolderBase]: For 853/853 co-relation queries the response was YES. [2023-11-17 15:50:19,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2143 conditions, 618 events. 351/618 cut-off events. For 853/853 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2565 event pairs, 99 based on Foata normal form. 2/548 useless extension candidates. Maximal degree in co-relation 2110. Up to 325 conditions per place. [2023-11-17 15:50:19,460 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 63 selfloop transitions, 37 changer transitions 0/100 dead transitions. [2023-11-17 15:50:19,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 100 transitions, 728 flow [2023-11-17 15:50:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:50:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:50:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2370 transitions. [2023-11-17 15:50:19,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332678270634475 [2023-11-17 15:50:19,466 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2370 transitions. [2023-11-17 15:50:19,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2370 transitions. [2023-11-17 15:50:19,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:19,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2370 transitions. [2023-11-17 15:50:19,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.30769230769232) internal successors, (2370), 13 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:19,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:19,477 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:19,477 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 234 flow. Second operand 13 states and 2370 transitions. [2023-11-17 15:50:19,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 100 transitions, 728 flow [2023-11-17 15:50:19,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 100 transitions, 701 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 15:50:19,480 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 506 flow [2023-11-17 15:50:19,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=506, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2023-11-17 15:50:19,480 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-17 15:50:19,481 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 506 flow [2023-11-17 15:50:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:19,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:19,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:19,686 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 [2023-11-17 15:50:19,687 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:19,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1639864874, now seen corresponding path program 3 times [2023-11-17 15:50:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344570141] [2023-11-17 15:50:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:19,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:20,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:20,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344570141] [2023-11-17 15:50:20,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344570141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:20,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892454358] [2023-11-17 15:50:20,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:50:20,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:20,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:20,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:20,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 15:50:20,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:50:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:20,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:50:20,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:20,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:20,436 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 15:50:20,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 58 [2023-11-17 15:50:20,449 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:20,450 INFO L378 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 12 treesize of output 4 [2023-11-17 15:50:20,455 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:20,455 INFO L378 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 12 treesize of output 4 [2023-11-17 15:50:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:20,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892454358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:20,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:20,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-11-17 15:50:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243255323] [2023-11-17 15:50:20,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:20,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 15:50:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 15:50:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:50:20,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:50:20,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 506 flow. Second operand has 22 states, 22 states have (on average 173.72727272727272) internal successors, (3822), 22 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:20,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:20,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:50:20,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:20,895 INFO L124 PetriNetUnfolderBase]: 395/706 cut-off events. [2023-11-17 15:50:20,895 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2023-11-17 15:50:20,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3052 conditions, 706 events. 395/706 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3071 event pairs, 136 based on Foata normal form. 0/652 useless extension candidates. Maximal degree in co-relation 3013. Up to 379 conditions per place. [2023-11-17 15:50:20,899 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 78 selfloop transitions, 29 changer transitions 0/107 dead transitions. [2023-11-17 15:50:20,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 996 flow [2023-11-17 15:50:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:50:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:50:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1960 transitions. [2023-11-17 15:50:20,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32514930325149305 [2023-11-17 15:50:20,903 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1960 transitions. [2023-11-17 15:50:20,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1960 transitions. [2023-11-17 15:50:20,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:20,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1960 transitions. [2023-11-17 15:50:20,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.1818181818182) internal successors, (1960), 11 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:20,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:20,910 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:20,911 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 506 flow. Second operand 11 states and 1960 transitions. [2023-11-17 15:50:20,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 996 flow [2023-11-17 15:50:20,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 919 flow, removed 35 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:20,916 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 635 flow [2023-11-17 15:50:20,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=635, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-11-17 15:50:20,916 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 50 predicate places. [2023-11-17 15:50:20,916 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 635 flow [2023-11-17 15:50:20,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 173.72727272727272) internal successors, (3822), 22 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:20,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:20,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:20,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:21,122 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 [2023-11-17 15:50:21,123 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:21,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1925068600, now seen corresponding path program 4 times [2023-11-17 15:50:21,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:21,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265524202] [2023-11-17 15:50:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:21,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:21,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265524202] [2023-11-17 15:50:21,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265524202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:21,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312560366] [2023-11-17 15:50:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:50:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:21,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:21,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 15:50:21,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:50:21,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:21,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:50:21,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:21,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:21,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312560366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:21,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:21,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-17 15:50:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97414881] [2023-11-17 15:50:21,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:21,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:50:21,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:50:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-17 15:50:21,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 548 [2023-11-17 15:50:21,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 635 flow. Second operand has 9 states, 9 states have (on average 194.11111111111111) internal successors, (1747), 9 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:21,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:21,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 548 [2023-11-17 15:50:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:21,883 INFO L124 PetriNetUnfolderBase]: 423/770 cut-off events. [2023-11-17 15:50:21,883 INFO L125 PetriNetUnfolderBase]: For 2333/2333 co-relation queries the response was YES. [2023-11-17 15:50:21,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3444 conditions, 770 events. 423/770 cut-off events. For 2333/2333 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3524 event pairs, 133 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 3402. Up to 443 conditions per place. [2023-11-17 15:50:21,887 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 83 selfloop transitions, 27 changer transitions 0/110 dead transitions. [2023-11-17 15:50:21,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 110 transitions, 1041 flow [2023-11-17 15:50:21,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:50:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:50:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1605 transitions. [2023-11-17 15:50:21,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36610401459854014 [2023-11-17 15:50:21,890 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1605 transitions. [2023-11-17 15:50:21,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1605 transitions. [2023-11-17 15:50:21,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:21,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1605 transitions. [2023-11-17 15:50:21,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 200.625) internal successors, (1605), 8 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:21,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:21,896 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:21,896 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 635 flow. Second operand 8 states and 1605 transitions. [2023-11-17 15:50:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 110 transitions, 1041 flow [2023-11-17 15:50:21,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 982 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-17 15:50:21,902 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 688 flow [2023-11-17 15:50:21,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=688, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2023-11-17 15:50:21,903 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 51 predicate places. [2023-11-17 15:50:21,903 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 688 flow [2023-11-17 15:50:21,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.11111111111111) internal successors, (1747), 9 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:21,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:21,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:21,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 15:50:22,108 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 [2023-11-17 15:50:22,108 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:22,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2112802440, now seen corresponding path program 5 times [2023-11-17 15:50:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047692545] [2023-11-17 15:50:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:22,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047692545] [2023-11-17 15:50:22,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047692545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:22,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798641688] [2023-11-17 15:50:22,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:50:22,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:22,432 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:22,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 15:50:22,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:22,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:22,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:50:22,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:22,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:22,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798641688] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:22,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:22,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2023-11-17 15:50:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260153575] [2023-11-17 15:50:22,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:50:22,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:22,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:50:22,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-17 15:50:22,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 548 [2023-11-17 15:50:22,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 688 flow. Second operand has 9 states, 9 states have (on average 194.11111111111111) internal successors, (1747), 9 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:22,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:22,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 548 [2023-11-17 15:50:22,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:22,885 INFO L124 PetriNetUnfolderBase]: 415/742 cut-off events. [2023-11-17 15:50:22,885 INFO L125 PetriNetUnfolderBase]: For 2719/2719 co-relation queries the response was YES. [2023-11-17 15:50:22,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 742 events. 415/742 cut-off events. For 2719/2719 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3269 event pairs, 156 based on Foata normal form. 2/690 useless extension candidates. Maximal degree in co-relation 3433. Up to 467 conditions per place. [2023-11-17 15:50:22,890 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 71 selfloop transitions, 27 changer transitions 0/98 dead transitions. [2023-11-17 15:50:22,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 98 transitions, 994 flow [2023-11-17 15:50:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:50:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:50:22,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1593 transitions. [2023-11-17 15:50:22,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36336678832116787 [2023-11-17 15:50:22,892 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1593 transitions. [2023-11-17 15:50:22,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1593 transitions. [2023-11-17 15:50:22,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:22,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1593 transitions. [2023-11-17 15:50:22,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.125) internal successors, (1593), 8 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:22,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:22,896 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:22,896 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 688 flow. Second operand 8 states and 1593 transitions. [2023-11-17 15:50:22,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 98 transitions, 994 flow [2023-11-17 15:50:22,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 98 transitions, 954 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:22,903 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 708 flow [2023-11-17 15:50:22,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=708, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-11-17 15:50:22,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 55 predicate places. [2023-11-17 15:50:22,904 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 708 flow [2023-11-17 15:50:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 194.11111111111111) internal successors, (1747), 9 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:22,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:22,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:22,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:23,109 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 [2023-11-17 15:50:23,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:23,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1702076350, now seen corresponding path program 6 times [2023-11-17 15:50:23,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:23,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073314244] [2023-11-17 15:50:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:23,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:23,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073314244] [2023-11-17 15:50:23,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073314244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763155713] [2023-11-17 15:50:23,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:50:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:23,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:23,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 15:50:23,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 15:50:23,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:23,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:50:23,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:23,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:23,818 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:23,818 INFO L378 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 20 treesize of output 4 [2023-11-17 15:50:23,855 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:50:23,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-11-17 15:50:23,872 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:23,872 INFO L378 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 20 treesize of output 4 [2023-11-17 15:50:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763155713] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:23,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:23,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2023-11-17 15:50:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708408432] [2023-11-17 15:50:23,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:23,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:50:23,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:50:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:50:23,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 548 [2023-11-17 15:50:23,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 708 flow. Second operand has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:23,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:23,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 548 [2023-11-17 15:50:23,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:24,309 INFO L124 PetriNetUnfolderBase]: 407/714 cut-off events. [2023-11-17 15:50:24,309 INFO L125 PetriNetUnfolderBase]: For 2412/2412 co-relation queries the response was YES. [2023-11-17 15:50:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3332 conditions, 714 events. 407/714 cut-off events. For 2412/2412 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3096 event pairs, 108 based on Foata normal form. 2/662 useless extension candidates. Maximal degree in co-relation 3289. Up to 391 conditions per place. [2023-11-17 15:50:24,313 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 67 selfloop transitions, 47 changer transitions 0/114 dead transitions. [2023-11-17 15:50:24,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 1122 flow [2023-11-17 15:50:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:50:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:50:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2369 transitions. [2023-11-17 15:50:24,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33253790005614825 [2023-11-17 15:50:24,316 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2369 transitions. [2023-11-17 15:50:24,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2369 transitions. [2023-11-17 15:50:24,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:24,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2369 transitions. [2023-11-17 15:50:24,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.23076923076923) internal successors, (2369), 13 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:24,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:24,324 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:24,324 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 708 flow. Second operand 13 states and 2369 transitions. [2023-11-17 15:50:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 1122 flow [2023-11-17 15:50:24,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 1070 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:24,334 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 788 flow [2023-11-17 15:50:24,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=788, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2023-11-17 15:50:24,335 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 63 predicate places. [2023-11-17 15:50:24,335 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 788 flow [2023-11-17 15:50:24,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:24,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:24,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:24,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 15:50:24,540 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 [2023-11-17 15:50:24,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:24,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1508669460, now seen corresponding path program 7 times [2023-11-17 15:50:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257473020] [2023-11-17 15:50:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:24,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:24,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257473020] [2023-11-17 15:50:24,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257473020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:24,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350899835] [2023-11-17 15:50:24,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:50:24,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:24,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:24,902 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:24,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 15:50:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:24,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-17 15:50:24,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:25,088 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:25,113 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:25,148 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:25,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:25,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,523 INFO L378 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 48 treesize of output 37 [2023-11-17 15:50:25,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,538 INFO L378 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 598 treesize of output 546 [2023-11-17 15:50:25,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,550 INFO L378 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 262 treesize of output 239 [2023-11-17 15:50:25,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,563 INFO L378 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 230 treesize of output 223 [2023-11-17 15:50:25,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,612 INFO L378 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 48 treesize of output 37 [2023-11-17 15:50:25,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,619 INFO L378 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 598 treesize of output 546 [2023-11-17 15:50:25,630 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,630 INFO L378 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 262 treesize of output 239 [2023-11-17 15:50:25,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:25,639 INFO L378 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 230 treesize of output 223 [2023-11-17 15:50:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:25,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350899835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:25,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:25,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-11-17 15:50:25,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033985944] [2023-11-17 15:50:25,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:25,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 15:50:25,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 15:50:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=686, Unknown=10, NotChecked=0, Total=812 [2023-11-17 15:50:25,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:50:25,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 788 flow. Second operand has 29 states, 29 states have (on average 164.51724137931035) internal successors, (4771), 29 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:25,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:25,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:50:25,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:26,536 INFO L124 PetriNetUnfolderBase]: 544/971 cut-off events. [2023-11-17 15:50:26,536 INFO L125 PetriNetUnfolderBase]: For 3880/3880 co-relation queries the response was YES. [2023-11-17 15:50:26,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4746 conditions, 971 events. 544/971 cut-off events. For 3880/3880 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4634 event pairs, 107 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 4699. Up to 439 conditions per place. [2023-11-17 15:50:26,542 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 66 selfloop transitions, 77 changer transitions 0/143 dead transitions. [2023-11-17 15:50:26,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 143 transitions, 1556 flow [2023-11-17 15:50:26,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 15:50:26,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 15:50:26,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2352 transitions. [2023-11-17 15:50:26,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30656934306569344 [2023-11-17 15:50:26,544 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2352 transitions. [2023-11-17 15:50:26,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2352 transitions. [2023-11-17 15:50:26,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:26,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2352 transitions. [2023-11-17 15:50:26,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:26,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:26,551 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:26,551 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 788 flow. Second operand 14 states and 2352 transitions. [2023-11-17 15:50:26,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 143 transitions, 1556 flow [2023-11-17 15:50:26,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 1440 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-17 15:50:26,561 INFO L231 Difference]: Finished difference. Result has 96 places, 109 transitions, 1238 flow [2023-11-17 15:50:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1238, PETRI_PLACES=96, PETRI_TRANSITIONS=109} [2023-11-17 15:50:26,561 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2023-11-17 15:50:26,562 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 109 transitions, 1238 flow [2023-11-17 15:50:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 164.51724137931035) internal successors, (4771), 29 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:26,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:26,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 15:50:26,768 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:26,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash 792926146, now seen corresponding path program 8 times [2023-11-17 15:50:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:26,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621123319] [2023-11-17 15:50:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:27,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621123319] [2023-11-17 15:50:27,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621123319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:27,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72610177] [2023-11-17 15:50:27,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:27,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:27,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:27,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:27,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 15:50:27,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:27,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:50:27,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:27,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:27,532 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:27,533 INFO L378 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 20 treesize of output 4 [2023-11-17 15:50:27,569 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:50:27,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-11-17 15:50:27,585 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:27,585 INFO L378 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 20 treesize of output 4 [2023-11-17 15:50:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:27,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72610177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:27,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:27,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-11-17 15:50:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671438319] [2023-11-17 15:50:27,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:27,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 15:50:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 15:50:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:50:27,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:50:27,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 109 transitions, 1238 flow. Second operand has 23 states, 23 states have (on average 173.7826086956522) internal successors, (3997), 23 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:27,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:27,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:50:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:28,010 INFO L124 PetriNetUnfolderBase]: 528/955 cut-off events. [2023-11-17 15:50:28,010 INFO L125 PetriNetUnfolderBase]: For 6285/6285 co-relation queries the response was YES. [2023-11-17 15:50:28,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5303 conditions, 955 events. 528/955 cut-off events. For 6285/6285 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4536 event pairs, 145 based on Foata normal form. 14/909 useless extension candidates. Maximal degree in co-relation 5251. Up to 541 conditions per place. [2023-11-17 15:50:28,016 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 104 selfloop transitions, 43 changer transitions 0/147 dead transitions. [2023-11-17 15:50:28,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 147 transitions, 1802 flow [2023-11-17 15:50:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:50:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:50:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1959 transitions. [2023-11-17 15:50:28,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3249834107498341 [2023-11-17 15:50:28,018 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1959 transitions. [2023-11-17 15:50:28,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1959 transitions. [2023-11-17 15:50:28,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:28,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1959 transitions. [2023-11-17 15:50:28,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 178.0909090909091) internal successors, (1959), 11 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:28,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:28,024 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:28,024 INFO L175 Difference]: Start difference. First operand has 96 places, 109 transitions, 1238 flow. Second operand 11 states and 1959 transitions. [2023-11-17 15:50:28,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 147 transitions, 1802 flow [2023-11-17 15:50:28,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 147 transitions, 1709 flow, removed 22 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:28,041 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 1410 flow [2023-11-17 15:50:28,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1410, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2023-11-17 15:50:28,042 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 79 predicate places. [2023-11-17 15:50:28,042 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 1410 flow [2023-11-17 15:50:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 173.7826086956522) internal successors, (3997), 23 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:28,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:28,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:28,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:28,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 15:50:28,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:28,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1052909768, now seen corresponding path program 9 times [2023-11-17 15:50:28,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:28,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930523732] [2023-11-17 15:50:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:28,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:28,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930523732] [2023-11-17 15:50:28,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930523732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:28,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241011617] [2023-11-17 15:50:28,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:50:28,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:28,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:28,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:28,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 15:50:28,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:50:28,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:28,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:50:28,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:28,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:28,864 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 15:50:28,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 95 [2023-11-17 15:50:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:29,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241011617] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:29,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:29,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 24 [2023-11-17 15:50:29,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961505709] [2023-11-17 15:50:29,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:29,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:50:29,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:29,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:50:29,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-17 15:50:29,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 548 [2023-11-17 15:50:29,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 1410 flow. Second operand has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:29,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:29,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 548 [2023-11-17 15:50:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:29,327 INFO L124 PetriNetUnfolderBase]: 529/958 cut-off events. [2023-11-17 15:50:29,328 INFO L125 PetriNetUnfolderBase]: For 6592/6592 co-relation queries the response was YES. [2023-11-17 15:50:29,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5508 conditions, 958 events. 529/958 cut-off events. For 6592/6592 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4589 event pairs, 117 based on Foata normal form. 2/906 useless extension candidates. Maximal degree in co-relation 5452. Up to 463 conditions per place. [2023-11-17 15:50:29,334 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 73 selfloop transitions, 80 changer transitions 0/153 dead transitions. [2023-11-17 15:50:29,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1948 flow [2023-11-17 15:50:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:50:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:50:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2366 transitions. [2023-11-17 15:50:29,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33211678832116787 [2023-11-17 15:50:29,337 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2366 transitions. [2023-11-17 15:50:29,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2366 transitions. [2023-11-17 15:50:29,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:29,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2366 transitions. [2023-11-17 15:50:29,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 182.0) internal successors, (2366), 13 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:29,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:29,343 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:29,343 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 1410 flow. Second operand 13 states and 2366 transitions. [2023-11-17 15:50:29,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1948 flow [2023-11-17 15:50:29,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1866 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:29,369 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 1629 flow [2023-11-17 15:50:29,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1629, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2023-11-17 15:50:29,369 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 88 predicate places. [2023-11-17 15:50:29,369 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 1629 flow [2023-11-17 15:50:29,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 177.9) internal successors, (1779), 10 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:29,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:29,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:29,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-17 15:50:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:29,575 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:29,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1653140944, now seen corresponding path program 10 times [2023-11-17 15:50:29,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:29,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619234741] [2023-11-17 15:50:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:29,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:30,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:30,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619234741] [2023-11-17 15:50:30,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619234741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:30,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507482944] [2023-11-17 15:50:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:50:30,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:30,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:30,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:30,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 15:50:30,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:50:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:30,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 15:50:30,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:30,583 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:30,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507482944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:30,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:30,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 18 [2023-11-17 15:50:30,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701602037] [2023-11-17 15:50:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:30,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 15:50:30,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 15:50:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 15:50:30,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 548 [2023-11-17 15:50:30,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 1629 flow. Second operand has 8 states, 8 states have (on average 194.375) internal successors, (1555), 8 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:30,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:30,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 548 [2023-11-17 15:50:30,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:30,907 INFO L124 PetriNetUnfolderBase]: 522/933 cut-off events. [2023-11-17 15:50:30,908 INFO L125 PetriNetUnfolderBase]: For 6660/6660 co-relation queries the response was YES. [2023-11-17 15:50:30,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 933 events. 522/933 cut-off events. For 6660/6660 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4360 event pairs, 145 based on Foata normal form. 2/881 useless extension candidates. Maximal degree in co-relation 5431. Up to 541 conditions per place. [2023-11-17 15:50:30,927 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 94 selfloop transitions, 46 changer transitions 0/140 dead transitions. [2023-11-17 15:50:30,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 140 transitions, 1956 flow [2023-11-17 15:50:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:50:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:50:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1592 transitions. [2023-11-17 15:50:30,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36313868613138683 [2023-11-17 15:50:30,929 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1592 transitions. [2023-11-17 15:50:30,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1592 transitions. [2023-11-17 15:50:30,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:30,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1592 transitions. [2023-11-17 15:50:30,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:30,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:30,933 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:30,933 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 1629 flow. Second operand 8 states and 1592 transitions. [2023-11-17 15:50:30,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 140 transitions, 1956 flow [2023-11-17 15:50:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 140 transitions, 1887 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:30,955 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 1660 flow [2023-11-17 15:50:30,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2023-11-17 15:50:30,955 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 92 predicate places. [2023-11-17 15:50:30,955 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 1660 flow [2023-11-17 15:50:30,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.375) internal successors, (1555), 8 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:30,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:30,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:30,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 15:50:31,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 15:50:31,161 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:31,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -487824800, now seen corresponding path program 11 times [2023-11-17 15:50:31,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:31,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569403311] [2023-11-17 15:50:31,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:31,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:31,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569403311] [2023-11-17 15:50:31,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569403311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:31,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352104876] [2023-11-17 15:50:31,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:50:31,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:31,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:31,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 15:50:31,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:31,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:31,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 15:50:31,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:31,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 15:50:31,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:50:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:31,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:31,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352104876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:31,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:31,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2023-11-17 15:50:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080772976] [2023-11-17 15:50:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:31,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:50:31,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:31,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:50:31,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-11-17 15:50:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:50:31,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 1660 flow. Second operand has 10 states, 10 states have (on average 188.9) internal successors, (1889), 10 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:31,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:31,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:50:31,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:32,058 INFO L124 PetriNetUnfolderBase]: 550/997 cut-off events. [2023-11-17 15:50:32,058 INFO L125 PetriNetUnfolderBase]: For 7875/7875 co-relation queries the response was YES. [2023-11-17 15:50:32,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5922 conditions, 997 events. 