/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:00:26,788 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:00:26,871 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 08:00:26,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:00:26,876 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:00:26,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:00:26,906 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:00:26,906 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:00:26,907 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:00:26,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:00:26,910 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:00:26,910 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:00:26,911 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:00:26,912 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:00:26,912 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:00:26,912 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:00:26,913 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:00:26,913 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:00:26,913 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:00:26,913 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:00:26,913 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:00:26,914 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:00:26,915 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:00:26,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:00:26,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:00:26,915 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:00:26,916 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:00:26,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:00:26,916 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:00:26,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:00:26,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:00:26,918 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:00:26,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:00:26,918 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:00:26,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:00:26,918 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:00:27,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:00:27,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:00:27,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:00:27,244 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:00:27,246 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:00:27,247 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-24 08:00:28,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:00:28,579 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:00:28,580 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-08-24 08:00:28,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e62e99a/8b4d45ed4f5949029ba185bf86213ce5/FLAGa30b3797b [2023-08-24 08:00:28,599 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e62e99a/8b4d45ed4f5949029ba185bf86213ce5 [2023-08-24 08:00:28,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:00:28,602 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:00:28,603 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:00:28,603 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:00:28,606 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:00:28,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,607 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337f96b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28, skipping insertion in model container [2023-08-24 08:00:28,607 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,624 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:00:28,747 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/fibonacci.wvr.c[2330,2343] [2023-08-24 08:00:28,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:00:28,759 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:00:28,776 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/fibonacci.wvr.c[2330,2343] [2023-08-24 08:00:28,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:00:28,791 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:00:28,791 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28 WrapperNode [2023-08-24 08:00:28,791 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:00:28,792 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:00:28,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:00:28,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:00:28,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,822 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 171 [2023-08-24 08:00:28,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:00:28,823 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:00:28,823 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:00:28,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:00:28,830 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,840 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,848 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,861 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,863 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:00:28,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:00:28,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:00:28,864 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:00:28,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (1/1) ... [2023-08-24 