550/997 cut-off events. For 7875/7875 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4825 event pairs, 188 based on Foata normal form. 16/959 useless extension candidates. Maximal degree in co-relation 5864. Up to 563 conditions per place. [2023-11-17 15:50:32,065 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 113 selfloop transitions, 49 changer transitions 0/162 dead transitions. [2023-11-17 15:50:32,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 162 transitions, 2316 flow [2023-11-17 15:50:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:50:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:50:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1746 transitions. [2023-11-17 15:50:32,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354014598540146 [2023-11-17 15:50:32,068 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1746 transitions. [2023-11-17 15:50:32,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1746 transitions. [2023-11-17 15:50:32,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:32,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1746 transitions. [2023-11-17 15:50:32,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.0) internal successors, (1746), 9 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:32,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:32,073 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:32,073 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 1660 flow. Second operand 9 states and 1746 transitions. [2023-11-17 15:50:32,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 162 transitions, 2316 flow [2023-11-17 15:50:32,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 162 transitions, 2220 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:32,096 INFO L231 Difference]: Finished difference. Result has 122 places, 130 transitions, 1843 flow [2023-11-17 15:50:32,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=122, PETRI_TRANSITIONS=130} [2023-11-17 15:50:32,097 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 97 predicate places. [2023-11-17 15:50:32,097 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 130 transitions, 1843 flow [2023-11-17 15:50:32,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 188.9) internal successors, (1889), 10 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:32,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:32,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:32,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:32,306 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:32,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 198556080, now seen corresponding path program 12 times [2023-11-17 15:50:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:32,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067347657] [2023-11-17 15:50:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:32,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:32,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:32,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067347657] [2023-11-17 15:50:32,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067347657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:32,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232872278] [2023-11-17 15:50:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:50:32,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:32,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:32,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 15:50:32,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 15:50:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:32,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 15:50:32,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:32,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:50:32,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:50:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:33,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:33,879 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~a2~0.offset))) (and (or (forall ((~a2~0.base Int) (v_ArrVal_576 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_576) ~a2~0.base) .cse0) |c_thread1Thread1of1ForFork0_#t~mem1#1|))) (and (= c_~res1~0 0) (= c_~n2~0 c_~n1~0)) (and (<= 1 c_~n2~0) (<= 1 c_~n1~0)) (and (<= (+ c_~res1~0 1) 0) (<= (+ c_~n1~0 1) c_~n2~0)) (and (<= 1 c_~res1~0) (<= (+ c_~n2~0 1) c_~n1~0))) (or (< c_~n1~0 1) (let ((.cse1 (< c_~res1~0 0))) (and (or .cse1 (forall ((~a2~0.base Int) (v_ArrVal_576 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_576))) (let ((.cse4 (select .cse5 ~a2~0.base))) (let ((.cse3 (select .cse4 c_~a2~0.offset)) (.cse2 (select (select .cse5 c_~a1~0.base) c_~a1~0.offset))) (or (= .cse2 .cse3) (< (+ 2147483647 .cse2) .cse3) (< .cse3 .cse2) (not (= (select .cse4 .cse0) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))))) (or (< 0 c_~res1~0) (and (or .cse1 (forall ((~a2~0.base Int) (v_ArrVal_576 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_576))) (let ((.cse8 (select .cse9 ~a2~0.base))) (let ((.cse7 (select .cse8 c_~a2~0.offset)) (.cse6 (select (select .cse9 c_~a1~0.base) c_~a1~0.offset))) (or (= .cse6 .cse7) (< (+ 2147483647 .cse6) .cse7) (< (+ .cse7 2147483648) .cse6) (not (= (select .cse8 .cse0) |c_thread1Thread1of1ForFork0_#t~mem1#1|)))))))) (forall ((~a2~0.base Int) (v_ArrVal_576 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_576))) (let ((.cse12 (select .cse13 ~a2~0.base))) (let ((.cse11 (select .cse12 c_~a2~0.offset)) (.cse10 (select (select .cse13 c_~a1~0.base) c_~a1~0.offset))) (or (= .cse10 .cse11) (< .cse10 .cse11) (< (+ .cse11 2147483648) .cse10) (not (= (select .cse12 .cse0) |c_thread1Thread1of1ForFork0_#t~mem1#1|))))))))))) (< c_~n2~0 1)))) is different from false [2023-11-17 15:50:33,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:33,914 INFO L378 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 48 treesize of output 36 [2023-11-17 15:50:33,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-11-17 15:50:33,984 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 15:50:33,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 233 [2023-11-17 15:50:34,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:34,005 INFO L378 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 188 treesize of output 186 [2023-11-17 15:50:34,484 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 15:50:34,490 INFO L349 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2023-11-17 15:50:34,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 144 treesize of output 1 [2023-11-17 15:50:34,542 INFO L349 Elim1Store]: treesize reduction 15, result has 78.3 percent of original size [2023-11-17 15:50:34,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 233 [2023-11-17 15:50:34,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:34,596 INFO L378 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 188 treesize of output 186 [2023-11-17 15:50:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:35,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232872278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:35,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:35,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-11-17 15:50:35,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364514720] [2023-11-17 15:50:35,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:35,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:50:35,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:35,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:50:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=611, Unknown=1, NotChecked=50, Total=756 [2023-11-17 15:50:35,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 548 [2023-11-17 15:50:35,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 130 transitions, 1843 flow. Second operand has 28 states, 28 states have (on average 162.03571428571428) internal successors, (4537), 28 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:35,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:35,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 548 [2023-11-17 15:50:35,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:36,198 INFO L124 PetriNetUnfolderBase]: 697/1238 cut-off events. [2023-11-17 15:50:36,198 INFO L125 PetriNetUnfolderBase]: For 9303/9303 co-relation queries the response was YES. [2023-11-17 15:50:36,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7455 conditions, 1238 events. 697/1238 cut-off events. For 9303/9303 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6236 event pairs, 68 based on Foata normal form. 16/1164 useless extension candidates. Maximal degree in co-relation 7393. Up to 367 conditions per place. [2023-11-17 15:50:36,204 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 160 selfloop transitions, 80 changer transitions 0/240 dead transitions. [2023-11-17 15:50:36,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 240 transitions, 3302 flow [2023-11-17 15:50:36,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 15:50:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 15:50:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3000 transitions. [2023-11-17 15:50:36,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30413625304136255 [2023-11-17 15:50:36,207 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3000 transitions. [2023-11-17 15:50:36,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3000 transitions. [2023-11-17 15:50:36,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:36,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3000 transitions. [2023-11-17 15:50:36,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 166.66666666666666) internal successors, (3000), 18 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:36,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 548.0) internal successors, (10412), 19 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:36,215 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 548.0) internal successors, (10412), 19 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:36,215 INFO L175 Difference]: Start difference. First operand has 122 places, 130 transitions, 1843 flow. Second operand 18 states and 3000 transitions. [2023-11-17 15:50:36,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 240 transitions, 3302 flow [2023-11-17 15:50:36,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 240 transitions, 3238 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-11-17 15:50:36,243 INFO L231 Difference]: Finished difference. Result has 142 places, 156 transitions, 2415 flow [2023-11-17 15:50:36,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2415, PETRI_PLACES=142, PETRI_TRANSITIONS=156} [2023-11-17 15:50:36,243 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 117 predicate places. [2023-11-17 15:50:36,243 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 156 transitions, 2415 flow [2023-11-17 15:50:36,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 162.03571428571428) internal successors, (4537), 28 states have internal predecessors, (4537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:36,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:36,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:36,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:36,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:36,449 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:36,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash 364508624, now seen corresponding path program 13 times [2023-11-17 15:50:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712989263] [2023-11-17 15:50:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:36,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:36,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712989263] [2023-11-17 15:50:36,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712989263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:36,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749208662] [2023-11-17 15:50:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:50:36,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:36,842 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:36,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 15:50:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:36,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 15:50:36,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:36,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-11-17 15:50:37,051 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:37,085 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:37,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:50:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:37,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:37,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:37,729 INFO L378 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 191 treesize of output 107 [2023-11-17 15:50:37,742 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:37,743 INFO L378 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 2126 treesize of output 1886 [2023-11-17 15:50:37,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:37,787 INFO L378 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 922 treesize of output 826 [2023-11-17 15:50:37,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:37,805 INFO L378 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 818 treesize of output 766 [2023-11-17 15:50:38,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,144 INFO L378 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 45 treesize of output 34 [2023-11-17 15:50:38,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,153 INFO L378 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 302 treesize of output 266 [2023-11-17 15:50:38,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,163 INFO L378 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 122 treesize of output 119 [2023-11-17 15:50:38,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-11-17 15:50:38,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,225 INFO L378 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 45 treesize of output 34 [2023-11-17 15:50:38,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,234 INFO L378 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 146 treesize of output 134 [2023-11-17 15:50:38,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:38,241 INFO L378 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 122 treesize of output 119 [2023-11-17 15:50:38,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-11-17 15:50:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:38,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749208662] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:38,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:38,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-11-17 15:50:38,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788258000] [2023-11-17 15:50:38,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:38,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 15:50:38,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 15:50:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=766, Unknown=21, NotChecked=0, Total=930 [2023-11-17 15:50:38,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:50:38,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 156 transitions, 2415 flow. Second operand has 31 states, 31 states have (on average 164.51612903225808) internal successors, (5100), 31 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:38,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:38,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:50:38,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:39,499 INFO L124 PetriNetUnfolderBase]: 743/1306 cut-off events. [2023-11-17 15:50:39,499 INFO L125 PetriNetUnfolderBase]: For 14577/14577 co-relation queries the response was YES. [2023-11-17 15:50:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8483 conditions, 1306 events. 743/1306 cut-off events. For 14577/14577 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6588 event pairs, 80 based on Foata normal form. 10/1316 useless extension candidates. Maximal degree in co-relation 8413. Up to 427 conditions per place. [2023-11-17 15:50:39,510 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 136 selfloop transitions, 90 changer transitions 0/226 dead transitions. [2023-11-17 15:50:39,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 226 transitions, 3516 flow [2023-11-17 15:50:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 15:50:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 15:50:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2875 transitions. [2023-11-17 15:50:39,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3086088449978532 [2023-11-17 15:50:39,514 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2875 transitions. [2023-11-17 15:50:39,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2875 transitions. [2023-11-17 15:50:39,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:39,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2875 transitions. [2023-11-17 15:50:39,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 169.11764705882354) internal successors, (2875), 17 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:39,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:39,522 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:39,522 INFO L175 Difference]: Start difference. First operand has 142 places, 156 transitions, 2415 flow. Second operand 17 states and 2875 transitions. [2023-11-17 15:50:39,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 226 transitions, 3516 flow [2023-11-17 15:50:39,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 226 transitions, 3360 flow, removed 54 selfloop flow, removed 9 redundant places. [2023-11-17 15:50:39,565 INFO L231 Difference]: Finished difference. Result has 153 places, 166 transitions, 2662 flow [2023-11-17 15:50:39,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=2189, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2662, PETRI_PLACES=153, PETRI_TRANSITIONS=166} [2023-11-17 15:50:39,565 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-11-17 15:50:39,565 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 166 transitions, 2662 flow [2023-11-17 15:50:39,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 164.51612903225808) internal successors, (5100), 31 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:39,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:39,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:39,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:39,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:39,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:39,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1477366, now seen corresponding path program 14 times [2023-11-17 15:50:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465274448] [2023-11-17 15:50:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:40,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465274448] [2023-11-17 15:50:40,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465274448] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921678091] [2023-11-17 15:50:40,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:40,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:40,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:40,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:40,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 15:50:40,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:40,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 15:50:40,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:40,395 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:40,434 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:50:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:50:40,600 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 15:50:40,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2023-11-17 15:50:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:40,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:41,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,039 INFO L378 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 42 treesize of output 31 [2023-11-17 15:50:41,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,046 INFO L378 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 70 treesize of output 66 [2023-11-17 15:50:41,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,053 INFO L378 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 54 treesize of output 55 [2023-11-17 15:50:41,084 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,084 INFO L378 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 188 treesize of output 104 [2023-11-17 15:50:41,096 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:50:41,097 INFO L378 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 3750 treesize of output 3350 [2023-11-17 15:50:41,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,134 INFO L378 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 800 treesize of output 712 [2023-11-17 15:50:41,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:41,151 INFO L378 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 758 treesize of output 710 [2023-11-17 15:50:42,880 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:42,880 INFO L378 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 42 treesize of output 31 [2023-11-17 15:50:42,889 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:42,889 INFO L378 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 70 treesize of output 66 [2023-11-17 15:50:42,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:42,895 INFO L378 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 54 treesize of output 55 [2023-11-17 15:50:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:43,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921678091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:43,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:43,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2023-11-17 15:50:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432561019] [2023-11-17 15:50:43,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:43,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 15:50:43,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:43,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 15:50:43,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=796, Unknown=9, NotChecked=0, Total=930 [2023-11-17 15:50:43,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:50:43,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 166 transitions, 2662 flow. Second operand has 31 states, 31 states have (on average 164.6451612903226) internal successors, (5104), 31 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:43,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:43,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:50:43,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:43,658 INFO L124 PetriNetUnfolderBase]: 707/1238 cut-off events. [2023-11-17 15:50:43,658 INFO L125 PetriNetUnfolderBase]: For 15051/15051 co-relation queries the response was YES. [2023-11-17 15:50:43,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8331 conditions, 1238 events. 707/1238 cut-off events. For 15051/15051 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6146 event pairs, 86 based on Foata normal form. 26/1264 useless extension candidates. Maximal degree in co-relation 8260. Up to 691 conditions per place. [2023-11-17 15:50:43,665 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 124 selfloop transitions, 65 changer transitions 0/189 dead transitions. [2023-11-17 15:50:43,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 189 transitions, 3179 flow [2023-11-17 15:50:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:50:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:50:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1856 transitions. [2023-11-17 15:50:43,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30789648307896483 [2023-11-17 15:50:43,684 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1856 transitions. [2023-11-17 15:50:43,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1856 transitions. [2023-11-17 15:50:43,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:43,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1856 transitions. [2023-11-17 15:50:43,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.72727272727272) internal successors, (1856), 11 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:43,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:43,689 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:43,689 INFO L175 Difference]: Start difference. First operand has 153 places, 166 transitions, 2662 flow. Second operand 11 states and 1856 transitions. [2023-11-17 15:50:43,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 189 transitions, 3179 flow [2023-11-17 15:50:43,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 189 transitions, 2975 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-11-17 15:50:43,729 INFO L231 Difference]: Finished difference. Result has 149 places, 160 transitions, 2525 flow [2023-11-17 15:50:43,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=2346, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2525, PETRI_PLACES=149, PETRI_TRANSITIONS=160} [2023-11-17 15:50:43,729 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 124 predicate places. [2023-11-17 15:50:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 160 transitions, 2525 flow [2023-11-17 15:50:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 164.6451612903226) internal successors, (5104), 31 states have internal predecessors, (5104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:50:43,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 15:50:43,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:43,935 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:43,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1910691056, now seen corresponding path program 1 times [2023-11-17 15:50:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860905629] [2023-11-17 15:50:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:43,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:50:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860905629] [2023-11-17 15:50:44,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860905629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074220149] [2023-11-17 15:50:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:44,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:44,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:44,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:44,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 15:50:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:44,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 15:50:44,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:44,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:44,471 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:50:44,471 INFO L378 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 145 treesize of output 125 [2023-11-17 15:50:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074220149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:50:44,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:50:44,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2023-11-17 15:50:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083986802] [2023-11-17 15:50:44,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:50:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 15:50:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 15:50:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2023-11-17 15:50:44,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:50:44,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 160 transitions, 2525 flow. Second operand has 27 states, 27 states have (on average 184.7037037037037) internal successors, (4987), 27 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:44,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:44,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:50:44,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:45,775 INFO L124 PetriNetUnfolderBase]: 2114/3770 cut-off events. [2023-11-17 15:50:45,775 INFO L125 PetriNetUnfolderBase]: For 45008/45008 co-relation queries the response was YES. [2023-11-17 15:50:45,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3770 events. 2114/3770 cut-off events. For 45008/45008 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24385 event pairs, 329 based on Foata normal form. 116/3886 useless extension candidates. Maximal degree in co-relation 24116. Up to 1228 conditions per place. [2023-11-17 15:50:45,801 INFO L140 encePairwiseOnDemand]: 533/548 looper letters, 438 selfloop transitions, 117 changer transitions 20/575 dead transitions. [2023-11-17 15:50:45,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 575 transitions, 9701 flow [2023-11-17 15:50:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 15:50:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 15:50:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 4368 transitions. [2023-11-17 15:50:45,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34655664868295777 [2023-11-17 15:50:45,804 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 4368 transitions. [2023-11-17 15:50:45,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 4368 transitions. [2023-11-17 15:50:45,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:45,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 4368 transitions. [2023-11-17 15:50:45,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 189.91304347826087) internal successors, (4368), 23 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:45,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 548.0) internal successors, (13152), 24 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:45,904 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 548.0) internal successors, (13152), 24 states have internal predecessors, (13152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:45,904 INFO L175 Difference]: Start difference. First operand has 149 places, 160 transitions, 2525 flow. Second operand 23 states and 4368 transitions. [2023-11-17 15:50:45,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 575 transitions, 9701 flow [2023-11-17 15:50:46,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 575 transitions, 9166 flow, removed 75 selfloop flow, removed 11 redundant places. [2023-11-17 15:50:46,101 INFO L231 Difference]: Finished difference. Result has 172 places, 277 transitions, 4685 flow [2023-11-17 15:50:46,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4685, PETRI_PLACES=172, PETRI_TRANSITIONS=277} [2023-11-17 15:50:46,102 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 147 predicate places. [2023-11-17 15:50:46,102 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 277 transitions, 4685 flow [2023-11-17 15:50:46,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 184.7037037037037) internal successors, (4987), 27 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:46,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:46,103 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] [2023-11-17 15:50:46,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-17 15:50:46,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 15:50:46,307 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:46,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:46,307 INFO L85 PathProgramCache]: Analyzing trace with hash 777431674, now seen corresponding path program 1 times [2023-11-17 15:50:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:46,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987048030] [2023-11-17 15:50:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:46,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987048030] [2023-11-17 15:50:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987048030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277302147] [2023-11-17 15:50:46,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:46,941 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:46,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 15:50:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:47,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 15:50:47,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:47,179 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:47,215 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:47,256 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:47,476 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:50:47,476 INFO L378 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 [2023-11-17 15:50:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:47,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:50:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:48,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277302147] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:48,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:50:48,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 33 [2023-11-17 15:50:48,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968783406] [2023-11-17 15:50:48,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:48,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:50:48,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:50:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2023-11-17 15:50:48,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 548 [2023-11-17 15:50:48,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 277 transitions, 4685 flow. Second operand has 11 states, 11 states have (on average 172.8181818181818) internal successors, (1901), 11 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:48,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:48,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 548 [2023-11-17 15:50:48,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:49,134 INFO L124 PetriNetUnfolderBase]: 2412/4332 cut-off events. [2023-11-17 15:50:49,135 INFO L125 PetriNetUnfolderBase]: For 59433/59433 co-relation queries the response was YES. [2023-11-17 15:50:49,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31916 conditions, 4332 events. 2412/4332 cut-off events. For 59433/59433 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29055 event pairs, 771 based on Foata normal form. 3/4335 useless extension candidates. Maximal degree in co-relation 31468. Up to 3392 conditions per place. [2023-11-17 15:50:49,163 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 312 selfloop transitions, 54 changer transitions 10/376 dead transitions. [2023-11-17 15:50:49,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 376 transitions, 6926 flow [2023-11-17 15:50:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:50:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:50:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1938 transitions. [2023-11-17 15:50:49,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3214996682149967 [2023-11-17 15:50:49,165 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1938 transitions. [2023-11-17 15:50:49,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1938 transitions. [2023-11-17 15:50:49,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:49,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1938 transitions. [2023-11-17 15:50:49,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 176.1818181818182) internal successors, (1938), 11 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:49,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:49,170 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:49,170 INFO L175 Difference]: Start difference. First operand has 172 places, 277 transitions, 4685 flow. Second operand 11 states and 1938 transitions. [2023-11-17 15:50:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 376 transitions, 6926 flow [2023-11-17 15:50:49,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 376 transitions, 6854 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-11-17 15:50:49,438 INFO L231 Difference]: Finished difference. Result has 185 places, 306 transitions, 5336 flow [2023-11-17 15:50:49,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5336, PETRI_PLACES=185, PETRI_TRANSITIONS=306} [2023-11-17 15:50:49,438 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 160 predicate places. [2023-11-17 15:50:49,439 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 306 transitions, 5336 flow [2023-11-17 15:50:49,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.8181818181818) internal successors, (1901), 11 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:49,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:49,439 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] [2023-11-17 15:50:49,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:49,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 15:50:49,643 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:49,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:49,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2007705436, now seen corresponding path program 2 times [2023-11-17 15:50:49,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:49,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502274898] [2023-11-17 15:50:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:49,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:50,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502274898] [2023-11-17 15:50:50,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502274898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:50,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738012108] [2023-11-17 15:50:50,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:50:50,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:50,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:50,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:50,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 15:50:50,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:50:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:50,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:50:50,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:50,440 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:50:50,441 INFO L378 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 [2023-11-17 15:50:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:50,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738012108] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:50,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:50,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2023-11-17 15:50:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638601159] [2023-11-17 15:50:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:50,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:50:50,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:50:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:50:50,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:50:50,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 306 transitions, 5336 flow. Second operand has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:50,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:50,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:50:50,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:51,412 INFO L124 PetriNetUnfolderBase]: 2509/4570 cut-off events. [2023-11-17 15:50:51,413 INFO L125 PetriNetUnfolderBase]: For 66555/66555 co-relation queries the response was YES. [2023-11-17 15:50:51,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34071 conditions, 4570 events. 2509/4570 cut-off events. For 66555/66555 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 31682 event pairs, 706 based on Foata normal form. 30/4600 useless extension candidates. Maximal degree in co-relation 33810. Up to 2675 conditions per place. [2023-11-17 15:50:51,450 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 268 selfloop transitions, 90 changer transitions 11/369 dead transitions. [2023-11-17 15:50:51,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 369 transitions, 6775 flow [2023-11-17 15:50:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:50:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:50:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2093 transitions. [2023-11-17 15:50:51,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34721300597213006 [2023-11-17 15:50:51,452 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2093 transitions. [2023-11-17 15:50:51,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2093 transitions. [2023-11-17 15:50:51,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:51,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2093 transitions. [2023-11-17 15:50:51,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.27272727272728) internal successors, (2093), 11 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:51,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:51,457 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:51,457 INFO L175 Difference]: Start difference. First operand has 185 places, 306 transitions, 5336 flow. Second operand 11 states and 2093 transitions. [2023-11-17 15:50:51,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 369 transitions, 6775 flow [2023-11-17 15:50:51,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 369 transitions, 6731 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:51,755 INFO L231 Difference]: Finished difference. Result has 191 places, 314 transitions, 5641 flow [2023-11-17 15:50:51,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5641, PETRI_PLACES=191, PETRI_TRANSITIONS=314} [2023-11-17 15:50:51,755 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 166 predicate places. [2023-11-17 15:50:51,756 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 314 transitions, 5641 flow [2023-11-17 15:50:51,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:51,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:51,756 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] [2023-11-17 15:50:51,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 15:50:51,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:51,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:51,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 580811074, now seen corresponding path program 3 times [2023-11-17 15:50:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109818868] [2023-11-17 15:50:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109818868] [2023-11-17 15:50:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109818868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917463345] [2023-11-17 15:50:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:50:52,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:52,441 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:52,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 15:50:52,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:50:52,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:52,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:50:52,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:52,796 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:50:52,797 INFO L378 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 [2023-11-17 15:50:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:52,826 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:52,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917463345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:52,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:52,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-17 15:50:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7599904] [2023-11-17 15:50:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:52,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:50:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:50:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:50:52,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:50:52,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 314 transitions, 5641 flow. Second operand has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:52,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:52,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:50:52,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:53,750 INFO L124 PetriNetUnfolderBase]: 2486/4572 cut-off events. [2023-11-17 15:50:53,750 INFO L125 PetriNetUnfolderBase]: For 70021/70021 co-relation queries the response was YES. [2023-11-17 15:50:53,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34776 conditions, 4572 events. 2486/4572 cut-off events. For 70021/70021 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32078 event pairs, 700 based on Foata normal form. 42/4614 useless extension candidates. Maximal degree in co-relation 34498. Up to 2675 conditions per place. [2023-11-17 15:50:53,839 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 270 selfloop transitions, 93 changer transitions 12/375 dead transitions. [2023-11-17 15:50:53,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 375 transitions, 7067 flow [2023-11-17 15:50:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:50:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:50:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2281 transitions. [2023-11-17 15:50:53,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346867396593674 [2023-11-17 15:50:53,842 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2281 transitions. [2023-11-17 15:50:53,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2281 transitions. [2023-11-17 15:50:53,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:53,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2281 transitions. [2023-11-17 15:50:53,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.08333333333334) internal successors, (2281), 12 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:53,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:53,847 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:53,847 INFO L175 Difference]: Start difference. First operand has 191 places, 314 transitions, 5641 flow. Second operand 12 states and 2281 transitions. [2023-11-17 15:50:53,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 375 transitions, 7067 flow [2023-11-17 15:50:54,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 375 transitions, 6966 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-17 15:50:54,136 INFO L231 Difference]: Finished difference. Result has 198 places, 313 transitions, 5768 flow [2023-11-17 15:50:54,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=5516, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5768, PETRI_PLACES=198, PETRI_TRANSITIONS=313} [2023-11-17 15:50:54,136 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 173 predicate places. [2023-11-17 15:50:54,136 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 313 transitions, 5768 flow [2023-11-17 15:50:54,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:54,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:54,137 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] [2023-11-17 15:50:54,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:54,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:54,341 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:54,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:54,342 INFO L85 PathProgramCache]: Analyzing trace with hash 594875352, now seen corresponding path program 4 times [2023-11-17 15:50:54,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744275686] [2023-11-17 15:50:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:54,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:54,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744275686] [2023-11-17 15:50:54,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744275686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:54,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190508777] [2023-11-17 15:50:54,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:50:54,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:54,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:54,660 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:54,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 15:50:54,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:50:54,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:54,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 15:50:54,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:54,917 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 15:50:54,917 INFO L378 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 24 [2023-11-17 15:50:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:50:54,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:50:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190508777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:50:54,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:50:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-17 15:50:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713564573] [2023-11-17 15:50:54,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:50:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:50:54,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:50:54,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:50:54,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-11-17 15:50:54,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:50:54,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 313 transitions, 5768 flow. Second operand has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:54,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:50:54,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:50:54,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:50:55,924 INFO L124 PetriNetUnfolderBase]: 2531/4704 cut-off events. [2023-11-17 15:50:55,924 INFO L125 PetriNetUnfolderBase]: For 73373/73373 co-relation queries the response was YES. [2023-11-17 15:50:55,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36226 conditions, 4704 events. 2531/4704 cut-off events. For 73373/73373 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33665 event pairs, 674 based on Foata normal form. 9/4713 useless extension candidates. Maximal degree in co-relation 35917. Up to 2675 conditions per place. [2023-11-17 15:50:55,962 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 281 selfloop transitions, 65 changer transitions 30/376 dead transitions. [2023-11-17 15:50:55,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 376 transitions, 7316 flow [2023-11-17 15:50:55,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:50:55,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:50:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1938 transitions. [2023-11-17 15:50:55,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3536496350364963 [2023-11-17 15:50:55,964 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1938 transitions. [2023-11-17 15:50:55,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1938 transitions. [2023-11-17 15:50:55,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:50:55,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1938 transitions. [2023-11-17 15:50:55,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.8) internal successors, (1938), 10 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:55,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:55,969 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:55,969 INFO L175 Difference]: Start difference. First operand has 198 places, 313 transitions, 5768 flow. Second operand 10 states and 1938 transitions. [2023-11-17 15:50:55,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 376 transitions, 7316 flow [2023-11-17 15:50:56,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 376 transitions, 7083 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-17 15:50:56,349 INFO L231 Difference]: Finished difference. Result has 199 places, 304 transitions, 5658 flow [2023-11-17 15:50:56,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5658, PETRI_PLACES=199, PETRI_TRANSITIONS=304} [2023-11-17 15:50:56,349 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 174 predicate places. [2023-11-17 15:50:56,350 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 304 transitions, 5658 flow [2023-11-17 15:50:56,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:50:56,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:50:56,350 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] [2023-11-17 15:50:56,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 15:50:56,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 15:50:56,555 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:50:56,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:50:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash 611525440, now seen corresponding path program 5 times [2023-11-17 15:50:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:50:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070795373] [2023-11-17 15:50:56,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:50:56,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:50:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:50:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:57,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:50:57,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070795373] [2023-11-17 15:50:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070795373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:50:57,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262329828] [2023-11-17 15:50:57,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:50:57,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:50:57,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:50:57,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:50:57,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 15:50:57,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:50:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:50:57,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 15:50:57,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:50:57,325 INFO L378 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 15 treesize of output 1 [2023-11-17 15:50:57,356 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:57,383 INFO L378 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 8 treesize of output 1 [2023-11-17 15:50:57,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:50:57,600 INFO L378 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 [2023-11-17 15:50:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:50:57,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:51:02,309 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,310 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:02,319 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:02,319 INFO L378 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 566 treesize of output 509 [2023-11-17 15:51:02,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,331 INFO L378 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 246 treesize of output 238 [2023-11-17 15:51:02,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,340 INFO L378 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 230 treesize of output 206 [2023-11-17 15:51:02,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,551 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:02,560 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:02,560 INFO L378 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 566 treesize of output 509 [2023-11-17 15:51:02,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,570 INFO L378 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 246 treesize of output 222 [2023-11-17 15:51:02,578 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:02,579 INFO L378 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 214 treesize of output 206 [2023-11-17 15:51:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:02,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262329828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:51:02,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:51:02,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 15:51:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095951193] [2023-11-17 15:51:02,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:51:02,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 15:51:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:02,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 15:51:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1348, Unknown=13, NotChecked=0, Total=1640 [2023-11-17 15:51:02,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 548 [2023-11-17 15:51:02,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 304 transitions, 5658 flow. Second operand has 41 states, 41 states have (on average 155.46341463414635) internal successors, (6374), 41 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:02,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:02,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 548 [2023-11-17 15:51:02,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:07,040 INFO L124 PetriNetUnfolderBase]: 4102/7679 cut-off events. [2023-11-17 15:51:07,040 INFO L125 PetriNetUnfolderBase]: For 118099/118099 co-relation queries the response was YES. [2023-11-17 15:51:07,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57553 conditions, 7679 events. 4102/7679 cut-off events. For 118099/118099 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 59942 event pairs, 842 based on Foata normal form. 76/7755 useless extension candidates. Maximal degree in co-relation 57083. Up to 2339 conditions per place. [2023-11-17 15:51:07,107 INFO L140 encePairwiseOnDemand]: 532/548 looper letters, 472 selfloop transitions, 291 changer transitions 52/815 dead transitions. [2023-11-17 15:51:07,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 815 transitions, 14427 flow [2023-11-17 15:51:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 15:51:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 15:51:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 8032 transitions. [2023-11-17 15:51:07,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2931386861313869 [2023-11-17 15:51:07,123 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 8032 transitions. [2023-11-17 15:51:07,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 8032 transitions. [2023-11-17 15:51:07,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:07,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 8032 transitions. [2023-11-17 15:51:07,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 160.64) internal successors, (8032), 50 states have internal predecessors, (8032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:07,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 548.0) internal successors, (27948), 51 states have internal predecessors, (27948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:07,154 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 548.0) internal successors, (27948), 51 states have internal predecessors, (27948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:07,154 INFO L175 Difference]: Start difference. First operand has 199 places, 304 transitions, 5658 flow. Second operand 50 states and 8032 transitions. [2023-11-17 15:51:07,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 815 transitions, 14427 flow [2023-11-17 15:51:07,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 815 transitions, 14237 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-11-17 15:51:07,861 INFO L231 Difference]: Finished difference. Result has 261 places, 487 transitions, 10273 flow [2023-11-17 15:51:07,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=10273, PETRI_PLACES=261, PETRI_TRANSITIONS=487} [2023-11-17 15:51:07,862 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2023-11-17 15:51:07,862 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 487 transitions, 10273 flow [2023-11-17 15:51:07,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 155.46341463414635) internal successors, (6374), 41 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:07,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:07,863 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] [2023-11-17 15:51:07,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:08,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 15:51:08,067 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:08,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 409110010, now seen corresponding path program 6 times [2023-11-17 15:51:08,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:08,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300287900] [2023-11-17 15:51:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:08,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300287900] [2023-11-17 15:51:08,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300287900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:08,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232752867] [2023-11-17 15:51:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:51:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:08,541 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:08,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 15:51:08,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 15:51:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:08,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:51:08,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:08,906 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:08,907 INFO L378 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 [2023-11-17 15:51:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:08,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232752867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:08,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2023-11-17 15:51:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779287925] [2023-11-17 15:51:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:51:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:51:08,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:51:08,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:51:08,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 487 transitions, 10273 flow. Second operand has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:08,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:08,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:51:08,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:10,737 INFO L124 PetriNetUnfolderBase]: 4046/7419 cut-off events. [2023-11-17 15:51:10,737 INFO L125 PetriNetUnfolderBase]: For 130961/130961 co-relation queries the response was YES. [2023-11-17 15:51:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59429 conditions, 7419 events. 4046/7419 cut-off events. For 130961/130961 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 56072 event pairs, 1215 based on Foata normal form. 8/7427 useless extension candidates. Maximal degree in co-relation 59007. Up to 4839 conditions per place. [2023-11-17 15:51:10,792 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 389 selfloop transitions, 120 changer transitions 24/533 dead transitions. [2023-11-17 15:51:10,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 533 transitions, 11748 flow [2023-11-17 15:51:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:51:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:51:10,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2463 transitions. [2023-11-17 15:51:10,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3457327344188658 [2023-11-17 15:51:10,796 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2463 transitions. [2023-11-17 15:51:10,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2463 transitions. [2023-11-17 15:51:10,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:10,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2463 transitions. [2023-11-17 15:51:10,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 189.46153846153845) internal successors, (2463), 13 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:10,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:10,801 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:10,801 INFO L175 Difference]: Start difference. First operand has 261 places, 487 transitions, 10273 flow. Second operand 13 states and 2463 transitions. [2023-11-17 15:51:10,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 533 transitions, 11748 flow [2023-11-17 15:51:11,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 533 transitions, 10989 flow, removed 152 selfloop flow, removed 22 redundant places. [2023-11-17 15:51:11,628 INFO L231 Difference]: Finished difference. Result has 245 places, 473 transitions, 9450 flow [2023-11-17 15:51:11,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9539, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9450, PETRI_PLACES=245, PETRI_TRANSITIONS=473} [2023-11-17 15:51:11,629 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 220 predicate places. [2023-11-17 15:51:11,629 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 473 transitions, 9450 flow [2023-11-17 15:51:11,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:11,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:11,629 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] [2023-11-17 15:51:11,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 15:51:11,834 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:11,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash 745913498, now seen corresponding path program 7 times [2023-11-17 15:51:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172552142] [2023-11-17 15:51:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:12,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172552142] [2023-11-17 15:51:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172552142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970918057] [2023-11-17 15:51:12,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:51:12,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:12,227 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:12,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 15:51:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:12,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 15:51:12,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:12,469 INFO L378 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 15 treesize of output 1 [2023-11-17 15:51:12,502 INFO L378 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 8 treesize of output 1 [2023-11-17 15:51:12,536 INFO L378 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 8 treesize of output 1 [2023-11-17 15:51:12,772 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:12,772 INFO L378 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 [2023-11-17 15:51:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:12,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:51:15,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,596 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:15,606 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:15,606 INFO L378 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 566 treesize of output 509 [2023-11-17 15:51:15,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,619 INFO L378 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 246 treesize of output 238 [2023-11-17 15:51:15,629 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,629 INFO L378 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 230 treesize of output 206 [2023-11-17 15:51:15,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,770 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:15,778 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:15,778 INFO L378 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 278 treesize of output 253 [2023-11-17 15:51:15,786 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,786 INFO L378 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 246 treesize of output 222 [2023-11-17 15:51:15,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:15,795 INFO L378 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 214 treesize of output 206 [2023-11-17 15:51:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:16,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970918057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:51:16,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:51:16,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2023-11-17 15:51:16,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913541327] [2023-11-17 15:51:16,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:51:16,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 15:51:16,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:16,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 15:51:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1162, Unknown=12, NotChecked=0, Total=1406 [2023-11-17 15:51:16,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 548 [2023-11-17 15:51:16,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 473 transitions, 9450 flow. Second operand has 38 states, 38 states have (on average 155.57894736842104) internal successors, (5912), 38 states have internal predecessors, (5912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:16,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:16,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 548 [2023-11-17 15:51:16,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:20,383 INFO L124 PetriNetUnfolderBase]: 4138/7691 cut-off events. [2023-11-17 15:51:20,384 INFO L125 PetriNetUnfolderBase]: For 125233/125233 co-relation queries the response was YES. [2023-11-17 15:51:20,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59657 conditions, 7691 events. 4138/7691 cut-off events. For 125233/125233 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 59473 event pairs, 482 based on Foata normal form. 108/7799 useless extension candidates. Maximal degree in co-relation 59251. Up to 2359 conditions per place. [2023-11-17 15:51:20,441 INFO L140 encePairwiseOnDemand]: 532/548 looper letters, 488 selfloop transitions, 268 changer transitions 47/803 dead transitions. [2023-11-17 15:51:20,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 803 transitions, 14817 flow [2023-11-17 15:51:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 15:51:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 15:51:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8801 transitions. [2023-11-17 15:51:20,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2920039814200398 [2023-11-17 15:51:20,448 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8801 transitions. [2023-11-17 15:51:20,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8801 transitions. [2023-11-17 15:51:20,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:20,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8801 transitions. [2023-11-17 15:51:20,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 160.01818181818183) internal successors, (8801), 55 states have internal predecessors, (8801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:20,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 548.0) internal successors, (30688), 56 states have internal predecessors, (30688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:20,468 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 548.0) internal successors, (30688), 56 states have internal predecessors, (30688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:20,468 INFO L175 Difference]: Start difference. First operand has 245 places, 473 transitions, 9450 flow. Second operand 55 states and 8801 transitions. [2023-11-17 15:51:20,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 803 transitions, 14817 flow [2023-11-17 15:51:21,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 803 transitions, 14506 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-11-17 15:51:21,313 INFO L231 Difference]: Finished difference. Result has 302 places, 522 transitions, 10895 flow [2023-11-17 15:51:21,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=10895, PETRI_PLACES=302, PETRI_TRANSITIONS=522} [2023-11-17 15:51:21,313 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 277 predicate places. [2023-11-17 15:51:21,313 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 522 transitions, 10895 flow [2023-11-17 15:51:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 155.57894736842104) internal successors, (5912), 38 states have internal predecessors, (5912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:21,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:21,314 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] [2023-11-17 15:51:21,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:21,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:21,518 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:21,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -586509952, now seen corresponding path program 8 times [2023-11-17 15:51:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105623088] [2023-11-17 15:51:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105623088] [2023-11-17 15:51:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105623088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387244515] [2023-11-17 15:51:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:51:22,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:22,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:22,016 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:22,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 15:51:22,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:51:22,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:22,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:51:22,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:22,335 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:22,336 INFO L378 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 [2023-11-17 15:51:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:22,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387244515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:22,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:22,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2023-11-17 15:51:22,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451741490] [2023-11-17 15:51:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:51:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:51:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-11-17 15:51:22,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:51:22,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 522 transitions, 10895 flow. Second operand has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:22,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:22,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:51:22,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:24,128 INFO L124 PetriNetUnfolderBase]: 4030/7427 cut-off events. [2023-11-17 15:51:24,128 INFO L125 PetriNetUnfolderBase]: For 183367/183367 co-relation queries the response was YES. [2023-11-17 15:51:24,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64257 conditions, 7427 events. 4030/7427 cut-off events. For 183367/183367 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 56482 event pairs, 1241 based on Foata normal form. 8/7435 useless extension candidates. Maximal degree in co-relation 63827. Up to 4871 conditions per place. [2023-11-17 15:51:24,322 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 426 selfloop transitions, 109 changer transitions 26/561 dead transitions. [2023-11-17 15:51:24,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 561 transitions, 12489 flow [2023-11-17 15:51:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:51:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:51:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1941 transitions. [2023-11-17 15:51:24,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541970802919708 [2023-11-17 15:51:24,324 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1941 transitions. [2023-11-17 15:51:24,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1941 transitions. [2023-11-17 15:51:24,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:24,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1941 transitions. [2023-11-17 15:51:24,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:24,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:24,344 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:24,344 INFO L175 Difference]: Start difference. First operand has 302 places, 522 transitions, 10895 flow. Second operand 10 states and 1941 transitions. [2023-11-17 15:51:24,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 561 transitions, 12489 flow [2023-11-17 15:51:25,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 561 transitions, 12143 flow, removed 114 selfloop flow, removed 17 redundant places. [2023-11-17 15:51:25,289 INFO L231 Difference]: Finished difference. Result has 288 places, 514 transitions, 10691 flow [2023-11-17 15:51:25,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=10581, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10691, PETRI_PLACES=288, PETRI_TRANSITIONS=514} [2023-11-17 15:51:25,289 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 263 predicate places. [2023-11-17 15:51:25,289 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 514 transitions, 10691 flow [2023-11-17 15:51:25,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:25,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:25,290 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] [2023-11-17 15:51:25,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:25,495 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:25,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1425263896, now seen corresponding path program 9 times [2023-11-17 15:51:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:25,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029521355] [2023-11-17 15:51:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:25,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:25,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029521355] [2023-11-17 15:51:25,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029521355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:25,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559179648] [2023-11-17 15:51:25,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:51:25,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:25,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:25,982 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:26,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 15:51:26,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:51:26,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:26,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:51:26,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:26,474 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:26,474 INFO L378 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 [2023-11-17 15:51:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:26,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:26,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559179648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:26,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:26,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 20 [2023-11-17 15:51:26,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425522136] [2023-11-17 15:51:26,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:26,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:51:26,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:26,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:51:26,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:51:26,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:51:26,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 514 transitions, 10691 flow. Second operand has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:26,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:26,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:51:26,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:28,297 INFO L124 PetriNetUnfolderBase]: 3978/7271 cut-off events. [2023-11-17 15:51:28,298 INFO L125 PetriNetUnfolderBase]: For 181085/181085 co-relation queries the response was YES. [2023-11-17 15:51:28,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62508 conditions, 7271 events. 3978/7271 cut-off events. For 181085/181085 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 54574 event pairs, 1245 based on Foata normal form. 8/7279 useless extension candidates. Maximal degree in co-relation 62416. Up to 4871 conditions per place. [2023-11-17 15:51:28,358 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 402 selfloop transitions, 113 changer transitions 24/539 dead transitions. [2023-11-17 15:51:28,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 539 transitions, 11932 flow [2023-11-17 15:51:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:51:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:51:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1935 transitions. [2023-11-17 15:51:28,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3531021897810219 [2023-11-17 15:51:28,360 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1935 transitions. [2023-11-17 15:51:28,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1935 transitions. [2023-11-17 15:51:28,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:28,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1935 transitions. [2023-11-17 15:51:28,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.5) internal successors, (1935), 10 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:28,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:28,364 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:28,364 INFO L175 Difference]: Start difference. First operand has 288 places, 514 transitions, 10691 flow. Second operand 10 states and 1935 transitions. [2023-11-17 15:51:28,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 539 transitions, 11932 flow [2023-11-17 15:51:29,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 539 transitions, 11560 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-11-17 15:51:29,313 INFO L231 Difference]: Finished difference. Result has 283 places, 496 transitions, 10165 flow [2023-11-17 15:51:29,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=10323, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10165, PETRI_PLACES=283, PETRI_TRANSITIONS=496} [2023-11-17 15:51:29,314 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 258 predicate places. [2023-11-17 15:51:29,314 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 496 transitions, 10165 flow [2023-11-17 15:51:29,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:29,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:29,314 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] [2023-11-17 15:51:29,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:29,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:29,518 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:29,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:29,519 INFO L85 PathProgramCache]: Analyzing trace with hash 883488738, now seen corresponding path program 10 times [2023-11-17 15:51:29,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:29,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052088562] [2023-11-17 15:51:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:29,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052088562] [2023-11-17 15:51:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052088562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:30,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347277794] [2023-11-17 15:51:30,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:51:30,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:30,146 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:30,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 15:51:30,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:51:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:30,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 15:51:30,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:30,474 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2023-11-17 15:51:30,474 INFO L378 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 24 [2023-11-17 15:51:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:30,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:30,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347277794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:30,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:30,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13] total 22 [2023-11-17 15:51:30,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471626883] [2023-11-17 15:51:30,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:30,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:51:30,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:30,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:51:30,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:51:30,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:51:30,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 496 transitions, 10165 flow. Second operand has 11 states, 11 states have (on average 184.8181818181818) internal successors, (2033), 11 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:30,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:30,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:51:30,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:32,093 INFO L124 PetriNetUnfolderBase]: 3938/7123 cut-off events. [2023-11-17 15:51:32,093 INFO L125 PetriNetUnfolderBase]: For 175789/175789 co-relation queries the response was YES. [2023-11-17 15:51:32,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61058 conditions, 7123 events. 3938/7123 cut-off events. For 175789/175789 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 52387 event pairs, 1187 based on Foata normal form. 4/7127 useless extension candidates. Maximal degree in co-relation 60969. Up to 4871 conditions per place. [2023-11-17 15:51:32,155 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 371 selfloop transitions, 150 changer transitions 18/539 dead transitions. [2023-11-17 15:51:32,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 539 transitions, 11761 flow [2023-11-17 15:51:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:51:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:51:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2273 transitions. [2023-11-17 15:51:32,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456508515815085 [2023-11-17 15:51:32,157 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2273 transitions. [2023-11-17 15:51:32,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2273 transitions. [2023-11-17 15:51:32,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:32,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2273 transitions. [2023-11-17 15:51:32,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.41666666666666) internal successors, (2273), 12 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:32,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:32,162 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:32,162 INFO L175 Difference]: Start difference. First operand has 283 places, 496 transitions, 10165 flow. Second operand 12 states and 2273 transitions. [2023-11-17 15:51:32,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 539 transitions, 11761 flow [2023-11-17 15:51:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 539 transitions, 11494 flow, removed 10 selfloop flow, removed 11 redundant places. [2023-11-17 15:51:33,175 INFO L231 Difference]: Finished difference. Result has 277 places, 487 transitions, 10009 flow [2023-11-17 15:51:33,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9902, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10009, PETRI_PLACES=277, PETRI_TRANSITIONS=487} [2023-11-17 15:51:33,175 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 252 predicate places. [2023-11-17 15:51:33,176 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 487 transitions, 10009 flow [2023-11-17 15:51:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 184.8181818181818) internal successors, (2033), 11 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:33,176 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] [2023-11-17 15:51:33,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:33,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-17 15:51:33,380 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:33,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1276504926, now seen corresponding path program 11 times [2023-11-17 15:51:33,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:33,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393885743] [2023-11-17 15:51:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:33,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:33,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393885743] [2023-11-17 15:51:33,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393885743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:33,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771449983] [2023-11-17 15:51:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:51:33,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:33,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:33,672 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:33,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 15:51:33,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:51:33,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:33,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 15:51:33,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:33,885 INFO L378 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 15 treesize of output 1 [2023-11-17 15:51:33,919 INFO L378 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 8 treesize of output 1 [2023-11-17 15:51:33,948 INFO L378 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 8 treesize of output 1 [2023-11-17 15:51:34,130 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:34,131 INFO L378 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 [2023-11-17 15:51:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:34,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:51:34,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,652 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:34,663 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:34,663 INFO L378 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 1142 treesize of output 1021 [2023-11-17 15:51:34,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,674 INFO L378 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 246 treesize of output 238 [2023-11-17 15:51:34,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,682 INFO L378 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 230 treesize of output 206 [2023-11-17 15:51:34,916 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,917 INFO L378 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 47 treesize of output 36 [2023-11-17 15:51:34,926 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:34,926 INFO L378 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 1142 treesize of output 1021 [2023-11-17 15:51:34,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,938 INFO L378 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 246 treesize of output 238 [2023-11-17 15:51:34,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:51:34,947 INFO L378 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 230 treesize of output 206 [2023-11-17 15:51:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771449983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:51:35,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:51:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 13] total 32 [2023-11-17 15:51:35,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79603594] [2023-11-17 15:51:35,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:51:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 15:51:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 15:51:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=971, Unknown=10, NotChecked=0, Total=1122 [2023-11-17 15:51:35,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 548 [2023-11-17 15:51:35,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 487 transitions, 10009 flow. Second operand has 34 states, 34 states have (on average 155.55882352941177) internal successors, (5289), 34 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:35,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:35,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 548 [2023-11-17 15:51:35,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:37,759 INFO L124 PetriNetUnfolderBase]: 4020/7205 cut-off events. [2023-11-17 15:51:37,760 INFO L125 PetriNetUnfolderBase]: For 173330/173330 co-relation queries the response was YES. [2023-11-17 15:51:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62601 conditions, 7205 events. 4020/7205 cut-off events. For 173330/173330 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 52542 event pairs, 550 based on Foata normal form. 4/7209 useless extension candidates. Maximal degree in co-relation 62514. Up to 2644 conditions per place. [2023-11-17 15:51:37,818 INFO L140 encePairwiseOnDemand]: 533/548 looper letters, 333 selfloop transitions, 239 changer transitions 21/593 dead transitions. [2023-11-17 15:51:37,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 593 transitions, 12714 flow [2023-11-17 15:51:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 15:51:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 15:51:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3017 transitions. [2023-11-17 15:51:37,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28976181329235495 [2023-11-17 15:51:37,820 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3017 transitions. [2023-11-17 15:51:37,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3017 transitions. [2023-11-17 15:51:37,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:37,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3017 transitions. [2023-11-17 15:51:37,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 158.78947368421052) internal successors, (3017), 19 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:37,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 548.0) internal successors, (10960), 20 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:37,826 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 548.0) internal successors, (10960), 20 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:37,826 INFO L175 Difference]: Start difference. First operand has 277 places, 487 transitions, 10009 flow. Second operand 19 states and 3017 transitions. [2023-11-17 15:51:37,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 593 transitions, 12714 flow [2023-11-17 15:51:38,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 593 transitions, 12218 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-11-17 15:51:38,787 INFO L231 Difference]: Finished difference. Result has 281 places, 495 transitions, 10401 flow [2023-11-17 15:51:38,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9594, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10401, PETRI_PLACES=281, PETRI_TRANSITIONS=495} [2023-11-17 15:51:38,787 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2023-11-17 15:51:38,787 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 495 transitions, 10401 flow [2023-11-17 15:51:38,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 155.55882352941177) internal successors, (5289), 34 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:38,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:38,788 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] [2023-11-17 15:51:38,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:38,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:38,993 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:38,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:38,993 INFO L85 PathProgramCache]: Analyzing trace with hash -43900674, now seen corresponding path program 12 times [2023-11-17 15:51:38,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:38,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829464987] [2023-11-17 15:51:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829464987] [2023-11-17 15:51:39,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829464987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:39,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094127928] [2023-11-17 15:51:39,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:51:39,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:39,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:39,427 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:39,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 15:51:39,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 15:51:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:39,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-17 15:51:39,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:39,781 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:39,781 INFO L378 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 [2023-11-17 15:51:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:39,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:39,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094127928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:39,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:39,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 22 [2023-11-17 15:51:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689863585] [2023-11-17 15:51:39,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:51:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:51:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 15:51:39,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:51:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 495 transitions, 10401 flow. Second operand has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:39,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:51:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:41,465 INFO L124 PetriNetUnfolderBase]: 3964/7117 cut-off events. [2023-11-17 15:51:41,465 INFO L125 PetriNetUnfolderBase]: For 197740/197740 co-relation queries the response was YES. [2023-11-17 15:51:41,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63793 conditions, 7117 events. 3964/7117 cut-off events. For 197740/197740 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 51855 event pairs, 966 based on Foata normal form. 36/7153 useless extension candidates. Maximal degree in co-relation 63700. Up to 5108 conditions per place. [2023-11-17 15:51:41,651 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 302 selfloop transitions, 224 changer transitions 10/536 dead transitions. [2023-11-17 15:51:41,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 536 transitions, 11837 flow [2023-11-17 15:51:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:51:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:51:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2265 transitions. [2023-11-17 15:51:41,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34443430656934304 [2023-11-17 15:51:41,653 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2265 transitions. [2023-11-17 15:51:41,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2265 transitions. [2023-11-17 15:51:41,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:41,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2265 transitions. [2023-11-17 15:51:41,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 188.75) internal successors, (2265), 12 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:41,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:41,658 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:41,658 INFO L175 Difference]: Start difference. First operand has 281 places, 495 transitions, 10401 flow. Second operand 12 states and 2265 transitions. [2023-11-17 15:51:41,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 536 transitions, 11837 flow [2023-11-17 15:51:42,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 536 transitions, 11357 flow, removed 44 selfloop flow, removed 15 redundant places. [2023-11-17 15:51:42,847 INFO L231 Difference]: Finished difference. Result has 273 places, 495 transitions, 10428 flow [2023-11-17 15:51:42,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9916, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10428, PETRI_PLACES=273, PETRI_TRANSITIONS=495} [2023-11-17 15:51:42,847 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 248 predicate places. [2023-11-17 15:51:42,847 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 495 transitions, 10428 flow [2023-11-17 15:51:42,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:42,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:42,848 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] [2023-11-17 15:51:42,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 15:51:43,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:43,054 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:43,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1092856218, now seen corresponding path program 13 times [2023-11-17 15:51:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:43,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532892304] [2023-11-17 15:51:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:43,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532892304] [2023-11-17 15:51:43,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532892304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:43,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804199651] [2023-11-17 15:51:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:51:43,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:43,381 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:43,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 15:51:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:43,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 15:51:43,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:43,741 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:43,741 INFO L378 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 [2023-11-17 15:51:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:43,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:51:44,157 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:44,157 INFO L378 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 19 treesize of output 11 [2023-11-17 15:51:44,193 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:51:44,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 66 [2023-11-17 15:51:44,223 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:51:44,223 INFO L378 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 19 treesize of output 11 [2023-11-17 15:51:44,230 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2023-11-17 15:51:44,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 1 [2023-11-17 15:51:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804199651] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:44,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:51:44,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 12] total 29 [2023-11-17 15:51:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146887017] [2023-11-17 15:51:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 15:51:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 15:51:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-11-17 15:51:44,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 548 [2023-11-17 15:51:44,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 495 transitions, 10428 flow. Second operand has 13 states, 13 states have (on average 168.53846153846155) internal successors, (2191), 13 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:44,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:44,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 548 [2023-11-17 15:51:44,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:46,044 INFO L124 PetriNetUnfolderBase]: 3952/7097 cut-off events. [2023-11-17 15:51:46,044 INFO L125 PetriNetUnfolderBase]: For 195154/195154 co-relation queries the response was YES. [2023-11-17 15:51:46,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63463 conditions, 7097 events. 3952/7097 cut-off events. For 195154/195154 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 51733 event pairs, 960 based on Foata normal form. 4/7101 useless extension candidates. Maximal degree in co-relation 63375. Up to 5115 conditions per place. [2023-11-17 15:51:46,104 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 302 selfloop transitions, 206 changer transitions 23/531 dead transitions. [2023-11-17 15:51:46,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 531 transitions, 11773 flow [2023-11-17 15:51:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:51:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:51:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1901 transitions. [2023-11-17 15:51:46,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31536164565361646 [2023-11-17 15:51:46,107 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1901 transitions. [2023-11-17 15:51:46,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1901 transitions. [2023-11-17 15:51:46,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:46,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1901 transitions. [2023-11-17 15:51:46,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 172.8181818181818) internal successors, (1901), 11 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:46,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:46,111 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:46,111 INFO L175 Difference]: Start difference. First operand has 273 places, 495 transitions, 10428 flow. Second operand 11 states and 1901 transitions. [2023-11-17 15:51:46,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 531 transitions, 11773 flow [2023-11-17 15:51:47,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 531 transitions, 11314 flow, removed 17 selfloop flow, removed 8 redundant places. [2023-11-17 15:51:47,396 INFO L231 Difference]: Finished difference. Result has 275 places, 479 transitions, 10103 flow [2023-11-17 15:51:47,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9983, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10103, PETRI_PLACES=275, PETRI_TRANSITIONS=479} [2023-11-17 15:51:47,396 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 250 predicate places. [2023-11-17 15:51:47,396 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 479 transitions, 10103 flow [2023-11-17 15:51:47,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.53846153846155) internal successors, (2191), 13 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:47,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:47,397 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] [2023-11-17 15:51:47,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 15:51:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-17 15:51:47,602 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:47,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash -246316104, now seen corresponding path program 14 times [2023-11-17 15:51:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:47,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324083972] [2023-11-17 15:51:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324083972] [2023-11-17 15:51:47,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324083972] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:47,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961171874] [2023-11-17 15:51:47,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:51:47,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:47,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:47,986 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:48,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 15:51:48,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:51:48,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:48,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:51:48,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:48,301 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:48,301 INFO L378 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 [2023-11-17 15:51:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:48,333 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961171874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:48,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-11-17 15:51:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599838504] [2023-11-17 15:51:48,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:51:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:51:48,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-11-17 15:51:48,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:51:48,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 479 transitions, 10103 flow. Second operand has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:48,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:48,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:51:48,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:49,976 INFO L124 PetriNetUnfolderBase]: 3911/6990 cut-off events. [2023-11-17 15:51:49,976 INFO L125 PetriNetUnfolderBase]: For 191766/191766 co-relation queries the response was YES. [2023-11-17 15:51:50,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62597 conditions, 6990 events. 3911/6990 cut-off events. For 191766/191766 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50500 event pairs, 972 based on Foata normal form. 4/6994 useless extension candidates. Maximal degree in co-relation 62509. Up to 5108 conditions per place. [2023-11-17 15:51:50,047 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 288 selfloop transitions, 206 changer transitions 18/512 dead transitions. [2023-11-17 15:51:50,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 512 transitions, 11369 flow [2023-11-17 15:51:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:51:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:51:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2071 transitions. [2023-11-17 15:51:50,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435633709356337 [2023-11-17 15:51:50,050 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2071 transitions. [2023-11-17 15:51:50,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2071 transitions. [2023-11-17 15:51:50,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:50,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2071 transitions. [2023-11-17 15:51:50,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 188.27272727272728) internal successors, (2071), 11 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:50,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:50,054 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:50,054 INFO L175 Difference]: Start difference. First operand has 275 places, 479 transitions, 10103 flow. Second operand 11 states and 2071 transitions. [2023-11-17 15:51:50,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 512 transitions, 11369 flow [2023-11-17 15:51:51,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 512 transitions, 10936 flow, removed 6 selfloop flow, removed 10 redundant places. [2023-11-17 15:51:51,442 INFO L231 Difference]: Finished difference. Result has 272 places, 471 transitions, 9926 flow [2023-11-17 15:51:51,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9673, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9926, PETRI_PLACES=272, PETRI_TRANSITIONS=471} [2023-11-17 15:51:51,443 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 247 predicate places. [2023-11-17 15:51:51,443 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 471 transitions, 9926 flow [2023-11-17 15:51:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 184.66666666666666) internal successors, (2216), 12 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:51,443 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] [2023-11-17 15:51:51,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 15:51:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 15:51:51,648 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:51,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1446108482, now seen corresponding path program 15 times [2023-11-17 15:51:51,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:51,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587093031] [2023-11-17 15:51:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587093031] [2023-11-17 15:51:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587093031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618274425] [2023-11-17 15:51:52,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:51:52,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:52,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:52,054 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:52,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 15:51:52,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:51:52,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:52,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:51:52,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:52,351 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:52,351 INFO L378 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 [2023-11-17 15:51:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:52,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618274425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:52,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:52,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2023-11-17 15:51:52,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587782765] [2023-11-17 15:51:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:52,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:51:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:51:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-17 15:51:52,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:51:52,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 471 transitions, 9926 flow. Second operand has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:52,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:51:52,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:54,104 INFO L124 PetriNetUnfolderBase]: 4030/7231 cut-off events. [2023-11-17 15:51:54,104 INFO L125 PetriNetUnfolderBase]: For 204680/204680 co-relation queries the response was YES. [2023-11-17 15:51:54,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64849 conditions, 7231 events. 4030/7231 cut-off events. For 204680/204680 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 52836 event pairs, 1167 based on Foata normal form. 4/7235 useless extension candidates. Maximal degree in co-relation 64762. Up to 4865 conditions per place. [2023-11-17 15:51:54,158 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 375 selfloop transitions, 150 changer transitions 6/531 dead transitions. [2023-11-17 15:51:54,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 531 transitions, 11920 flow [2023-11-17 15:51:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:51:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:51:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1941 transitions. [2023-11-17 15:51:54,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541970802919708 [2023-11-17 15:51:54,160 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1941 transitions. [2023-11-17 15:51:54,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1941 transitions. [2023-11-17 15:51:54,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:54,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1941 transitions. [2023-11-17 15:51:54,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:54,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:54,164 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:54,164 INFO L175 Difference]: Start difference. First operand has 272 places, 471 transitions, 9926 flow. Second operand 10 states and 1941 transitions. [2023-11-17 15:51:54,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 531 transitions, 11920 flow [2023-11-17 15:51:55,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 531 transitions, 11448 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-11-17 15:51:55,377 INFO L231 Difference]: Finished difference. Result has 266 places, 483 transitions, 10133 flow [2023-11-17 15:51:55,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9484, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10133, PETRI_PLACES=266, PETRI_TRANSITIONS=483} [2023-11-17 15:51:55,378 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 241 predicate places. [2023-11-17 15:51:55,378 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 483 transitions, 10133 flow [2023-11-17 15:51:55,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:55,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:55,379 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] [2023-11-17 15:51:55,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 15:51:55,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 15:51:55,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:55,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:55,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2128923752, now seen corresponding path program 16 times [2023-11-17 15:51:55,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:55,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392704011] [2023-11-17 15:51:55,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:55,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:55,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392704011] [2023-11-17 15:51:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392704011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873398806] [2023-11-17 15:51:55,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:51:55,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:55,956 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:55,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 15:51:56,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:51:56,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:51:56,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:51:56,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:51:56,247 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:51:56,247 INFO L378 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 [2023-11-17 15:51:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:51:56,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:51:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873398806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:51:56,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:51:56,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2023-11-17 15:51:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289920863] [2023-11-17 15:51:56,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:51:56,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:51:56,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:51:56,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:51:56,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-17 15:51:56,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 548 [2023-11-17 15:51:56,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 483 transitions, 10133 flow. Second operand has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:56,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:51:56,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 548 [2023-11-17 15:51:56,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:51:58,097 INFO L124 PetriNetUnfolderBase]: 4014/7215 cut-off events. [2023-11-17 15:51:58,097 INFO L125 PetriNetUnfolderBase]: For 198191/198191 co-relation queries the response was YES. [2023-11-17 15:51:58,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64191 conditions, 7215 events. 4014/7215 cut-off events. For 198191/198191 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52775 event pairs, 1207 based on Foata normal form. 4/7219 useless extension candidates. Maximal degree in co-relation 64104. Up to 4865 conditions per place. [2023-11-17 15:51:58,156 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 366 selfloop transitions, 155 changer transitions 6/527 dead transitions. [2023-11-17 15:51:58,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 527 transitions, 11853 flow [2023-11-17 15:51:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:51:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:51:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1937 transitions. [2023-11-17 15:51:58,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35346715328467154 [2023-11-17 15:51:58,158 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1937 transitions. [2023-11-17 15:51:58,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1937 transitions. [2023-11-17 15:51:58,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:51:58,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1937 transitions. [2023-11-17 15:51:58,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.7) internal successors, (1937), 10 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:58,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:58,162 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:58,162 INFO L175 Difference]: Start difference. First operand has 266 places, 483 transitions, 10133 flow. Second operand 10 states and 1937 transitions. [2023-11-17 15:51:58,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 527 transitions, 11853 flow [2023-11-17 15:51:59,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 527 transitions, 11640 flow, removed 20 selfloop flow, removed 6 redundant places. [2023-11-17 15:51:59,377 INFO L231 Difference]: Finished difference. Result has 272 places, 494 transitions, 10607 flow [2023-11-17 15:51:59,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=9924, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10607, PETRI_PLACES=272, PETRI_TRANSITIONS=494} [2023-11-17 15:51:59,378 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 247 predicate places. [2023-11-17 15:51:59,378 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 494 transitions, 10607 flow [2023-11-17 15:51:59,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 188.8181818181818) internal successors, (2077), 11 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:51:59,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:51:59,378 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] [2023-11-17 15:51:59,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 15:51:59,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 15:51:59,583 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:51:59,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:51:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1969422944, now seen corresponding path program 17 times [2023-11-17 15:51:59,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:51:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670244369] [2023-11-17 15:51:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:51:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:51:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:51:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:51:59,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:51:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670244369] [2023-11-17 15:51:59,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670244369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:51:59,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916290970] [2023-11-17 15:51:59,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:51:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:51:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:51:59,941 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:51:59,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 15:52:00,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:52:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:00,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 15:52:00,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:00,199 INFO L378 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 15 treesize of output 1 [2023-11-17 15:52:00,226 INFO L378 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 8 treesize of output 1 [2023-11-17 15:52:00,299 INFO L378 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 8 treesize of output 1 [2023-11-17 15:52:00,371 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:52:00,371 INFO L378 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 [2023-11-17 15:52:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:00,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:52:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:01,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916290970] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:01,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:52:01,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 11] total 28 [2023-11-17 15:52:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105954798] [2023-11-17 15:52:01,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:52:01,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:52:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:01,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:52:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=711, Unknown=14, NotChecked=0, Total=870 [2023-11-17 15:52:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 548 [2023-11-17 15:52:01,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 494 transitions, 10607 flow. Second operand has 12 states, 12 states have (on average 167.66666666666666) internal successors, (2012), 12 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:01,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:01,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 548 [2023-11-17 15:52:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:01,567 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse27 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)) (.cse28 (select |c_#memory_int| c_~a2~0.base))) (let ((.cse1 (select .cse28 c_~a2~0.offset)) (.cse8 (+ .cse27 c_~a2~0.offset))) (let ((.cse4 (select .cse28 .cse8)) (.cse3 (+ .cse27 c_~a1~0.offset)) (.cse12 (+ .cse1 2147483648))) (and (forall ((~a1~0.base Int)) (let ((.cse2 (select |c_#memory_int| ~a1~0.base))) (let ((.cse0 (select .cse2 c_~a1~0.offset))) (or (= .cse0 .cse1) (< (select .cse2 .cse3) .cse4) (< .cse1 .cse0) (< (+ .cse0 2147483647) .cse1))))) (forall ((v_ArrVal_1244 (Array Int Int)) (~a1~0.base Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1244))) (let ((.cse9 (select .cse10 ~a1~0.base)) (.cse7 (select .cse10 c_~a2~0.base))) (let ((.cse5 (select .cse7 c_~a2~0.offset)) (.cse6 (select .cse9 c_~a1~0.offset))) (or (= .cse5 .cse6) (< (+ 2147483647 .cse6) .cse5) (not (= (select .cse7 .cse8) (select .cse9 .cse3))) (< (+ .cse5 2147483648) .cse6)))))) (let ((.cse11 (select (select |c_#memory_int| c_~a1~0.base) c_~a1~0.offset))) (or (< (+ 2147483647 .cse11) .cse1) (< .cse12 .cse11) (and (<= (+ .cse4 1) |c_thread1Thread1of1ForFork0_#t~mem3#1|) (<= (+ .cse1 1) .cse11)) (and (<= (+ .cse11 1) .cse1) (<= (+ |c_thread1Thread1of1ForFork0_#t~mem3#1| 1) .cse4)) (= .cse1 .cse11))) (forall ((v_ArrVal_1244 (Array Int Int)) (~a1~0.base Int)) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1244))) (let ((.cse14 (select .cse17 ~a1~0.base)) (.cse13 (select .cse17 c_~a2~0.base))) (let ((.cse15 (select .cse13 c_~a2~0.offset)) (.cse16 (select .cse14 c_~a1~0.offset))) (or (< (select .cse13 .cse8) (select .cse14 .cse3)) (= .cse15 .cse16) (< .cse16 .cse15) (< (+ .cse15 2147483648) .cse16)))))) (forall ((~a1~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~a1~0.base))) (let ((.cse19 (select .cse18 c_~a1~0.offset))) (or (not (= (select .cse18 .cse3) .cse4)) (= .cse19 .cse1) (< .cse12 .cse19) (< (+ .cse19 2147483647) .cse1))))) (forall ((v_ArrVal_1244 (Array Int Int)) (~a1~0.base Int)) (let ((.cse24 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1244))) (let ((.cse21 (select .cse24 c_~a2~0.base)) (.cse20 (select .cse24 ~a1~0.base))) (let ((.cse23 (select .cse20 c_~a1~0.offset)) (.cse22 (select .cse21 c_~a2~0.offset))) (or (< (select .cse20 .cse3) (select .cse21 .cse8)) (< .cse22 .cse23) (= .cse22 .cse23) (< (+ 2147483647 .cse23) .cse22)))))) (<= 1 c_~n2~0) (<= 1 c_~n1~0) (forall ((~a1~0.base Int)) (let ((.cse25 (select |c_#memory_int| ~a1~0.base))) (let ((.cse26 (select .cse25 c_~a1~0.offset))) (or (< .cse4 (select .cse25 .cse3)) (< .cse26 .cse1) (= .cse26 .cse1) (< .cse12 .cse26))))))))) is different from false [2023-11-17 15:52:04,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 15:52:06,010 INFO L124 PetriNetUnfolderBase]: 4190/7636 cut-off events. [2023-11-17 15:52:06,010 INFO L125 PetriNetUnfolderBase]: For 216475/216475 co-relation queries the response was YES. [2023-11-17 15:52:06,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68996 conditions, 7636 events. 4190/7636 cut-off events. For 216475/216475 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 57364 event pairs, 1337 based on Foata normal form. 4/7640 useless extension candidates. Maximal degree in co-relation 68906. Up to 4872 conditions per place. [2023-11-17 15:52:06,088 INFO L140 encePairwiseOnDemand]: 533/548 looper letters, 448 selfloop transitions, 154 changer transitions 13/615 dead transitions. [2023-11-17 15:52:06,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 615 transitions, 14221 flow [2023-11-17 15:52:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 15:52:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 15:52:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2241 transitions. [2023-11-17 15:52:06,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31457046603032 [2023-11-17 15:52:06,090 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2241 transitions. [2023-11-17 15:52:06,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2241 transitions. [2023-11-17 15:52:06,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:06,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2241 transitions. [2023-11-17 15:52:06,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.3846153846154) internal successors, (2241), 13 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:06,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:06,095 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 548.0) internal successors, (7672), 14 states have internal predecessors, (7672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:06,095 INFO L175 Difference]: Start difference. First operand has 272 places, 494 transitions, 10607 flow. Second operand 13 states and 2241 transitions. [2023-11-17 15:52:06,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 615 transitions, 14221 flow [2023-11-17 15:52:07,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 615 transitions, 13998 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-11-17 15:52:07,395 INFO L231 Difference]: Finished difference. Result has 281 places, 517 transitions, 11406 flow [2023-11-17 15:52:07,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=10419, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11406, PETRI_PLACES=281, PETRI_TRANSITIONS=517} [2023-11-17 15:52:07,396 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2023-11-17 15:52:07,396 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 517 transitions, 11406 flow [2023-11-17 15:52:07,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.66666666666666) internal successors, (2012), 12 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:07,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:07,396 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] [2023-11-17 15:52:07,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 15:52:07,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 15:52:07,601 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:07,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:07,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1981524952, now seen corresponding path program 18 times [2023-11-17 15:52:07,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:07,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36289214] [2023-11-17 15:52:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:07,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:08,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:08,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36289214] [2023-11-17 15:52:08,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36289214] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:08,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915091699] [2023-11-17 15:52:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:52:08,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:08,204 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:08,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 15:52:08,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 15:52:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:08,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 15:52:08,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:08,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-17 15:52:08,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:52:08,717 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:52:08,717 INFO L378 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 [2023-11-17 15:52:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:52:08,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:52:08,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915091699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:52:08,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:52:08,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2023-11-17 15:52:08,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884469847] [2023-11-17 15:52:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:52:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:52:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:52:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2023-11-17 15:52:08,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 548 [2023-11-17 15:52:08,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 517 transitions, 11406 flow. Second operand has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:08,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:08,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 548 [2023-11-17 15:52:08,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:10,850 INFO L124 PetriNetUnfolderBase]: 4198/7641 cut-off events. [2023-11-17 15:52:10,850 INFO L125 PetriNetUnfolderBase]: For 233847/233847 co-relation queries the response was YES. [2023-11-17 15:52:10,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71908 conditions, 7641 events. 4198/7641 cut-off events. For 233847/233847 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 57382 event pairs, 1185 based on Foata normal form. 4/7645 useless extension candidates. Maximal degree in co-relation 71816. Up to 4865 conditions per place. [2023-11-17 15:52:10,920 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 375 selfloop transitions, 180 changer transitions 6/561 dead transitions. [2023-11-17 15:52:10,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 561 transitions, 13229 flow [2023-11-17 15:52:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:52:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:52:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2072 transitions. [2023-11-17 15:52:10,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34372926343729265 [2023-11-17 15:52:10,922 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2072 transitions. [2023-11-17 15:52:10,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2072 transitions. [2023-11-17 15:52:10,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:10,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2072 transitions. [2023-11-17 15:52:10,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 188.36363636363637) internal successors, (2072), 11 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:10,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:10,927 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:10,927 INFO L175 Difference]: Start difference. First operand has 281 places, 517 transitions, 11406 flow. Second operand 11 states and 2072 transitions. [2023-11-17 15:52:10,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 561 transitions, 13229 flow [2023-11-17 15:52:12,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 561 transitions, 12902 flow, removed 65 selfloop flow, removed 8 redundant places. [2023-11-17 15:52:12,448 INFO L231 Difference]: Finished difference. Result has 284 places, 521 transitions, 11655 flow [2023-11-17 15:52:12,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=11083, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11655, PETRI_PLACES=284, PETRI_TRANSITIONS=521} [2023-11-17 15:52:12,449 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2023-11-17 15:52:12,449 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 521 transitions, 11655 flow [2023-11-17 15:52:12,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:12,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:12,449 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] [2023-11-17 15:52:12,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-17 15:52:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-17 15:52:12,654 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:12,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -372405970, now seen corresponding path program 19 times [2023-11-17 15:52:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727642283] [2023-11-17 15:52:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:13,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727642283] [2023-11-17 15:52:13,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727642283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:13,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256062114] [2023-11-17 15:52:13,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:52:13,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:13,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:13,194 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:13,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 15:52:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:13,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 15:52:13,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:13,363 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-17 15:52:13,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 27 [2023-11-17 15:52:13,457 INFO L349 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2023-11-17 15:52:13,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2023-11-17 15:52:13,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 15:52:13,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 15:52:13,818 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 15:52:13,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 28 [2023-11-17 15:52:13,936 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:52:13,936 INFO L378 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 [2023-11-17 15:52:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:13,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:52:14,350 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (select (select |c_#memory_int| c_~a2~0.base) (+ (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) c_~a2~0.offset)))) (let ((.cse6 (< |c_thread1Thread1of1ForFork0_#t~mem3#1| .cse7))) (and (<= 1 c_~n2~0) (<= 1 c_~n1~0) (or (and (forall ((v_ArrVal_1318 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1318))) (let ((.cse0 (select (select .cse2 c_~a1~0.base) c_~a1~0.offset)) (.cse1 (select (select .cse2 c_~a2~0.base) c_~a2~0.offset))) (or (< .cse0 .cse1) (< (+ 2147483648 .cse1) .cse0) (= .cse0 .cse1))))) (or (forall ((v_ArrVal_1318 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1318))) (let ((.cse4 (select (select .cse5 c_~a1~0.base) c_~a1~0.offset)) (.cse3 (select (select .cse5 c_~a2~0.base) c_~a2~0.offset))) (or (< (+ 2147483648 .cse3) .cse4) (= .cse4 .cse3) (< (+ 2147483647 .cse4) .cse3))))) .cse6)) (< .cse7 |c_thread1Thread1of1ForFork0_#t~mem3#1|)) (or (forall ((v_ArrVal_1318 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1318))) (let ((.cse8 (select (select .cse10 c_~a1~0.base) c_~a1~0.offset)) (.cse9 (select (select .cse10 c_~a2~0.base) c_~a2~0.offset))) (or (= .cse8 .cse9) (< .cse9 .cse8) (< (+ 2147483647 .cse8) .cse9))))) .cse6)))) is different from false [2023-11-17 15:52:14,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:14,951 INFO L378 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 226 treesize of output 118 [2023-11-17 15:52:14,961 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:52:14,961 INFO L378 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 1890 treesize of output 1666 [2023-11-17 15:52:15,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:15,001 INFO L378 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 800 treesize of output 712 [2023-11-17 15:52:15,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:15,027 INFO L378 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 810 treesize of output 754 [2023-11-17 15:52:19,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:19,375 INFO L378 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 41 treesize of output 30 [2023-11-17 15:52:19,401 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:52:19,401 INFO L378 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 66 treesize of output 57 [2023-11-17 15:52:19,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:19,432 INFO L378 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 50 treesize of output 50 [2023-11-17 15:52:19,458 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-17 15:52:19,458 INFO L378 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 226 treesize of output 1 [2023-11-17 15:52:19,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:19,465 INFO L378 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 41 treesize of output 30 [2023-11-17 15:52:19,477 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-17 15:52:19,477 INFO L378 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 66 treesize of output 57 [2023-11-17 15:52:19,485 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:19,485 INFO L378 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 50 treesize of output 50 [2023-11-17 15:52:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256062114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:52:19,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:52:19,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 36 [2023-11-17 15:52:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162403756] [2023-11-17 15:52:19,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:52:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 15:52:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 15:52:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1157, Unknown=23, NotChecked=70, Total=1406 [2023-11-17 15:52:19,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 548 [2023-11-17 15:52:19,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 521 transitions, 11655 flow. Second operand has 38 states, 38 states have (on average 152.5) internal successors, (5795), 38 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:19,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:19,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 548 [2023-11-17 15:52:19,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:24,343 INFO L124 PetriNetUnfolderBase]: 5351/9834 cut-off events. [2023-11-17 15:52:24,343 INFO L125 PetriNetUnfolderBase]: For 299767/299767 co-relation queries the response was YES. [2023-11-17 15:52:24,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90002 conditions, 9834 events. 5351/9834 cut-off events. For 299767/299767 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 77760 event pairs, 447 based on Foata normal form. 52/9886 useless extension candidates. Maximal degree in co-relation 89908. Up to 3161 conditions per place. [2023-11-17 15:52:24,434 INFO L140 encePairwiseOnDemand]: 530/548 looper letters, 305 selfloop transitions, 431 changer transitions 21/757 dead transitions. [2023-11-17 15:52:24,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 757 transitions, 16695 flow [2023-11-17 15:52:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 15:52:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 15:52:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3310 transitions. [2023-11-17 15:52:24,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2876259993048314 [2023-11-17 15:52:24,438 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3310 transitions. [2023-11-17 15:52:24,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3310 transitions. [2023-11-17 15:52:24,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:24,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3310 transitions. [2023-11-17 15:52:24,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 157.61904761904762) internal successors, (3310), 21 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:24,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 548.0) internal successors, (12056), 22 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:24,446 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 548.0) internal successors, (12056), 22 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:24,446 INFO L175 Difference]: Start difference. First operand has 284 places, 521 transitions, 11655 flow. Second operand 21 states and 3310 transitions. [2023-11-17 15:52:24,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 757 transitions, 16695 flow [2023-11-17 15:52:26,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 757 transitions, 16415 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-11-17 15:52:26,764 INFO L231 Difference]: Finished difference. Result has 301 places, 634 transitions, 14507 flow [2023-11-17 15:52:26,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=11273, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=14507, PETRI_PLACES=301, PETRI_TRANSITIONS=634} [2023-11-17 15:52:26,764 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 276 predicate places. [2023-11-17 15:52:26,765 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 634 transitions, 14507 flow [2023-11-17 15:52:26,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 152.5) internal successors, (5795), 38 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:26,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:26,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:52:26,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-17 15:52:26,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-17 15:52:26,969 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash 803612158, now seen corresponding path program 20 times [2023-11-17 15:52:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176656402] [2023-11-17 15:52:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176656402] [2023-11-17 15:52:27,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176656402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:27,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811892951] [2023-11-17 15:52:27,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:52:27,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:27,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:27,390 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:27,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 15:52:27,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 15:52:27,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:27,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 15:52:27,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:27,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:52:27,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:52:27,817 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:52:27,817 INFO L378 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 [2023-11-17 15:52:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:52:27,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:52:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811892951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:52:27,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:52:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-11-17 15:52:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945046612] [2023-11-17 15:52:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:52:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:52:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:52:27,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-11-17 15:52:27,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 548 [2023-11-17 15:52:27,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 634 transitions, 14507 flow. Second operand has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:27,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:27,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 548 [2023-11-17 15:52:27,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:30,527 INFO L124 PetriNetUnfolderBase]: 5293/9692 cut-off events. [2023-11-17 15:52:30,527 INFO L125 PetriNetUnfolderBase]: For 346556/346556 co-relation queries the response was YES. [2023-11-17 15:52:30,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98070 conditions, 9692 events. 5293/9692 cut-off events. For 346556/346556 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 76034 event pairs, 1599 based on Foata normal form. 4/9696 useless extension candidates. Maximal degree in co-relation 97972. Up to 7206 conditions per place. [2023-11-17 15:52:30,652 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 472 selfloop transitions, 179 changer transitions 11/662 dead transitions. [2023-11-17 15:52:30,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 662 transitions, 16277 flow [2023-11-17 15:52:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:52:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:52:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2063 transitions. [2023-11-17 15:52:30,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34223623092236233 [2023-11-17 15:52:30,654 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2063 transitions. [2023-11-17 15:52:30,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2063 transitions. [2023-11-17 15:52:30,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:30,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2063 transitions. [2023-11-17 15:52:30,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.54545454545453) internal successors, (2063), 11 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:30,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:30,658 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:30,658 INFO L175 Difference]: Start difference. First operand has 301 places, 634 transitions, 14507 flow. Second operand 11 states and 2063 transitions. [2023-11-17 15:52:30,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 662 transitions, 16277 flow [2023-11-17 15:52:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 662 transitions, 15487 flow, removed 86 selfloop flow, removed 17 redundant places. [2023-11-17 15:52:33,586 INFO L231 Difference]: Finished difference. Result has 292 places, 633 transitions, 14105 flow [2023-11-17 15:52:33,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=13736, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14105, PETRI_PLACES=292, PETRI_TRANSITIONS=633} [2023-11-17 15:52:33,586 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2023-11-17 15:52:33,586 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 633 transitions, 14105 flow [2023-11-17 15:52:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:33,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:33,587 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] [2023-11-17 15:52:33,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 15:52:33,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 15:52:33,791 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:33,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:33,791 INFO L85 PathProgramCache]: Analyzing trace with hash 680034972, now seen corresponding path program 21 times [2023-11-17 15:52:33,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:33,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933717215] [2023-11-17 15:52:33,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:33,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:52:34,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933717215] [2023-11-17 15:52:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933717215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:34,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673613934] [2023-11-17 15:52:34,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:52:34,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:34,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:34,289 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:34,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 15:52:34,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 15:52:34,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:34,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 15:52:34,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:52:34,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-17 15:52:34,687 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:52:34,688 INFO L378 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 [2023-11-17 15:52:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:52:34,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 15:52:34,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673613934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:52:34,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 15:52:34,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 19 [2023-11-17 15:52:34,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102556827] [2023-11-17 15:52:34,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:52:34,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 15:52:34,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:34,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 15:52:34,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2023-11-17 15:52:34,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 548 [2023-11-17 15:52:34,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 633 transitions, 14105 flow. Second operand has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:34,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:34,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 548 [2023-11-17 15:52:34,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:37,339 INFO L124 PetriNetUnfolderBase]: 5285/9652 cut-off events. [2023-11-17 15:52:37,340 INFO L125 PetriNetUnfolderBase]: For 332414/332414 co-relation queries the response was YES. [2023-11-17 15:52:37,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96321 conditions, 9652 events. 5285/9652 cut-off events. For 332414/332414 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 75429 event pairs, 1567 based on Foata normal form. 4/9656 useless extension candidates. Maximal degree in co-relation 96228. Up to 7206 conditions per place. [2023-11-17 15:52:37,470 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 469 selfloop transitions, 183 changer transitions 6/658 dead transitions. [2023-11-17 15:52:37,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 658 transitions, 15762 flow [2023-11-17 15:52:37,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:52:37,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:52:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2065 transitions. [2023-11-17 15:52:37,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34256801592568015 [2023-11-17 15:52:37,472 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2065 transitions. [2023-11-17 15:52:37,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2065 transitions. [2023-11-17 15:52:37,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:37,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2065 transitions. [2023-11-17 15:52:37,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 187.72727272727272) internal successors, (2065), 11 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:37,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:37,476 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:37,477 INFO L175 Difference]: Start difference. First operand has 292 places, 633 transitions, 14105 flow. Second operand 11 states and 2065 transitions. [2023-11-17 15:52:37,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 658 transitions, 15762 flow [2023-11-17 15:52:40,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 658 transitions, 15398 flow, removed 11 selfloop flow, removed 9 redundant places. [2023-11-17 15:52:40,318 INFO L231 Difference]: Finished difference. Result has 291 places, 631 transitions, 14070 flow [2023-11-17 15:52:40,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=13743, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14070, PETRI_PLACES=291, PETRI_TRANSITIONS=631} [2023-11-17 15:52:40,319 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 266 predicate places. [2023-11-17 15:52:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 631 transitions, 14070 flow [2023-11-17 15:52:40,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 183.66666666666666) internal successors, (2204), 12 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:40,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:40,319 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] [2023-11-17 15:52:40,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-17 15:52:40,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:40,523 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:40,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash 165914048, now seen corresponding path program 2 times [2023-11-17 15:52:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:40,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911052137] [2023-11-17 15:52:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:40,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:40,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911052137] [2023-11-17 15:52:40,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911052137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:40,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714604130] [2023-11-17 15:52:40,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:52:40,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:40,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:40,693 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:40,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 15:52:40,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:52:40,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:40,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 15:52:40,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:41,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:41,032 INFO L378 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 127 treesize of output 108 [2023-11-17 15:52:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:41,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:52:41,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:41,126 INFO L378 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 145 treesize of output 125 [2023-11-17 15:52:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:41,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714604130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:52:41,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:52:41,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-11-17 15:52:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053634454] [2023-11-17 15:52:41,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:52:41,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 15:52:41,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 15:52:41,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2023-11-17 15:52:41,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:52:41,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 631 transitions, 14070 flow. Second operand has 27 states, 27 states have (on average 191.59259259259258) internal successors, (5173), 27 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:41,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:41,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:52:41,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:44,672 INFO L124 PetriNetUnfolderBase]: 6546/12020 cut-off events. [2023-11-17 15:52:44,673 INFO L125 PetriNetUnfolderBase]: For 416604/416604 co-relation queries the response was YES. [2023-11-17 15:52:44,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118988 conditions, 12020 events. 6546/12020 cut-off events. For 416604/416604 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 97770 event pairs, 2034 based on Foata normal form. 126/12146 useless extension candidates. Maximal degree in co-relation 118896. Up to 7190 conditions per place. [2023-11-17 15:52:44,834 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1018 selfloop transitions, 143 changer transitions 11/1172 dead transitions. [2023-11-17 15:52:44,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1172 transitions, 27192 flow [2023-11-17 15:52:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:52:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:52:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2380 transitions. [2023-11-17 15:52:44,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619221411192214 [2023-11-17 15:52:44,836 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2380 transitions. [2023-11-17 15:52:44,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2380 transitions. [2023-11-17 15:52:44,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:44,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2380 transitions. [2023-11-17 15:52:44,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:44,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:44,840 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:44,840 INFO L175 Difference]: Start difference. First operand has 291 places, 631 transitions, 14070 flow. Second operand 12 states and 2380 transitions. [2023-11-17 15:52:44,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1172 transitions, 27192 flow [2023-11-17 15:52:48,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1172 transitions, 26526 flow, removed 16 selfloop flow, removed 13 redundant places. [2023-11-17 15:52:48,622 INFO L231 Difference]: Finished difference. Result has 284 places, 705 transitions, 15844 flow [2023-11-17 15:52:48,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=13595, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15844, PETRI_PLACES=284, PETRI_TRANSITIONS=705} [2023-11-17 15:52:48,624 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2023-11-17 15:52:48,624 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 705 transitions, 15844 flow [2023-11-17 15:52:48,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 191.59259259259258) internal successors, (5173), 27 states have internal predecessors, (5173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:48,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:48,624 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] [2023-11-17 15:52:48,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-17 15:52:48,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:48,829 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:48,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:48,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1191877284, now seen corresponding path program 3 times [2023-11-17 15:52:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028378138] [2023-11-17 15:52:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028378138] [2023-11-17 15:52:49,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028378138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:49,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076264261] [2023-11-17 15:52:49,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:52:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:49,020 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:49,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 15:52:49,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:52:49,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:49,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 15:52:49,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:49,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:49,412 INFO L378 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 127 treesize of output 108 [2023-11-17 15:52:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:49,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:52:49,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:49,502 INFO L378 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 145 treesize of output 125 [2023-11-17 15:52:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:49,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076264261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:52:49,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:52:49,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-17 15:52:49,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239155469] [2023-11-17 15:52:49,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:52:49,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:52:49,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:52:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-11-17 15:52:49,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:52:49,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 705 transitions, 15844 flow. Second operand has 28 states, 28 states have (on average 191.82142857142858) internal successors, (5371), 28 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:49,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:49,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:52:49,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:52:53,815 INFO L124 PetriNetUnfolderBase]: 6594/12153 cut-off events. [2023-11-17 15:52:53,815 INFO L125 PetriNetUnfolderBase]: For 425529/425529 co-relation queries the response was YES. [2023-11-17 15:52:53,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121811 conditions, 12153 events. 6594/12153 cut-off events. For 425529/425529 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 99207 event pairs, 2036 based on Foata normal form. 48/12201 useless extension candidates. Maximal degree in co-relation 121720. Up to 7190 conditions per place. [2023-11-17 15:52:53,945 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 1062 selfloop transitions, 153 changer transitions 9/1224 dead transitions. [2023-11-17 15:52:53,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1224 transitions, 28187 flow [2023-11-17 15:52:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 15:52:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 15:52:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2784 transitions. [2023-11-17 15:52:53,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36287799791449427 [2023-11-17 15:52:53,965 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2784 transitions. [2023-11-17 15:52:53,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2784 transitions. [2023-11-17 15:52:53,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:52:53,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2784 transitions. [2023-11-17 15:52:53,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 198.85714285714286) internal successors, (2784), 14 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:53,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:53,971 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:53,971 INFO L175 Difference]: Start difference. First operand has 284 places, 705 transitions, 15844 flow. Second operand 14 states and 2784 transitions. [2023-11-17 15:52:53,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1224 transitions, 28187 flow [2023-11-17 15:52:57,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 1224 transitions, 27998 flow, removed 84 selfloop flow, removed 7 redundant places. [2023-11-17 15:52:58,009 INFO L231 Difference]: Finished difference. Result has 296 places, 762 transitions, 17493 flow [2023-11-17 15:52:58,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=15687, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=17493, PETRI_PLACES=296, PETRI_TRANSITIONS=762} [2023-11-17 15:52:58,010 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 271 predicate places. [2023-11-17 15:52:58,010 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 762 transitions, 17493 flow [2023-11-17 15:52:58,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 191.82142857142858) internal successors, (5371), 28 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:58,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:52:58,011 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] [2023-11-17 15:52:58,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-17 15:52:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-17 15:52:58,217 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:52:58,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:52:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1963864492, now seen corresponding path program 4 times [2023-11-17 15:52:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:52:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831219508] [2023-11-17 15:52:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:52:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:52:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:52:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:58,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:52:58,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831219508] [2023-11-17 15:52:58,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831219508] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:52:58,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792156998] [2023-11-17 15:52:58,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:52:58,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:52:58,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:52:58,389 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:52:58,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 15:52:58,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:52:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:52:58,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 15:52:58,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:52:58,688 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:58,689 INFO L378 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 104 treesize of output 93 [2023-11-17 15:52:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:58,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:52:58,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:52:58,982 INFO L378 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 145 treesize of output 125 [2023-11-17 15:52:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:52:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792156998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:52:59,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:52:59,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-17 15:52:59,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367655040] [2023-11-17 15:52:59,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:52:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:52:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:52:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:52:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-11-17 15:52:59,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 548 [2023-11-17 15:52:59,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 762 transitions, 17493 flow. Second operand has 28 states, 28 states have (on average 184.85714285714286) internal successors, (5176), 28 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:52:59,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:52:59,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 548 [2023-11-17 15:52:59,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:04,269 INFO L124 PetriNetUnfolderBase]: 8022/14432 cut-off events. [2023-11-17 15:53:04,269 INFO L125 PetriNetUnfolderBase]: For 570561/570561 co-relation queries the response was YES. [2023-11-17 15:53:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154509 conditions, 14432 events. 8022/14432 cut-off events. For 570561/570561 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 118460 event pairs, 1233 based on Foata normal form. 113/14545 useless extension candidates. Maximal degree in co-relation 154413. Up to 6301 conditions per place. [2023-11-17 15:53:04,419 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 900 selfloop transitions, 801 changer transitions 34/1735 dead transitions. [2023-11-17 15:53:04,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1735 transitions, 40167 flow [2023-11-17 15:53:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 15:53:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 15:53:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 7040 transitions. [2023-11-17 15:53:04,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34720852239100414 [2023-11-17 15:53:04,423 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 7040 transitions. [2023-11-17 15:53:04,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 7040 transitions. [2023-11-17 15:53:04,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:04,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 7040 transitions. [2023-11-17 15:53:04,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 190.27027027027026) internal successors, (7040), 37 states have internal predecessors, (7040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:04,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 548.0) internal successors, (20824), 38 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:04,436 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 548.0) internal successors, (20824), 38 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:04,436 INFO L175 Difference]: Start difference. First operand has 296 places, 762 transitions, 17493 flow. Second operand 37 states and 7040 transitions. [2023-11-17 15:53:04,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1735 transitions, 40167 flow [2023-11-17 15:53:11,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1735 transitions, 39871 flow, removed 141 selfloop flow, removed 6 redundant places. [2023-11-17 15:53:11,107 INFO L231 Difference]: Finished difference. Result has 346 places, 1288 transitions, 32364 flow [2023-11-17 15:53:11,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=17107, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=32364, PETRI_PLACES=346, PETRI_TRANSITIONS=1288} [2023-11-17 15:53:11,108 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 321 predicate places. [2023-11-17 15:53:11,108 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1288 transitions, 32364 flow [2023-11-17 15:53:11,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 184.85714285714286) internal successors, (5176), 28 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:11,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:11,109 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] [2023-11-17 15:53:11,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 15:53:11,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-17 15:53:11,314 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:53:11,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1578595090, now seen corresponding path program 5 times [2023-11-17 15:53:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:11,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997892857] [2023-11-17 15:53:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:11,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997892857] [2023-11-17 15:53:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997892857] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15659413] [2023-11-17 15:53:11,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:53:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:11,481 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:11,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 15:53:11,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:53:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:11,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 15:53:11,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:11,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:11,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:11,849 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:11,849 INFO L378 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 145 treesize of output 125 [2023-11-17 15:53:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:12,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15659413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:12,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:12,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-17 15:53:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757517870] [2023-11-17 15:53:12,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:53:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:53:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:53:12,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:53:12,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1288 transitions, 32364 flow. Second operand has 26 states, 26 states have (on average 191.69230769230768) internal successors, (4984), 26 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:12,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:12,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:53:12,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:17,845 INFO L124 PetriNetUnfolderBase]: 7665/14086 cut-off events. [2023-11-17 15:53:17,845 INFO L125 PetriNetUnfolderBase]: For 730309/730309 co-relation queries the response was YES. [2023-11-17 15:53:17,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160661 conditions, 14086 events. 7665/14086 cut-off events. For 730309/730309 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 118270 event pairs, 2171 based on Foata normal form. 340/14426 useless extension candidates. Maximal degree in co-relation 160546. Up to 6088 conditions per place. [2023-11-17 15:53:18,155 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1323 selfloop transitions, 237 changer transitions 11/1571 dead transitions. [2023-11-17 15:53:18,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1571 transitions, 40967 flow [2023-11-17 15:53:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 15:53:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 15:53:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2380 transitions. [2023-11-17 15:53:18,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619221411192214 [2023-11-17 15:53:18,157 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2380 transitions. [2023-11-17 15:53:18,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2380 transitions. [2023-11-17 15:53:18,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:18,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2380 transitions. [2023-11-17 15:53:18,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.33333333333334) internal successors, (2380), 12 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:18,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:18,162 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:18,162 INFO L175 Difference]: Start difference. First operand has 346 places, 1288 transitions, 32364 flow. Second operand 12 states and 2380 transitions. [2023-11-17 15:53:18,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1571 transitions, 40967 flow [2023-11-17 15:53:25,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1571 transitions, 38633 flow, removed 1053 selfloop flow, removed 9 redundant places. [2023-11-17 15:53:25,752 INFO L231 Difference]: Finished difference. Result has 351 places, 1334 transitions, 31913 flow [2023-11-17 15:53:25,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=29858, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=31913, PETRI_PLACES=351, PETRI_TRANSITIONS=1334} [2023-11-17 15:53:25,753 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 326 predicate places. [2023-11-17 15:53:25,753 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1334 transitions, 31913 flow [2023-11-17 15:53:25,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 191.69230769230768) internal successors, (4984), 26 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:25,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:25,754 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] [2023-11-17 15:53:25,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-17 15:53:25,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 15:53:25,958 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:53:25,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1926593756, now seen corresponding path program 6 times [2023-11-17 15:53:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903383123] [2023-11-17 15:53:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:26,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903383123] [2023-11-17 15:53:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903383123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:26,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193082854] [2023-11-17 15:53:26,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:53:26,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:26,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:26,214 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:26,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 15:53:26,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 15:53:26,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:53:26,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-17 15:53:26,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:26,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:26,620 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:26,621 INFO L378 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 145 treesize of output 125 [2023-11-17 15:53:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:26,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193082854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:26,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:26,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-17 15:53:26,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351572275] [2023-11-17 15:53:26,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:26,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 15:53:26,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 15:53:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2023-11-17 15:53:26,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:53:26,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1334 transitions, 31913 flow. Second operand has 28 states, 28 states have (on average 191.96428571428572) internal successors, (5375), 28 states have internal predecessors, (5375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:26,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:26,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:53:26,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:33,407 INFO L124 PetriNetUnfolderBase]: 7955/14776 cut-off events. [2023-11-17 15:53:33,407 INFO L125 PetriNetUnfolderBase]: For 624059/624059 co-relation queries the response was YES. [2023-11-17 15:53:33,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159213 conditions, 14776 events. 7955/14776 cut-off events. For 624059/624059 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 126198 event pairs, 2254 based on Foata normal form. 152/14928 useless extension candidates. Maximal degree in co-relation 159094. Up to 6088 conditions per place. [2023-11-17 15:53:33,561 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 1461 selfloop transitions, 230 changer transitions 14/1705 dead transitions. [2023-11-17 15:53:33,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1705 transitions, 42456 flow [2023-11-17 15:53:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 15:53:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 15:53:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2987 transitions. [2023-11-17 15:53:33,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36338199513381997 [2023-11-17 15:53:33,564 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2987 transitions. [2023-11-17 15:53:33,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2987 transitions. [2023-11-17 15:53:33,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:33,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2987 transitions. [2023-11-17 15:53:33,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 199.13333333333333) internal successors, (2987), 15 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:33,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:33,569 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:33,569 INFO L175 Difference]: Start difference. First operand has 351 places, 1334 transitions, 31913 flow. Second operand 15 states and 2987 transitions. [2023-11-17 15:53:33,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1705 transitions, 42456 flow [2023-11-17 15:53:40,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1705 transitions, 42034 flow, removed 205 selfloop flow, removed 5 redundant places. [2023-11-17 15:53:40,836 INFO L231 Difference]: Finished difference. Result has 366 places, 1428 transitions, 34865 flow [2023-11-17 15:53:40,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=31529, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=34865, PETRI_PLACES=366, PETRI_TRANSITIONS=1428} [2023-11-17 15:53:40,837 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 341 predicate places. [2023-11-17 15:53:40,837 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1428 transitions, 34865 flow [2023-11-17 15:53:40,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 191.96428571428572) internal successors, (5375), 28 states have internal predecessors, (5375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:40,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:40,838 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] [2023-11-17 15:53:40,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-17 15:53:41,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:41,043 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:53:41,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -787368236, now seen corresponding path program 7 times [2023-11-17 15:53:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:41,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366282585] [2023-11-17 15:53:41,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:41,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366282585] [2023-11-17 15:53:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366282585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085766962] [2023-11-17 15:53:41,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:53:41,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:41,217 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:41,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 15:53:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:41,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 15:53:41,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:41,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:41,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:53:41,602 INFO L378 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 145 treesize of output 125 [2023-11-17 15:53:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:53:41,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085766962] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:53:41,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:53:41,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-11-17 15:53:41,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402984] [2023-11-17 15:53:41,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:53:41,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 15:53:41,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:41,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 15:53:41,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-17 15:53:41,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 548 [2023-11-17 15:53:41,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1428 transitions, 34865 flow. Second operand has 26 states, 26 states have (on average 191.73076923076923) internal successors, (4985), 26 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:41,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:41,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 548 [2023-11-17 15:53:41,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:53:48,450 INFO L124 PetriNetUnfolderBase]: 7545/14170 cut-off events. [2023-11-17 15:53:48,451 INFO L125 PetriNetUnfolderBase]: For 663121/663121 co-relation queries the response was YES. [2023-11-17 15:53:48,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152875 conditions, 14170 events. 7545/14170 cut-off events. For 663121/663121 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 121897 event pairs, 2080 based on Foata normal form. 222/14392 useless extension candidates. Maximal degree in co-relation 152750. Up to 6088 conditions per place. [2023-11-17 15:53:48,600 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1424 selfloop transitions, 201 changer transitions 24/1649 dead transitions. [2023-11-17 15:53:48,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1649 transitions, 41731 flow [2023-11-17 15:53:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 15:53:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 15:53:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2782 transitions. [2023-11-17 15:53:48,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36261730969760164 [2023-11-17 15:53:48,603 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2782 transitions. [2023-11-17 15:53:48,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2782 transitions. [2023-11-17 15:53:48,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:53:48,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2782 transitions. [2023-11-17 15:53:48,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 198.71428571428572) internal successors, (2782), 14 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,608 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:48,608 INFO L175 Difference]: Start difference. First operand has 366 places, 1428 transitions, 34865 flow. Second operand 14 states and 2782 transitions. [2023-11-17 15:53:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1649 transitions, 41731 flow [2023-11-17 15:53:56,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1649 transitions, 41037 flow, removed 331 selfloop flow, removed 10 redundant places. [2023-11-17 15:53:56,702 INFO L231 Difference]: Finished difference. Result has 370 places, 1403 transitions, 33954 flow [2023-11-17 15:53:56,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33359, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=33954, PETRI_PLACES=370, PETRI_TRANSITIONS=1403} [2023-11-17 15:53:56,704 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 345 predicate places. [2023-11-17 15:53:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1403 transitions, 33954 flow [2023-11-17 15:53:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 191.73076923076923) internal successors, (4985), 26 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:56,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:53:56,705 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] [2023-11-17 15:53:56,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 15:53:56,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 15:53:56,910 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:53:56,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:53:56,910 INFO L85 PathProgramCache]: Analyzing trace with hash -638627770, now seen corresponding path program 1 times [2023-11-17 15:53:56,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:53:56,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757639082] [2023-11-17 15:53:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:56,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:53:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:53:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:53:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757639082] [2023-11-17 15:53:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757639082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665272357] [2023-11-17 15:53:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:53:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:53:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:53:57,068 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:53:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 15:53:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:53:57,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 15:53:57,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:53:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:53:57,431 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-17 15:53:57,436 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:53:57,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-17 15:53:57,447 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:53:57,467 INFO L378 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 15 treesize of output 1 [2023-11-17 15:53:57,493 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:53:57,493 INFO L378 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 [2023-11-17 15:53:57,528 INFO L378 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 15 treesize of output 1 [2023-11-17 15:53:57,554 INFO L378 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 8 treesize of output 1 [2023-11-17 15:53:57,575 INFO L378 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 8 treesize of output 1 [2023-11-17 15:53:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:53:57,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:53:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:53:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665272357] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 15:53:57,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 15:53:57,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 23 [2023-11-17 15:53:57,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251967076] [2023-11-17 15:53:57,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:53:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:53:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:53:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:53:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:53:57,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 548 [2023-11-17 15:53:57,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1403 transitions, 33954 flow. Second operand has 6 states, 6 states have (on average 211.5) internal successors, (1269), 6 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:53:57,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:53:57,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 548 [2023-11-17 15:53:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:04,088 INFO L124 PetriNetUnfolderBase]: 7574/14244 cut-off events. [2023-11-17 15:54:04,088 INFO L125 PetriNetUnfolderBase]: For 559247/559247 co-relation queries the response was YES. [2023-11-17 15:54:04,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149784 conditions, 14244 events. 7574/14244 cut-off events. For 559247/559247 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 122820 event pairs, 2798 based on Foata normal form. 30/14274 useless extension candidates. Maximal degree in co-relation 149661. Up to 12479 conditions per place. [2023-11-17 15:54:04,279 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1401 selfloop transitions, 119 changer transitions 0/1520 dead transitions. [2023-11-17 15:54:04,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1520 transitions, 39498 flow [2023-11-17 15:54:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:54:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:54:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1313 transitions. [2023-11-17 15:54:04,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39933090024330903 [2023-11-17 15:54:04,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1313 transitions. [2023-11-17 15:54:04,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1313 transitions. [2023-11-17 15:54:04,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:04,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1313 transitions. [2023-11-17 15:54:04,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.83333333333334) internal successors, (1313), 6 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:04,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:04,283 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:04,283 INFO L175 Difference]: Start difference. First operand has 370 places, 1403 transitions, 33954 flow. Second operand 6 states and 1313 transitions. [2023-11-17 15:54:04,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1520 transitions, 39498 flow [2023-11-17 15:54:11,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1520 transitions, 38764 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-11-17 15:54:11,847 INFO L231 Difference]: Finished difference. Result has 369 places, 1438 transitions, 34646 flow [2023-11-17 15:54:11,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=32921, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=34646, PETRI_PLACES=369, PETRI_TRANSITIONS=1438} [2023-11-17 15:54:11,849 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2023-11-17 15:54:11,849 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1438 transitions, 34646 flow [2023-11-17 15:54:11,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.5) internal successors, (1269), 6 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:11,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:11,849 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] [2023-11-17 15:54:11,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 15:54:12,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:12,055 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:54:12,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2141374612, now seen corresponding path program 2 times [2023-11-17 15:54:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:12,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852276196] [2023-11-17 15:54:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:12,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852276196] [2023-11-17 15:54:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852276196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:54:12,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714348893] [2023-11-17 15:54:12,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:54:12,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:12,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:54:12,218 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:54:12,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 15:54:12,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:54:12,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:54:12,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 15:54:12,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:54:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:12,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:54:12,516 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-17 15:54:12,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-17 15:54:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:12,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714348893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:54:12,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:54:12,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-17 15:54:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475143471] [2023-11-17 15:54:12,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:54:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 15:54:12,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 15:54:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:54:12,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:54:12,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1438 transitions, 34646 flow. Second operand has 14 states, 14 states have (on average 202.78571428571428) internal successors, (2839), 14 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:12,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:12,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:54:12,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:18,646 INFO L124 PetriNetUnfolderBase]: 7462/14006 cut-off events. [2023-11-17 15:54:18,646 INFO L125 PetriNetUnfolderBase]: For 531931/531931 co-relation queries the response was YES. [2023-11-17 15:54:18,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146127 conditions, 14006 events. 7462/14006 cut-off events. For 531931/531931 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 119900 event pairs, 2668 based on Foata normal form. 48/14054 useless extension candidates. Maximal degree in co-relation 146001. Up to 11004 conditions per place. [2023-11-17 15:54:18,812 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1251 selfloop transitions, 199 changer transitions 0/1450 dead transitions. [2023-11-17 15:54:18,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1450 transitions, 37775 flow [2023-11-17 15:54:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:54:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:54:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2023-11-17 15:54:18,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37750912408759124 [2023-11-17 15:54:18,815 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2023-11-17 15:54:18,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2023-11-17 15:54:18,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:18,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2023-11-17 15:54:18,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:18,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:18,818 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:18,818 INFO L175 Difference]: Start difference. First operand has 369 places, 1438 transitions, 34646 flow. Second operand 8 states and 1655 transitions. [2023-11-17 15:54:18,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1450 transitions, 37775 flow [2023-11-17 15:54:26,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1450 transitions, 37589 flow, removed 40 selfloop flow, removed 2 redundant places. [2023-11-17 15:54:26,634 INFO L231 Difference]: Finished difference. Result has 375 places, 1415 transitions, 34424 flow [2023-11-17 15:54:26,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33724, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=34424, PETRI_PLACES=375, PETRI_TRANSITIONS=1415} [2023-11-17 15:54:26,644 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 350 predicate places. [2023-11-17 15:54:26,644 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1415 transitions, 34424 flow [2023-11-17 15:54:26,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 202.78571428571428) internal successors, (2839), 14 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:26,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:26,644 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] [2023-11-17 15:54:26,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-17 15:54:26,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-17 15:54:26,849 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:54:26,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1188056342, now seen corresponding path program 3 times [2023-11-17 15:54:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:26,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116614151] [2023-11-17 15:54:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:27,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:27,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116614151] [2023-11-17 15:54:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116614151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:54:27,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:54:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 15:54:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302921470] [2023-11-17 15:54:27,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:54:27,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:54:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:54:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-17 15:54:27,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:54:27,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1415 transitions, 34424 flow. Second operand has 9 states, 9 states have (on average 202.33333333333334) internal successors, (1821), 9 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:27,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:27,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:54:27,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:33,042 INFO L124 PetriNetUnfolderBase]: 7427/13896 cut-off events. [2023-11-17 15:54:33,042 INFO L125 PetriNetUnfolderBase]: For 540364/540364 co-relation queries the response was YES. [2023-11-17 15:54:33,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145120 conditions, 13896 events. 7427/13896 cut-off events. For 540364/540364 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 118287 event pairs, 2600 based on Foata normal form. 44/13940 useless extension candidates. Maximal degree in co-relation 144993. Up to 11018 conditions per place. [2023-11-17 15:54:33,342 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1188 selfloop transitions, 247 changer transitions 0/1435 dead transitions. [2023-11-17 15:54:33,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1435 transitions, 37618 flow [2023-11-17 15:54:33,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:54:33,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:54:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1658 transitions. [2023-11-17 15:54:33,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781934306569343 [2023-11-17 15:54:33,344 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1658 transitions. [2023-11-17 15:54:33,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1658 transitions. [2023-11-17 15:54:33,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:33,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1658 transitions. [2023-11-17 15:54:33,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 207.25) internal successors, (1658), 8 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:33,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:33,347 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:33,347 INFO L175 Difference]: Start difference. First operand has 375 places, 1415 transitions, 34424 flow. Second operand 8 states and 1658 transitions. [2023-11-17 15:54:33,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1435 transitions, 37618 flow [2023-11-17 15:54:41,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1435 transitions, 37236 flow, removed 61 selfloop flow, removed 8 redundant places. [2023-11-17 15:54:41,357 INFO L231 Difference]: Finished difference. Result has 372 places, 1406 transitions, 34412 flow [2023-11-17 15:54:41,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33617, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=34412, PETRI_PLACES=372, PETRI_TRANSITIONS=1406} [2023-11-17 15:54:41,359 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 347 predicate places. [2023-11-17 15:54:41,359 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1406 transitions, 34412 flow [2023-11-17 15:54:41,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 202.33333333333334) internal successors, (1821), 9 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:41,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:41,359 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] [2023-11-17 15:54:41,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-11-17 15:54:41,359 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:54:41,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1840523368, now seen corresponding path program 4 times [2023-11-17 15:54:41,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:41,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139686616] [2023-11-17 15:54:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:41,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139686616] [2023-11-17 15:54:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139686616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:54:41,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198945407] [2023-11-17 15:54:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:54:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:54:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:54:41,547 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:54:41,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 15:54:41,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:54:41,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:54:41,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 15:54:41,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:54:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:41,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:54:41,794 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:54:41,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:54:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:41,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198945407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:54:41,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:54:41,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 16 [2023-11-17 15:54:41,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976779053] [2023-11-17 15:54:41,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:54:41,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 15:54:41,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 15:54:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-11-17 15:54:41,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:54:41,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1406 transitions, 34412 flow. Second operand has 16 states, 16 states have (on average 202.5625) internal successors, (3241), 16 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:41,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:41,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:54:41,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:54:48,267 INFO L124 PetriNetUnfolderBase]: 7346/13749 cut-off events. [2023-11-17 15:54:48,267 INFO L125 PetriNetUnfolderBase]: For 501149/501149 co-relation queries the response was YES. [2023-11-17 15:54:48,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142140 conditions, 13749 events. 7346/13749 cut-off events. For 501149/501149 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 116922 event pairs, 2451 based on Foata normal form. 30/13779 useless extension candidates. Maximal degree in co-relation 142015. Up to 11018 conditions per place. [2023-11-17 15:54:48,522 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1186 selfloop transitions, 257 changer transitions 2/1445 dead transitions. [2023-11-17 15:54:48,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1445 transitions, 37970 flow [2023-11-17 15:54:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:54:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:54:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2023-11-17 15:54:48,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781427412814274 [2023-11-17 15:54:48,524 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2023-11-17 15:54:48,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2023-11-17 15:54:48,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:54:48,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2023-11-17 15:54:48,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:48,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:48,527 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:48,527 INFO L175 Difference]: Start difference. First operand has 372 places, 1406 transitions, 34412 flow. Second operand 9 states and 1865 transitions. [2023-11-17 15:54:48,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1445 transitions, 37970 flow [2023-11-17 15:54:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1445 transitions, 37641 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-17 15:54:56,234 INFO L231 Difference]: Finished difference. Result has 375 places, 1397 transitions, 34550 flow [2023-11-17 15:54:56,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33806, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34550, PETRI_PLACES=375, PETRI_TRANSITIONS=1397} [2023-11-17 15:54:56,235 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 350 predicate places. [2023-11-17 15:54:56,235 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1397 transitions, 34550 flow [2023-11-17 15:54:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 202.5625) internal successors, (3241), 16 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:56,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:54:56,236 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] [2023-11-17 15:54:56,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-17 15:54:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-17 15:54:56,441 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:54:56,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:54:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash 673229372, now seen corresponding path program 5 times [2023-11-17 15:54:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:54:56,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876809817] [2023-11-17 15:54:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:54:56,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:54:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:54:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:54:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:54:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876809817] [2023-11-17 15:54:56,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876809817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:54:56,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:54:56,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 15:54:56,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404411980] [2023-11-17 15:54:56,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:54:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 15:54:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:54:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 15:54:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-17 15:54:56,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:54:56,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1397 transitions, 34550 flow. Second operand has 9 states, 9 states have (on average 202.33333333333334) internal successors, (1821), 9 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:54:56,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:54:56,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:54:56,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:55:02,748 INFO L124 PetriNetUnfolderBase]: 7337/13782 cut-off events. [2023-11-17 15:55:02,748 INFO L125 PetriNetUnfolderBase]: For 504367/504367 co-relation queries the response was YES. [2023-11-17 15:55:02,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142500 conditions, 13782 events. 7337/13782 cut-off events. For 504367/504367 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 117706 event pairs, 2123 based on Foata normal form. 30/13812 useless extension candidates. Maximal degree in co-relation 142374. Up to 10158 conditions per place. [2023-11-17 15:55:02,906 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 871 selfloop transitions, 584 changer transitions 0/1455 dead transitions. [2023-11-17 15:55:02,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1455 transitions, 38870 flow [2023-11-17 15:55:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:55:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:55:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1655 transitions. [2023-11-17 15:55:02,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37750912408759124 [2023-11-17 15:55:02,907 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1655 transitions. [2023-11-17 15:55:02,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1655 transitions. [2023-11-17 15:55:02,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:55:02,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1655 transitions. [2023-11-17 15:55:02,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 206.875) internal successors, (1655), 8 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:02,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:02,911 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:02,911 INFO L175 Difference]: Start difference. First operand has 375 places, 1397 transitions, 34550 flow. Second operand 8 states and 1655 transitions. [2023-11-17 15:55:02,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1455 transitions, 38870 flow [2023-11-17 15:55:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1455 transitions, 38343 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-17 15:55:10,895 INFO L231 Difference]: Finished difference. Result has 377 places, 1412 transitions, 35840 flow [2023-11-17 15:55:10,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33999, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=572, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=35840, PETRI_PLACES=377, PETRI_TRANSITIONS=1412} [2023-11-17 15:55:10,896 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 352 predicate places. [2023-11-17 15:55:10,896 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1412 transitions, 35840 flow [2023-11-17 15:55:10,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 202.33333333333334) internal successors, (1821), 9 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:10,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:55:10,896 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] [2023-11-17 15:55:10,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-11-17 15:55:10,896 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:55:10,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:55:10,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1246113008, now seen corresponding path program 6 times [2023-11-17 15:55:10,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:55:10,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351756077] [2023-11-17 15:55:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:55:10,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:55:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:11,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:55:11,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351756077] [2023-11-17 15:55:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351756077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:55:11,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:55:11,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 15:55:11,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673469079] [2023-11-17 15:55:11,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:55:11,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:55:11,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:55:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:55:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-17 15:55:11,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 548 [2023-11-17 15:55:11,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1412 transitions, 35840 flow. Second operand has 10 states, 10 states have (on average 197.1) internal successors, (1971), 10 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:11,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:55:11,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 548 [2023-11-17 15:55:11,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:55:17,647 INFO L124 PetriNetUnfolderBase]: 7288/13711 cut-off events. [2023-11-17 15:55:17,647 INFO L125 PetriNetUnfolderBase]: For 523081/523081 co-relation queries the response was YES. [2023-11-17 15:55:17,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143843 conditions, 13711 events. 7288/13711 cut-off events. For 523081/523081 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 117297 event pairs, 2538 based on Foata normal form. 22/13733 useless extension candidates. Maximal degree in co-relation 143716. Up to 11040 conditions per place. [2023-11-17 15:55:17,814 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1202 selfloop transitions, 240 changer transitions 0/1442 dead transitions. [2023-11-17 15:55:17,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1442 transitions, 39283 flow [2023-11-17 15:55:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:55:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:55:17,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1809 transitions. [2023-11-17 15:55:17,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36678832116788324 [2023-11-17 15:55:17,816 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1809 transitions. [2023-11-17 15:55:17,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1809 transitions. [2023-11-17 15:55:17,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:55:17,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1809 transitions. [2023-11-17 15:55:17,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.0) internal successors, (1809), 9 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:17,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:17,819 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:17,819 INFO L175 Difference]: Start difference. First operand has 377 places, 1412 transitions, 35840 flow. Second operand 9 states and 1809 transitions. [2023-11-17 15:55:17,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1442 transitions, 39283 flow [2023-11-17 15:55:25,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1442 transitions, 38636 flow, removed 32 selfloop flow, removed 5 redundant places. [2023-11-17 15:55:25,646 INFO L231 Difference]: Finished difference. Result has 381 places, 1411 transitions, 35686 flow [2023-11-17 15:55:25,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=35170, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=35686, PETRI_PLACES=381, PETRI_TRANSITIONS=1411} [2023-11-17 15:55:25,646 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 356 predicate places. [2023-11-17 15:55:25,646 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1411 transitions, 35686 flow [2023-11-17 15:55:25,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.1) internal successors, (1971), 10 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:25,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:55:25,647 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] [2023-11-17 15:55:25,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-11-17 15:55:25,647 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:55:25,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:55:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash -969046844, now seen corresponding path program 7 times [2023-11-17 15:55:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:55:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104046749] [2023-11-17 15:55:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:55:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:55:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:25,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:55:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104046749] [2023-11-17 15:55:25,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104046749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:55:25,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261398437] [2023-11-17 15:55:25,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:55:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:55:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:55:25,799 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:55:25,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 15:55:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:25,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 15:55:25,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:55:25,973 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:55:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:55:25,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2023-11-17 15:55:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 15:55:25,989 INFO L378 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 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-17 15:55:25,993 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-17 15:55:26,024 INFO L378 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 15 treesize of output 1 [2023-11-17 15:55:26,061 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 15:55:26,061 INFO L378 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 [2023-11-17 15:55:26,089 INFO L378 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 15 treesize of output 1 [2023-11-17 15:55:26,127 INFO L378 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 8 treesize of output 1 [2023-11-17 15:55:26,157 INFO L378 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 8 treesize of output 1 [2023-11-17 15:55:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:55:26,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:55:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:26,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261398437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:55:26,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:55:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 6] total 23 [2023-11-17 15:55:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512166063] [2023-11-17 15:55:26,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:55:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 15:55:26,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:55:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 15:55:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:55:26,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 548 [2023-11-17 15:55:26,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1411 transitions, 35686 flow. Second operand has 23 states, 23 states have (on average 176.2173913043478) internal successors, (4053), 23 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:26,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:55:26,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 548 [2023-11-17 15:55:26,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:55:32,663 INFO L124 PetriNetUnfolderBase]: 7136/13373 cut-off events. [2023-11-17 15:55:32,663 INFO L125 PetriNetUnfolderBase]: For 485375/485375 co-relation queries the response was YES. [2023-11-17 15:55:32,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140220 conditions, 13373 events. 7136/13373 cut-off events. For 485375/485375 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 113378 event pairs, 554 based on Foata normal form. 30/13403 useless extension candidates. Maximal degree in co-relation 140093. Up to 8327 conditions per place. [2023-11-17 15:55:32,811 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 819 selfloop transitions, 588 changer transitions 1/1408 dead transitions. [2023-11-17 15:55:32,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1408 transitions, 38102 flow [2023-11-17 15:55:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:55:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:55:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1795 transitions. [2023-11-17 15:55:32,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32755474452554745 [2023-11-17 15:55:32,813 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1795 transitions. [2023-11-17 15:55:32,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1795 transitions. [2023-11-17 15:55:32,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:55:32,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1795 transitions. [2023-11-17 15:55:32,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 179.5) internal successors, (1795), 10 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:32,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:32,816 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:32,816 INFO L175 Difference]: Start difference. First operand has 381 places, 1411 transitions, 35686 flow. Second operand 10 states and 1795 transitions. [2023-11-17 15:55:32,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1408 transitions, 38102 flow [2023-11-17 15:55:40,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1408 transitions, 37676 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-11-17 15:55:40,458 INFO L231 Difference]: Finished difference. Result has 381 places, 1360 transitions, 35294 flow [2023-11-17 15:55:40,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33965, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=585, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=35294, PETRI_PLACES=381, PETRI_TRANSITIONS=1360} [2023-11-17 15:55:40,459 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 356 predicate places. [2023-11-17 15:55:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1360 transitions, 35294 flow [2023-11-17 15:55:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 176.2173913043478) internal successors, (4053), 23 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:40,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:55:40,460 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] [2023-11-17 15:55:40,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-17 15:55:40,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-17 15:55:40,664 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:55:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:55:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1294841704, now seen corresponding path program 8 times [2023-11-17 15:55:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:55:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989577932] [2023-11-17 15:55:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:55:40,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:55:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:40,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:55:40,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989577932] [2023-11-17 15:55:40,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989577932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:55:40,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:55:40,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-17 15:55:40,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508001187] [2023-11-17 15:55:40,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:55:40,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 15:55:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:55:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 15:55:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-17 15:55:40,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 548 [2023-11-17 15:55:40,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1360 transitions, 35294 flow. Second operand has 11 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:40,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:55:40,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 548 [2023-11-17 15:55:40,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:55:46,994 INFO L124 PetriNetUnfolderBase]: 7228/13656 cut-off events. [2023-11-17 15:55:46,994 INFO L125 PetriNetUnfolderBase]: For 530609/530609 co-relation queries the response was YES. [2023-11-17 15:55:47,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144696 conditions, 13656 events. 7228/13656 cut-off events. For 530609/530609 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 117228 event pairs, 2518 based on Foata normal form. 60/13716 useless extension candidates. Maximal degree in co-relation 144569. Up to 11040 conditions per place. [2023-11-17 15:55:47,151 INFO L140 encePairwiseOnDemand]: 537/548 looper letters, 1218 selfloop transitions, 216 changer transitions 26/1460 dead transitions. [2023-11-17 15:55:47,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1460 transitions, 40251 flow [2023-11-17 15:55:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 15:55:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 15:55:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2214 transitions. [2023-11-17 15:55:47,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36728599867286 [2023-11-17 15:55:47,153 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2214 transitions. [2023-11-17 15:55:47,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2214 transitions. [2023-11-17 15:55:47,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:55:47,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2214 transitions. [2023-11-17 15:55:47,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 201.27272727272728) internal successors, (2214), 11 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:47,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:47,157 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 548.0) internal successors, (6576), 12 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:47,157 INFO L175 Difference]: Start difference. First operand has 381 places, 1360 transitions, 35294 flow. Second operand 11 states and 2214 transitions. [2023-11-17 15:55:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1460 transitions, 40251 flow [2023-11-17 15:55:54,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1460 transitions, 39036 flow, removed 26 selfloop flow, removed 7 redundant places. [2023-11-17 15:55:54,052 INFO L231 Difference]: Finished difference. Result has 386 places, 1354 transitions, 34421 flow [2023-11-17 15:55:54,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=34105, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=34421, PETRI_PLACES=386, PETRI_TRANSITIONS=1354} [2023-11-17 15:55:54,053 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 361 predicate places. [2023-11-17 15:55:54,053 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1354 transitions, 34421 flow [2023-11-17 15:55:54,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:54,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:55:54,054 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] [2023-11-17 15:55:54,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-11-17 15:55:54,054 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:55:54,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:55:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1638885824, now seen corresponding path program 9 times [2023-11-17 15:55:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:55:54,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910497202] [2023-11-17 15:55:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:55:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:55:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:55:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:54,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:55:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910497202] [2023-11-17 15:55:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910497202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:55:54,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964459587] [2023-11-17 15:55:54,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:55:54,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:55:54,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:55:54,209 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:55:54,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 15:55:54,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 15:55:54,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:55:54,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:55:54,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:55:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:54,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:55:54,530 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:55:54,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2023-11-17 15:55:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:55:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964459587] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:55:54,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:55:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2023-11-17 15:55:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048845525] [2023-11-17 15:55:54,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:55:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 15:55:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:55:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 15:55:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:55:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:55:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1354 transitions, 34421 flow. Second operand has 14 states, 14 states have (on average 202.78571428571428) internal successors, (2839), 14 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:55:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:55:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:55:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:00,051 INFO L124 PetriNetUnfolderBase]: 7054/13185 cut-off events. [2023-11-17 15:56:00,051 INFO L125 PetriNetUnfolderBase]: For 485594/485594 co-relation queries the response was YES. [2023-11-17 15:56:00,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137984 conditions, 13185 events. 7054/13185 cut-off events. For 485594/485594 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 111219 event pairs, 2115 based on Foata normal form. 22/13207 useless extension candidates. Maximal degree in co-relation 137855. Up to 9957 conditions per place. [2023-11-17 15:56:00,223 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 783 selfloop transitions, 570 changer transitions 0/1353 dead transitions. [2023-11-17 15:56:00,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1353 transitions, 36892 flow [2023-11-17 15:56:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:56:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:56:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1645 transitions. [2023-11-17 15:56:00,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37522810218978103 [2023-11-17 15:56:00,225 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1645 transitions. [2023-11-17 15:56:00,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1645 transitions. [2023-11-17 15:56:00,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:00,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1645 transitions. [2023-11-17 15:56:00,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 205.625) internal successors, (1645), 8 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:00,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:00,228 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:00,228 INFO L175 Difference]: Start difference. First operand has 386 places, 1354 transitions, 34421 flow. Second operand 8 states and 1645 transitions. [2023-11-17 15:56:00,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1353 transitions, 36892 flow [2023-11-17 15:56:07,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1353 transitions, 36273 flow, removed 40 selfloop flow, removed 13 redundant places. [2023-11-17 15:56:07,174 INFO L231 Difference]: Finished difference. Result has 379 places, 1331 transitions, 34374 flow [2023-11-17 15:56:07,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33218, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=761, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=34374, PETRI_PLACES=379, PETRI_TRANSITIONS=1331} [2023-11-17 15:56:07,175 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2023-11-17 15:56:07,175 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1331 transitions, 34374 flow [2023-11-17 15:56:07,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 202.78571428571428) internal successors, (2839), 14 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:07,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:07,175 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] [2023-11-17 15:56:07,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-17 15:56:07,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-17 15:56:07,377 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:07,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -863256836, now seen corresponding path program 10 times [2023-11-17 15:56:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68021038] [2023-11-17 15:56:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:56:07,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:07,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68021038] [2023-11-17 15:56:07,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68021038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:56:07,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:56:07,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 15:56:07,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381295329] [2023-11-17 15:56:07,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:56:07,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:56:07,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:56:07,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-17 15:56:07,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 548 [2023-11-17 15:56:07,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1331 transitions, 34374 flow. Second operand has 10 states, 10 states have (on average 197.1) internal successors, (1971), 10 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:07,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:07,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 548 [2023-11-17 15:56:07,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:13,427 INFO L124 PetriNetUnfolderBase]: 6972/13027 cut-off events. [2023-11-17 15:56:13,427 INFO L125 PetriNetUnfolderBase]: For 498693/498693 co-relation queries the response was YES. [2023-11-17 15:56:13,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137653 conditions, 13027 events. 6972/13027 cut-off events. For 498693/498693 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 109633 event pairs, 2532 based on Foata normal form. 30/13057 useless extension candidates. Maximal degree in co-relation 137526. Up to 11040 conditions per place. [2023-11-17 15:56:13,589 INFO L140 encePairwiseOnDemand]: 538/548 looper letters, 1121 selfloop transitions, 234 changer transitions 11/1366 dead transitions. [2023-11-17 15:56:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1366 transitions, 37679 flow [2023-11-17 15:56:13,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:56:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:56:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2006 transitions. [2023-11-17 15:56:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36605839416058394 [2023-11-17 15:56:13,591 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2006 transitions. [2023-11-17 15:56:13,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2006 transitions. [2023-11-17 15:56:13,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:13,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2006 transitions. [2023-11-17 15:56:13,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 200.6) internal successors, (2006), 10 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:13,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:13,595 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:13,595 INFO L175 Difference]: Start difference. First operand has 379 places, 1331 transitions, 34374 flow. Second operand 10 states and 2006 transitions. [2023-11-17 15:56:13,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1366 transitions, 37679 flow [2023-11-17 15:56:19,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1366 transitions, 36527 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-11-17 15:56:19,952 INFO L231 Difference]: Finished difference. Result has 382 places, 1328 transitions, 33635 flow [2023-11-17 15:56:19,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=33222, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1097, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=33635, PETRI_PLACES=382, PETRI_TRANSITIONS=1328} [2023-11-17 15:56:19,953 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 357 predicate places. [2023-11-17 15:56:19,953 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1328 transitions, 33635 flow [2023-11-17 15:56:19,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 197.1) internal successors, (1971), 10 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:19,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:19,953 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] [2023-11-17 15:56:19,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-11-17 15:56:19,954 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:19,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:19,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1009504192, now seen corresponding path program 11 times [2023-11-17 15:56:19,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:19,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603559234] [2023-11-17 15:56:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:56:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:20,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603559234] [2023-11-17 15:56:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603559234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:56:20,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:56:20,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 15:56:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758630905] [2023-11-17 15:56:20,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:56:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:56:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:56:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-17 15:56:20,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 548 [2023-11-17 15:56:20,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1328 transitions, 33635 flow. Second operand has 10 states, 10 states have (on average 190.1) internal successors, (1901), 10 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:20,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:20,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 548 [2023-11-17 15:56:20,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:25,693 INFO L124 PetriNetUnfolderBase]: 6763/12626 cut-off events. [2023-11-17 15:56:25,694 INFO L125 PetriNetUnfolderBase]: For 463064/463064 co-relation queries the response was YES. [2023-11-17 15:56:25,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131386 conditions, 12626 events. 6763/12626 cut-off events. For 463064/463064 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 105478 event pairs, 2456 based on Foata normal form. 90/12716 useless extension candidates. Maximal degree in co-relation 131259. Up to 11040 conditions per place. [2023-11-17 15:56:25,833 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1085 selfloop transitions, 200 changer transitions 41/1326 dead transitions. [2023-11-17 15:56:25,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1326 transitions, 35903 flow [2023-11-17 15:56:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 15:56:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 15:56:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1943 transitions. [2023-11-17 15:56:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35456204379562045 [2023-11-17 15:56:25,835 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1943 transitions. [2023-11-17 15:56:25,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1943 transitions. [2023-11-17 15:56:25,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:25,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1943 transitions. [2023-11-17 15:56:25,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.3) internal successors, (1943), 10 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:25,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:25,838 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 548.0) internal successors, (6028), 11 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:25,838 INFO L175 Difference]: Start difference. First operand has 382 places, 1328 transitions, 33635 flow. Second operand 10 states and 1943 transitions. [2023-11-17 15:56:25,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1326 transitions, 35903 flow [2023-11-17 15:56:31,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1326 transitions, 34821 flow, removed 21 selfloop flow, removed 19 redundant places. [2023-11-17 15:56:31,692 INFO L231 Difference]: Finished difference. Result has 369 places, 1251 transitions, 31097 flow [2023-11-17 15:56:31,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=31498, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=31097, PETRI_PLACES=369, PETRI_TRANSITIONS=1251} [2023-11-17 15:56:31,693 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2023-11-17 15:56:31,693 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1251 transitions, 31097 flow [2023-11-17 15:56:31,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 190.1) internal successors, (1901), 10 states have internal predecessors, (1901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:31,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:31,694 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] [2023-11-17 15:56:31,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-11-17 15:56:31,694 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:31,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash -506565040, now seen corresponding path program 12 times [2023-11-17 15:56:31,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:31,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149629941] [2023-11-17 15:56:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:31,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 15:56:31,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:31,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149629941] [2023-11-17 15:56:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149629941] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:56:31,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:56:31,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 15:56:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841207177] [2023-11-17 15:56:31,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:56:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 15:56:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 15:56:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-17 15:56:31,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 548 [2023-11-17 15:56:31,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1251 transitions, 31097 flow. Second operand has 10 states, 10 states have (on average 202.1) internal successors, (2021), 10 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:31,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:31,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 548 [2023-11-17 15:56:31,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:36,695 INFO L124 PetriNetUnfolderBase]: 6492/11978 cut-off events. [2023-11-17 15:56:36,695 INFO L125 PetriNetUnfolderBase]: For 433665/433665 co-relation queries the response was YES. [2023-11-17 15:56:36,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123667 conditions, 11978 events. 6492/11978 cut-off events. For 433665/433665 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 97886 event pairs, 2451 based on Foata normal form. 60/12038 useless extension candidates. Maximal degree in co-relation 123545. Up to 11040 conditions per place. [2023-11-17 15:56:36,824 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1005 selfloop transitions, 202 changer transitions 14/1221 dead transitions. [2023-11-17 15:56:36,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1221 transitions, 32700 flow [2023-11-17 15:56:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 15:56:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 15:56:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1847 transitions. [2023-11-17 15:56:36,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37449310624493104 [2023-11-17 15:56:36,826 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1847 transitions. [2023-11-17 15:56:36,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1847 transitions. [2023-11-17 15:56:36,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:36,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1847 transitions. [2023-11-17 15:56:36,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.22222222222223) internal successors, (1847), 9 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:36,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:36,830 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 548.0) internal successors, (5480), 10 states have internal predecessors, (5480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:36,830 INFO L175 Difference]: Start difference. First operand has 369 places, 1251 transitions, 31097 flow. Second operand 9 states and 1847 transitions. [2023-11-17 15:56:36,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1221 transitions, 32700 flow [2023-11-17 15:56:42,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1221 transitions, 31285 flow, removed 56 selfloop flow, removed 24 redundant places. [2023-11-17 15:56:42,367 INFO L231 Difference]: Finished difference. Result has 339 places, 1197 transitions, 28864 flow [2023-11-17 15:56:42,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=28641, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=28864, PETRI_PLACES=339, PETRI_TRANSITIONS=1197} [2023-11-17 15:56:42,368 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 314 predicate places. [2023-11-17 15:56:42,368 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1197 transitions, 28864 flow [2023-11-17 15:56:42,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 202.1) internal successors, (2021), 10 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:42,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:42,368 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] [2023-11-17 15:56:42,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-11-17 15:56:42,368 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:42,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:42,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1491516568, now seen corresponding path program 8 times [2023-11-17 15:56:42,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:42,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429862871] [2023-11-17 15:56:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:42,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:56:42,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:42,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429862871] [2023-11-17 15:56:42,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429862871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:56:42,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723466506] [2023-11-17 15:56:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:56:42,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:56:42,504 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:56:42,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 15:56:42,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:56:42,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:56:42,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 15:56:42,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:56:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:56:42,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:56:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:56:42,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723466506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:56:42,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:56:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-17 15:56:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557423894] [2023-11-17 15:56:42,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:56:42,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 15:56:42,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:42,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 15:56:42,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:56:42,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 548 [2023-11-17 15:56:42,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1197 transitions, 28864 flow. Second operand has 23 states, 23 states have (on average 198.82608695652175) internal successors, (4573), 23 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:42,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:42,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 548 [2023-11-17 15:56:42,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:47,934 INFO L124 PetriNetUnfolderBase]: 6347/11674 cut-off events. [2023-11-17 15:56:47,935 INFO L125 PetriNetUnfolderBase]: For 398467/398467 co-relation queries the response was YES. [2023-11-17 15:56:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118498 conditions, 11674 events. 6347/11674 cut-off events. For 398467/398467 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 94022 event pairs, 1175 based on Foata normal form. 48/11722 useless extension candidates. Maximal degree in co-relation 118385. Up to 4511 conditions per place. [2023-11-17 15:56:48,051 INFO L140 encePairwiseOnDemand]: 539/548 looper letters, 1105 selfloop transitions, 274 changer transitions 8/1387 dead transitions. [2023-11-17 15:56:48,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1387 transitions, 34967 flow [2023-11-17 15:56:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 15:56:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 15:56:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3074 transitions. [2023-11-17 15:56:48,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3739659367396594 [2023-11-17 15:56:48,053 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3074 transitions. [2023-11-17 15:56:48,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3074 transitions. [2023-11-17 15:56:48,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:48,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3074 transitions. [2023-11-17 15:56:48,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 204.93333333333334) internal successors, (3074), 15 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:48,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:48,059 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 548.0) internal successors, (8768), 16 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:48,059 INFO L175 Difference]: Start difference. First operand has 339 places, 1197 transitions, 28864 flow. Second operand 15 states and 3074 transitions. [2023-11-17 15:56:48,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1387 transitions, 34967 flow [2023-11-17 15:56:52,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 1387 transitions, 33775 flow, removed 64 selfloop flow, removed 17 redundant places. [2023-11-17 15:56:52,722 INFO L231 Difference]: Finished difference. Result has 322 places, 1205 transitions, 28732 flow [2023-11-17 15:56:52,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=27745, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=927, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28732, PETRI_PLACES=322, PETRI_TRANSITIONS=1205} [2023-11-17 15:56:52,723 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2023-11-17 15:56:52,724 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1205 transitions, 28732 flow [2023-11-17 15:56:52,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 198.82608695652175) internal successors, (4573), 23 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:52,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:52,724 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] [2023-11-17 15:56:52,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-17 15:56:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:52,930 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:52,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash 106575952, now seen corresponding path program 1 times [2023-11-17 15:56:52,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77544201] [2023-11-17 15:56:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:56:52,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77544201] [2023-11-17 15:56:52,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77544201] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:56:52,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306382002] [2023-11-17 15:56:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:52,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:56:52,997 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:56:53,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 15:56:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:53,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 15:56:53,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:56:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:56:53,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:56:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:56:53,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306382002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:56:53,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:56:53,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-11-17 15:56:53,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831355282] [2023-11-17 15:56:53,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:56:53,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 15:56:53,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:53,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 15:56:53,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-17 15:56:53,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 548 [2023-11-17 15:56:53,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1205 transitions, 28732 flow. Second operand has 16 states, 16 states have (on average 199.8125) internal successors, (3197), 16 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:53,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:53,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 548 [2023-11-17 15:56:53,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:56:55,261 INFO L124 PetriNetUnfolderBase]: 2610/4714 cut-off events. [2023-11-17 15:56:55,261 INFO L125 PetriNetUnfolderBase]: For 181002/181002 co-relation queries the response was YES. [2023-11-17 15:56:55,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49004 conditions, 4714 events. 2610/4714 cut-off events. For 181002/181002 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 30993 event pairs, 842 based on Foata normal form. 170/4884 useless extension candidates. Maximal degree in co-relation 48895. Up to 2875 conditions per place. [2023-11-17 15:56:55,313 INFO L140 encePairwiseOnDemand]: 540/548 looper letters, 378 selfloop transitions, 6 changer transitions 305/689 dead transitions. [2023-11-17 15:56:55,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 689 transitions, 16883 flow [2023-11-17 15:56:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 15:56:55,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 15:56:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3464 transitions. [2023-11-17 15:56:55,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37183340489480465 [2023-11-17 15:56:55,316 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3464 transitions. [2023-11-17 15:56:55,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3464 transitions. [2023-11-17 15:56:55,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:56:55,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3464 transitions. [2023-11-17 15:56:55,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 203.76470588235293) internal successors, (3464), 17 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:55,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:55,322 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 548.0) internal successors, (9864), 18 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:55,322 INFO L175 Difference]: Start difference. First operand has 322 places, 1205 transitions, 28732 flow. Second operand 17 states and 3464 transitions. [2023-11-17 15:56:55,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 689 transitions, 16883 flow [2023-11-17 15:56:56,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 689 transitions, 15993 flow, removed 171 selfloop flow, removed 28 redundant places. [2023-11-17 15:56:56,512 INFO L231 Difference]: Finished difference. Result has 306 places, 384 transitions, 7684 flow [2023-11-17 15:56:56,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=14095, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7684, PETRI_PLACES=306, PETRI_TRANSITIONS=384} [2023-11-17 15:56:56,512 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 281 predicate places. [2023-11-17 15:56:56,512 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 384 transitions, 7684 flow [2023-11-17 15:56:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 199.8125) internal successors, (3197), 16 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:56,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:56:56,513 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:56:56,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 15:56:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:56,718 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:56:56,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:56:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1426461328, now seen corresponding path program 9 times [2023-11-17 15:56:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:56:56,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250305003] [2023-11-17 15:56:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:56:56,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:56:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:56:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:56:57,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:56:57,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250305003] [2023-11-17 15:56:57,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250305003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:56:57,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379066827] [2023-11-17 15:56:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:56:57,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:56:57,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:56:57,173 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:56:57,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 15:56:57,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 15:56:57,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:56:57,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 15:56:57,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:56:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:56:57,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:56:57,999 INFO L349 Elim1Store]: treesize reduction 28, result has 61.6 percent of original size [2023-11-17 15:56:57,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 62 [2023-11-17 15:56:58,015 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:56:58,015 INFO L378 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 16 treesize of output 4 [2023-11-17 15:56:58,019 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:56:58,019 INFO L378 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 16 treesize of output 4 [2023-11-17 15:56:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:56:58,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379066827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:56:58,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:56:58,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-11-17 15:56:58,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596365372] [2023-11-17 15:56:58,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:56:58,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 15:56:58,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:56:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 15:56:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 15:56:58,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:56:58,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 384 transitions, 7684 flow. Second operand has 40 states, 40 states have (on average 173.6) internal successors, (6944), 40 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:56:58,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:56:58,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:56:58,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:00,634 INFO L124 PetriNetUnfolderBase]: 3834/6332 cut-off events. [2023-11-17 15:57:00,634 INFO L125 PetriNetUnfolderBase]: For 219605/219605 co-relation queries the response was YES. [2023-11-17 15:57:00,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62282 conditions, 6332 events. 3834/6332 cut-off events. For 219605/219605 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 40339 event pairs, 420 based on Foata normal form. 178/6510 useless extension candidates. Maximal degree in co-relation 62189. Up to 2893 conditions per place. [2023-11-17 15:57:00,704 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 741 selfloop transitions, 284 changer transitions 0/1025 dead transitions. [2023-11-17 15:57:00,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1025 transitions, 22117 flow [2023-11-17 15:57:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 15:57:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 15:57:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4835 transitions. [2023-11-17 15:57:00,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267775074344417 [2023-11-17 15:57:00,708 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4835 transitions. [2023-11-17 15:57:00,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4835 transitions. [2023-11-17 15:57:00,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:00,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4835 transitions. [2023-11-17 15:57:00,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 179.07407407407408) internal successors, (4835), 27 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:00,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 548.0) internal successors, (15344), 28 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:00,717 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 548.0) internal successors, (15344), 28 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:00,717 INFO L175 Difference]: Start difference. First operand has 306 places, 384 transitions, 7684 flow. Second operand 27 states and 4835 transitions. [2023-11-17 15:57:00,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1025 transitions, 22117 flow [2023-11-17 15:57:02,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 1025 transitions, 20779 flow, removed 312 selfloop flow, removed 36 redundant places. [2023-11-17 15:57:02,073 INFO L231 Difference]: Finished difference. Result has 237 places, 569 transitions, 12306 flow [2023-11-17 15:57:02,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12306, PETRI_PLACES=237, PETRI_TRANSITIONS=569} [2023-11-17 15:57:02,073 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 212 predicate places. [2023-11-17 15:57:02,073 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 569 transitions, 12306 flow [2023-11-17 15:57:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 173.6) internal successors, (6944), 40 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:02,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:02,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:02,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:02,280 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:02,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash -569139554, now seen corresponding path program 10 times [2023-11-17 15:57:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:02,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188949753] [2023-11-17 15:57:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:02,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:02,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188949753] [2023-11-17 15:57:02,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188949753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:02,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005363485] [2023-11-17 15:57:02,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:57:02,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:02,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:02,698 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:02,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 15:57:02,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:57:02,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:02,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:57:02,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 15:57:03,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:03,497 INFO L349 Elim1Store]: treesize reduction 13, result has 93.4 percent of original size [2023-11-17 15:57:03,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 218 [2023-11-17 15:57:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:13,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005363485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:13,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:13,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-11-17 15:57:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669426984] [2023-11-17 15:57:13,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:13,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 15:57:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 15:57:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2023-11-17 15:57:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:57:13,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 569 transitions, 12306 flow. Second operand has 31 states, 31 states have (on average 174.03225806451613) internal successors, (5395), 31 states have internal predecessors, (5395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:13,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:13,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:57:13,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:15,594 INFO L124 PetriNetUnfolderBase]: 4021/6733 cut-off events. [2023-11-17 15:57:15,594 INFO L125 PetriNetUnfolderBase]: For 174769/174769 co-relation queries the response was YES. [2023-11-17 15:57:15,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64322 conditions, 6733 events. 4021/6733 cut-off events. For 174769/174769 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 43758 event pairs, 758 based on Foata normal form. 72/6805 useless extension candidates. Maximal degree in co-relation 64240. Up to 3066 conditions per place. [2023-11-17 15:57:15,674 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 698 selfloop transitions, 288 changer transitions 0/986 dead transitions. [2023-11-17 15:57:15,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 986 transitions, 21622 flow [2023-11-17 15:57:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 15:57:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 15:57:15,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4461 transitions. [2023-11-17 15:57:15,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3256204379562044 [2023-11-17 15:57:15,677 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4461 transitions. [2023-11-17 15:57:15,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4461 transitions. [2023-11-17 15:57:15,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:15,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4461 transitions. [2023-11-17 15:57:15,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 178.44) internal successors, (4461), 25 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:15,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 548.0) internal successors, (14248), 26 states have internal predecessors, (14248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:15,686 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 548.0) internal successors, (14248), 26 states have internal predecessors, (14248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:15,686 INFO L175 Difference]: Start difference. First operand has 237 places, 569 transitions, 12306 flow. Second operand 25 states and 4461 transitions. [2023-11-17 15:57:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 986 transitions, 21622 flow [2023-11-17 15:57:17,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 986 transitions, 21143 flow, removed 93 selfloop flow, removed 9 redundant places. [2023-11-17 15:57:17,031 INFO L231 Difference]: Finished difference. Result has 261 places, 619 transitions, 13797 flow [2023-11-17 15:57:17,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=11900, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=13797, PETRI_PLACES=261, PETRI_TRANSITIONS=619} [2023-11-17 15:57:17,032 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 236 predicate places. [2023-11-17 15:57:17,032 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 619 transitions, 13797 flow [2023-11-17 15:57:17,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 174.03225806451613) internal successors, (5395), 31 states have internal predecessors, (5395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:17,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:17,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:17,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:17,237 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:17,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1250888618, now seen corresponding path program 11 times [2023-11-17 15:57:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114787018] [2023-11-17 15:57:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114787018] [2023-11-17 15:57:17,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114787018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939783994] [2023-11-17 15:57:17,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:57:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:17,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:17,704 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:17,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 15:57:17,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 15:57:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:17,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:57:17,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:18,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:18,484 INFO L349 Elim1Store]: treesize reduction 35, result has 80.0 percent of original size [2023-11-17 15:57:18,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 119 treesize of output 175 [2023-11-17 15:57:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:57:18,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939783994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:18,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:18,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 15:57:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454605600] [2023-11-17 15:57:18,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 15:57:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 15:57:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-11-17 15:57:18,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:57:18,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 619 transitions, 13797 flow. Second operand has 30 states, 30 states have (on average 174.06666666666666) internal successors, (5222), 30 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:18,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:18,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:57:18,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:21,658 INFO L124 PetriNetUnfolderBase]: 4309/7231 cut-off events. [2023-11-17 15:57:21,658 INFO L125 PetriNetUnfolderBase]: For 206186/206186 co-relation queries the response was YES. [2023-11-17 15:57:21,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71824 conditions, 7231 events. 4309/7231 cut-off events. For 206186/206186 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 48270 event pairs, 771 based on Foata normal form. 72/7303 useless extension candidates. Maximal degree in co-relation 71735. Up to 3240 conditions per place. [2023-11-17 15:57:21,736 INFO L140 encePairwiseOnDemand]: 535/548 looper letters, 720 selfloop transitions, 327 changer transitions 0/1047 dead transitions. [2023-11-17 15:57:21,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1047 transitions, 23780 flow [2023-11-17 15:57:21,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 15:57:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 15:57:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4814 transitions. [2023-11-17 15:57:21,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253582049202487 [2023-11-17 15:57:21,739 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4814 transitions. [2023-11-17 15:57:21,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4814 transitions. [2023-11-17 15:57:21,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:21,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4814 transitions. [2023-11-17 15:57:21,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 178.2962962962963) internal successors, (4814), 27 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 548.0) internal successors, (15344), 28 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,749 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 548.0) internal successors, (15344), 28 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:21,749 INFO L175 Difference]: Start difference. First operand has 261 places, 619 transitions, 13797 flow. Second operand 27 states and 4814 transitions. [2023-11-17 15:57:21,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1047 transitions, 23780 flow [2023-11-17 15:57:23,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1047 transitions, 23481 flow, removed 40 selfloop flow, removed 14 redundant places. [2023-11-17 15:57:23,392 INFO L231 Difference]: Finished difference. Result has 279 places, 663 transitions, 15472 flow [2023-11-17 15:57:23,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=13500, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=15472, PETRI_PLACES=279, PETRI_TRANSITIONS=663} [2023-11-17 15:57:23,392 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2023-11-17 15:57:23,392 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 663 transitions, 15472 flow [2023-11-17 15:57:23,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 174.06666666666666) internal successors, (5222), 30 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:23,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:23,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:23,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-17 15:57:23,599 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:23,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 285280414, now seen corresponding path program 12 times [2023-11-17 15:57:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134059293] [2023-11-17 15:57:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:23,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134059293] [2023-11-17 15:57:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134059293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356322185] [2023-11-17 15:57:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:57:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:23,977 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:23,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 15:57:24,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 15:57:24,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:24,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 15:57:24,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:24,303 INFO L378 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 15 treesize of output 1 [2023-11-17 15:57:24,343 INFO L378 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 8 treesize of output 1 [2023-11-17 15:57:24,377 INFO L378 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 8 treesize of output 1 [2023-11-17 15:57:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:24,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:25,065 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,066 INFO L378 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 52 treesize of output 41 [2023-11-17 15:57:25,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,074 INFO L378 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 358 treesize of output 322 [2023-11-17 15:57:25,083 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,083 INFO L378 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 310 treesize of output 255 [2023-11-17 15:57:25,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,094 INFO L378 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 246 treesize of output 223 [2023-11-17 15:57:25,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,189 INFO L378 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 52 treesize of output 41 [2023-11-17 15:57:25,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,197 INFO L378 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 726 treesize of output 642 [2023-11-17 15:57:25,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,209 INFO L378 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 310 treesize of output 287 [2023-11-17 15:57:25,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:57:25,219 INFO L378 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 278 treesize of output 223 [2023-11-17 15:57:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:25,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356322185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:25,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:25,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-11-17 15:57:25,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107135857] [2023-11-17 15:57:25,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:25,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 15:57:25,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:25,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 15:57:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1495, Unknown=13, NotChecked=0, Total=1806 [2023-11-17 15:57:25,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:57:25,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 663 transitions, 15472 flow. Second operand has 43 states, 43 states have (on average 164.4418604651163) internal successors, (7071), 43 states have internal predecessors, (7071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:25,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:25,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:57:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:29,818 INFO L124 PetriNetUnfolderBase]: 7126/11923 cut-off events. [2023-11-17 15:57:29,819 INFO L125 PetriNetUnfolderBase]: For 385619/385619 co-relation queries the response was YES. [2023-11-17 15:57:30,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122858 conditions, 11923 events. 7126/11923 cut-off events. For 385619/385619 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 86631 event pairs, 1228 based on Foata normal form. 36/11959 useless extension candidates. Maximal degree in co-relation 122764. Up to 5377 conditions per place. [2023-11-17 15:57:30,314 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 955 selfloop transitions, 464 changer transitions 0/1419 dead transitions. [2023-11-17 15:57:30,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1419 transitions, 34383 flow [2023-11-17 15:57:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 15:57:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 15:57:30,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 7420 transitions. [2023-11-17 15:57:30,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3077305905773059 [2023-11-17 15:57:30,319 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 7420 transitions. [2023-11-17 15:57:30,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 7420 transitions. [2023-11-17 15:57:30,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:30,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 7420 transitions. [2023-11-17 15:57:30,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 168.63636363636363) internal successors, (7420), 44 states have internal predecessors, (7420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 548.0) internal successors, (24660), 45 states have internal predecessors, (24660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,334 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 548.0) internal successors, (24660), 45 states have internal predecessors, (24660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:30,334 INFO L175 Difference]: Start difference. First operand has 279 places, 663 transitions, 15472 flow. Second operand 44 states and 7420 transitions. [2023-11-17 15:57:30,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1419 transitions, 34383 flow [2023-11-17 15:57:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1419 transitions, 33598 flow, removed 112 selfloop flow, removed 17 redundant places. [2023-11-17 15:57:34,282 INFO L231 Difference]: Finished difference. Result has 320 places, 882 transitions, 21555 flow [2023-11-17 15:57:34,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=14857, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21555, PETRI_PLACES=320, PETRI_TRANSITIONS=882} [2023-11-17 15:57:34,283 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2023-11-17 15:57:34,283 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 882 transitions, 21555 flow [2023-11-17 15:57:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 164.4418604651163) internal successors, (7071), 43 states have internal predecessors, (7071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:34,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-17 15:57:34,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-17 15:57:34,490 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:34,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1050238884, now seen corresponding path program 13 times [2023-11-17 15:57:34,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:34,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776686636] [2023-11-17 15:57:34,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:34,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776686636] [2023-11-17 15:57:34,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776686636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672391224] [2023-11-17 15:57:34,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:57:34,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:34,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:34,825 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:34,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 15:57:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:35,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 15:57:35,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:35,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:35,439 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2023-11-17 15:57:35,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 95 [2023-11-17 15:57:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:35,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672391224] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:35,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:35,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-11-17 15:57:35,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65150390] [2023-11-17 15:57:35,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:35,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 15:57:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 15:57:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 15:57:35,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:57:35,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 882 transitions, 21555 flow. Second operand has 40 states, 40 states have (on average 173.55) internal successors, (6942), 40 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:35,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:57:35,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:40,591 INFO L124 PetriNetUnfolderBase]: 7433/12604 cut-off events. [2023-11-17 15:57:40,591 INFO L125 PetriNetUnfolderBase]: For 440867/440867 co-relation queries the response was YES. [2023-11-17 15:57:40,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133089 conditions, 12604 events. 7433/12604 cut-off events. For 440867/440867 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 93843 event pairs, 1531 based on Foata normal form. 18/12622 useless extension candidates. Maximal degree in co-relation 132980. Up to 6551 conditions per place. [2023-11-17 15:57:40,736 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 544 selfloop transitions, 515 changer transitions 0/1059 dead transitions. [2023-11-17 15:57:40,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1059 transitions, 27059 flow [2023-11-17 15:57:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 15:57:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 15:57:40,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3722 transitions. [2023-11-17 15:57:40,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32342718109141466 [2023-11-17 15:57:40,849 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3722 transitions. [2023-11-17 15:57:40,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3722 transitions. [2023-11-17 15:57:40,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:40,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3722 transitions. [2023-11-17 15:57:40,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 177.23809523809524) internal successors, (3722), 21 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 548.0) internal successors, (12056), 22 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,857 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 548.0) internal successors, (12056), 22 states have internal predecessors, (12056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:40,857 INFO L175 Difference]: Start difference. First operand has 320 places, 882 transitions, 21555 flow. Second operand 21 states and 3722 transitions. [2023-11-17 15:57:40,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1059 transitions, 27059 flow [2023-11-17 15:57:45,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1059 transitions, 26401 flow, removed 292 selfloop flow, removed 7 redundant places. [2023-11-17 15:57:45,348 INFO L231 Difference]: Finished difference. Result has 338 places, 970 transitions, 24369 flow [2023-11-17 15:57:45,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=21010, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24369, PETRI_PLACES=338, PETRI_TRANSITIONS=970} [2023-11-17 15:57:45,349 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 313 predicate places. [2023-11-17 15:57:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 970 transitions, 24369 flow [2023-11-17 15:57:45,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 173.55) internal successors, (6942), 40 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:45,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:45,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:45,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-17 15:57:45,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-17 15:57:45,556 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:45,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1972381852, now seen corresponding path program 14 times [2023-11-17 15:57:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144094486] [2023-11-17 15:57:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:45,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144094486] [2023-11-17 15:57:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144094486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658570208] [2023-11-17 15:57:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:57:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:45,915 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:45,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-17 15:57:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:57:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:46,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 15:57:46,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:46,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:57:46,609 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:46,609 INFO L378 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 20 treesize of output 4 [2023-11-17 15:57:46,646 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2023-11-17 15:57:46,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 66 [2023-11-17 15:57:46,671 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-17 15:57:46,671 INFO L378 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 20 treesize of output 4 [2023-11-17 15:57:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658570208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:57:46,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:57:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 39 [2023-11-17 15:57:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384913725] [2023-11-17 15:57:46,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:57:46,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 15:57:46,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:57:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 15:57:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2023-11-17 15:57:46,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:57:46,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 970 transitions, 24369 flow. Second operand has 40 states, 40 states have (on average 173.65) internal successors, (6946), 40 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:46,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:57:46,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:57:46,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:57:52,285 INFO L124 PetriNetUnfolderBase]: 7835/13420 cut-off events. [2023-11-17 15:57:52,285 INFO L125 PetriNetUnfolderBase]: For 528792/528792 co-relation queries the response was YES. [2023-11-17 15:57:52,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145332 conditions, 13420 events. 7835/13420 cut-off events. For 528792/528792 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 102217 event pairs, 1703 based on Foata normal form. 150/13570 useless extension candidates. Maximal degree in co-relation 145219. Up to 7101 conditions per place. [2023-11-17 15:57:52,470 INFO L140 encePairwiseOnDemand]: 536/548 looper letters, 707 selfloop transitions, 414 changer transitions 0/1121 dead transitions. [2023-11-17 15:57:52,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1121 transitions, 29360 flow [2023-11-17 15:57:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 15:57:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 15:57:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3384 transitions. [2023-11-17 15:57:52,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32500960430272763 [2023-11-17 15:57:52,473 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3384 transitions. [2023-11-17 15:57:52,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3384 transitions. [2023-11-17 15:57:52,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:57:52,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3384 transitions. [2023-11-17 15:57:52,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 178.10526315789474) internal successors, (3384), 19 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:52,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 548.0) internal successors, (10960), 20 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:52,480 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 548.0) internal successors, (10960), 20 states have internal predecessors, (10960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:52,480 INFO L175 Difference]: Start difference. First operand has 338 places, 970 transitions, 24369 flow. Second operand 19 states and 3384 transitions. [2023-11-17 15:57:52,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1121 transitions, 29360 flow [2023-11-17 15:57:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1121 transitions, 28624 flow, removed 185 selfloop flow, removed 11 redundant places. [2023-11-17 15:57:58,445 INFO L231 Difference]: Finished difference. Result has 348 places, 1007 transitions, 25715 flow [2023-11-17 15:57:58,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=23752, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25715, PETRI_PLACES=348, PETRI_TRANSITIONS=1007} [2023-11-17 15:57:58,446 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2023-11-17 15:57:58,446 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1007 transitions, 25715 flow [2023-11-17 15:57:58,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 173.65) internal successors, (6946), 40 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:57:58,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:57:58,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:57:58,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-17 15:57:58,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:58,652 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:57:58,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:57:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -252562188, now seen corresponding path program 15 times [2023-11-17 15:57:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:57:58,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81178766] [2023-11-17 15:57:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:57:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:57:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:57:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:59,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:57:59,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81178766] [2023-11-17 15:57:59,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81178766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:57:59,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855515938] [2023-11-17 15:57:59,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:57:59,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:57:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:57:59,132 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:57:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-17 15:57:59,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 15:57:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:57:59,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 15:57:59,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:57:59,470 INFO L378 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 15 treesize of output 1 [2023-11-17 15:57:59,497 INFO L378 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 8 treesize of output 1 [2023-11-17 15:57:59,522 INFO L378 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 8 treesize of output 1 [2023-11-17 15:57:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:57:59,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:00,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,289 INFO L378 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 52 treesize of output 41 [2023-11-17 15:58:00,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,296 INFO L378 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 726 treesize of output 642 [2023-11-17 15:58:00,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,305 INFO L378 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 310 treesize of output 287 [2023-11-17 15:58:00,326 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,326 INFO L378 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 278 treesize of output 223 [2023-11-17 15:58:00,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,374 INFO L378 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 52 treesize of output 41 [2023-11-17 15:58:00,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,381 INFO L378 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 726 treesize of output 642 [2023-11-17 15:58:00,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,392 INFO L378 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 310 treesize of output 287 [2023-11-17 15:58:00,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 15:58:00,400 INFO L378 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 278 treesize of output 223 [2023-11-17 15:58:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855515938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:00,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:00,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-11-17 15:58:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245831047] [2023-11-17 15:58:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:00,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 15:58:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:00,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 15:58:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1542, Unknown=24, NotChecked=0, Total=1806 [2023-11-17 15:58:00,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 548 [2023-11-17 15:58:00,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1007 transitions, 25715 flow. Second operand has 43 states, 43 states have (on average 164.53488372093022) internal successors, (7075), 43 states have internal predecessors, (7075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:00,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:00,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 548 [2023-11-17 15:58:00,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:09,125 INFO L124 PetriNetUnfolderBase]: 9670/16599 cut-off events. [2023-11-17 15:58:09,126 INFO L125 PetriNetUnfolderBase]: For 625907/625907 co-relation queries the response was YES. [2023-11-17 15:58:09,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178443 conditions, 16599 events. 9670/16599 cut-off events. For 625907/625907 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 130566 event pairs, 1076 based on Foata normal form. 230/16829 useless extension candidates. Maximal degree in co-relation 178327. Up to 7885 conditions per place. [2023-11-17 15:58:09,312 INFO L140 encePairwiseOnDemand]: 533/548 looper letters, 801 selfloop transitions, 987 changer transitions 1/1789 dead transitions. [2023-11-17 15:58:09,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1789 transitions, 45113 flow [2023-11-17 15:58:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 15:58:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 15:58:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 7786 transitions. [2023-11-17 15:58:09,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3088701999365281 [2023-11-17 15:58:09,317 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 7786 transitions. [2023-11-17 15:58:09,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 7786 transitions. [2023-11-17 15:58:09,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:09,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 7786 transitions. [2023-11-17 15:58:09,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 169.2608695652174) internal successors, (7786), 46 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:09,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 548.0) internal successors, (25756), 47 states have internal predecessors, (25756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:09,332 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 548.0) internal successors, (25756), 47 states have internal predecessors, (25756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:09,333 INFO L175 Difference]: Start difference. First operand has 348 places, 1007 transitions, 25715 flow. Second operand 46 states and 7786 transitions. [2023-11-17 15:58:09,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1789 transitions, 45113 flow [2023-11-17 15:58:17,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1789 transitions, 44368 flow, removed 67 selfloop flow, removed 13 redundant places. [2023-11-17 15:58:17,094 INFO L231 Difference]: Finished difference. Result has 404 places, 1425 transitions, 39230 flow [2023-11-17 15:58:17,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=25159, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=39230, PETRI_PLACES=404, PETRI_TRANSITIONS=1425} [2023-11-17 15:58:17,094 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 379 predicate places. [2023-11-17 15:58:17,094 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1425 transitions, 39230 flow [2023-11-17 15:58:17,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 164.53488372093022) internal successors, (7075), 43 states have internal predecessors, (7075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:17,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:17,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:17,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-17 15:58:17,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:17,301 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:17,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:17,301 INFO L85 PathProgramCache]: Analyzing trace with hash -538677700, now seen corresponding path program 16 times [2023-11-17 15:58:17,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:17,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147712110] [2023-11-17 15:58:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:17,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147712110] [2023-11-17 15:58:17,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147712110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:17,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125108683] [2023-11-17 15:58:17,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:58:17,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:17,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:17,706 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:17,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-17 15:58:17,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:58:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:17,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 15:58:17,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 15:58:18,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:18,289 INFO L349 Elim1Store]: treesize reduction 13, result has 93.8 percent of original size [2023-11-17 15:58:18,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 230 [2023-11-17 15:58:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:58:28,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125108683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:28,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:28,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 31 [2023-11-17 15:58:28,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424896120] [2023-11-17 15:58:28,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:28,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 15:58:28,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:28,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 15:58:28,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2023-11-17 15:58:28,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:58:28,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1425 transitions, 39230 flow. Second operand has 31 states, 31 states have (on average 173.90322580645162) internal successors, (5391), 31 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:28,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:28,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:58:28,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:58:38,452 INFO L124 PetriNetUnfolderBase]: 11104/19041 cut-off events. [2023-11-17 15:58:38,452 INFO L125 PetriNetUnfolderBase]: For 962737/962737 co-relation queries the response was YES. [2023-11-17 15:58:38,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228745 conditions, 19041 events. 11104/19041 cut-off events. For 962737/962737 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 152006 event pairs, 2002 based on Foata normal form. 60/19101 useless extension candidates. Maximal degree in co-relation 228605. Up to 9305 conditions per place. [2023-11-17 15:58:38,708 INFO L140 encePairwiseOnDemand]: 534/548 looper letters, 1032 selfloop transitions, 935 changer transitions 1/1968 dead transitions. [2023-11-17 15:58:38,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1968 transitions, 54304 flow [2023-11-17 15:58:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-17 15:58:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-17 15:58:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8729 transitions. [2023-11-17 15:58:38,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3250782064650678 [2023-11-17 15:58:38,713 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8729 transitions. [2023-11-17 15:58:38,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8729 transitions. [2023-11-17 15:58:38,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:58:38,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8729 transitions. [2023-11-17 15:58:38,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 178.14285714285714) internal successors, (8729), 49 states have internal predecessors, (8729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 548.0) internal successors, (27400), 50 states have internal predecessors, (27400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,730 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 548.0) internal successors, (27400), 50 states have internal predecessors, (27400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:38,730 INFO L175 Difference]: Start difference. First operand has 404 places, 1425 transitions, 39230 flow. Second operand 49 states and 8729 transitions. [2023-11-17 15:58:38,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1968 transitions, 54304 flow [2023-11-17 15:58:53,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1968 transitions, 52505 flow, removed 754 selfloop flow, removed 12 redundant places. [2023-11-17 15:58:53,269 INFO L231 Difference]: Finished difference. Result has 457 places, 1573 transitions, 43685 flow [2023-11-17 15:58:53,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=37596, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=791, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=43685, PETRI_PLACES=457, PETRI_TRANSITIONS=1573} [2023-11-17 15:58:53,270 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 432 predicate places. [2023-11-17 15:58:53,270 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1573 transitions, 43685 flow [2023-11-17 15:58:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 173.90322580645162) internal successors, (5391), 31 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:53,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:58:53,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:58:53,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-17 15:58:53,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:53,476 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:58:53,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:58:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1396500330, now seen corresponding path program 17 times [2023-11-17 15:58:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:58:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036085021] [2023-11-17 15:58:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:58:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:58:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:58:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:58:53,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:58:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036085021] [2023-11-17 15:58:53,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036085021] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:58:53,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620449419] [2023-11-17 15:58:53,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:58:53,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:58:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:58:53,879 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:58:53,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-17 15:58:54,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 15:58:54,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:58:54,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 15:58:54,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:58:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:58:54,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:58:54,593 INFO L349 Elim1Store]: treesize reduction 41, result has 79.0 percent of original size [2023-11-17 15:58:54,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 193 [2023-11-17 15:58:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:58:55,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620449419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:58:55,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:58:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-11-17 15:58:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796712072] [2023-11-17 15:58:55,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:58:55,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 15:58:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:58:55,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 15:58:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2023-11-17 15:58:55,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 548 [2023-11-17 15:58:55,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1573 transitions, 43685 flow. Second operand has 30 states, 30 states have (on average 174.06666666666666) internal successors, (5222), 30 states have internal predecessors, (5222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:58:55,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:58:55,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 548 [2023-11-17 15:58:55,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 15:59:02,210 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:59:02,210 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:59:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 15:59:02,298 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 15:59:02,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-11-17 15:59:02,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:59:02,503 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 172/548 universal loopers) in iteration 73,while PetriNetUnfolder was constructing finite prefix that currently has 135384 conditions, 10789 events (6461/10788 cut-off events. For 584683/584683 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 87001 event pairs, 904 based on Foata normal form. 107/12103 useless extension candidates. Maximal degree in co-relation 135228. Up to 5303 conditions per place.). [2023-11-17 15:59:02,507 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 15:59:02,507 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 15:59:02,507 INFO L445 BasicCegarLoop]: Path program histogram: [21, 17, 14, 12, 2, 2, 1, 1, 1, 1, 1] [2023-11-17 15:59:02,509 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 15:59:02,509 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 15:59:02,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 03:59:02 BasicIcfg [2023-11-17 15:59:02,511 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 15:59:02,512 INFO L158 Benchmark]: Toolchain (without parser) took 539093.65ms. Allocated memory was 235.9MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 190.6MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 3.2GB. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.51ms. Allocated memory is still 235.9MB. Free memory was 190.1MB in the beginning and 178.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.43ms. Allocated memory is still 235.9MB. Free memory was 178.5MB in the beginning and 175.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: Boogie Preprocessor took 22.31ms. Allocated memory is still 235.9MB. Free memory was 175.9MB in the beginning and 174.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: RCFGBuilder took 543.11ms. Allocated memory is still 235.9MB. Free memory was 174.3MB in the beginning and 153.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-11-17 15:59:02,512 INFO L158 Benchmark]: TraceAbstraction took 538284.28ms. Allocated memory was 235.9MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 152.3MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. [2023-11-17 15:59:02,513 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.51ms. Allocated memory is still 235.9MB. Free memory was 190.1MB in the beginning and 178.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 34.43ms. Allocated memory is still 235.9MB. Free memory was 178.5MB in the beginning and 175.9MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.31ms. Allocated memory is still 235.9MB. Free memory was 175.9MB in the beginning and 174.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 543.11ms. Allocated memory is still 235.9MB. Free memory was 174.3MB in the beginning and 153.4MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 538284.28ms. Allocated memory was 235.9MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 152.3MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 3.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.3s, 237 PlacesBefore, 25 PlacesAfterwards, 251 TransitionsBefore, 23 TransitionsAfterwards, 6732 CoEnabledTransitionPairs, 7 FixpointIterations, 125 TrivialSequentialCompositions, 93 ConcurrentSequentialCompositions, 27 TrivialYvCompositions, 25 ConcurrentYvCompositions, 16 ChoiceCompositions, 286 TotalNumberOfCompositions, 6625 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6196, independent: 6125, independent conditional: 0, independent unconditional: 6125, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5066, independent: 5037, independent conditional: 0, independent unconditional: 5037, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5066, independent: 5037, independent conditional: 0, independent unconditional: 5037, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 29, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 69, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 69, dependent conditional: 0, dependent unconditional: 69, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6196, independent: 1088, independent conditional: 0, independent unconditional: 1088, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 5066, unknown conditional: 0, unknown unconditional: 5066] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 60, Positive conditional cache size: 0, Positive unconditional cache size: 60, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 172/548 universal loopers) in iteration 73,while PetriNetUnfolder was constructing finite prefix that currently has 135384 conditions, 10789 events (6461/10788 cut-off events. For 584683/584683 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 87001 event pairs, 904 based on Foata normal form. 107/12103 useless extension candidates. Maximal degree in co-relation 135228. Up to 5303 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 172/548 universal loopers) in iteration 73,while PetriNetUnfolder was constructing finite prefix that currently has 135384 conditions, 10789 events (6461/10788 cut-off events. For 584683/584683 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 87001 event pairs, 904 based on Foata normal form. 107/12103 useless extension candidates. Maximal degree in co-relation 135228. Up to 5303 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (30states, 172/548 universal loopers) in iteration 73,while PetriNetUnfolder was constructing finite prefix that currently has 135384 conditions, 10789 events (6461/10788 cut-off events. For 584683/584683 co-relation queries the response was YES. Maximal size of possible extension queue 1325. Compared 87001 event pairs, 904 based on Foata normal form. 107/12103 useless extension candidates. Maximal degree in co-relation 135228. Up to 5303 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 338 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 538.2s, OverallIterations: 73, TraceHistogramMax: 2, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 417.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.4s, HoareTripleCheckerStatistics: 42 mSolverCounterUnknown, 9212 SdHoareTripleChecker+Valid, 25.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9212 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 22.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 313 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 542 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 46639 IncrementalHoareTripleChecker+Invalid, 47536 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 542 mSolverCounterUnsat, 0 mSDtfsCounter, 46639 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3540 GetRequests, 1330 SyntacticMatches, 15 SemanticMatches, 2195 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 19062 ImplicationChecksByTransitivity, 44.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43685occurred in iteration=72, InterpolantAutomatonStates: 1085, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 90.9s InterpolantComputationTime, 2758 NumberOfCodeBlocks, 2724 NumberOfCodeBlocksAsserted, 176 NumberOfCheckSat, 3470 ConstructedInterpolants, 126 QuantifiedInterpolants, 59231 SizeOfPredicates, 1177 NumberOfNonLiveVariables, 12971 ConjunctsInSsa, 1810 ConjunctsInUnsatCore, 179 InterpolantComputations, 40 PerfectInterpolantSequences, 304/753 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown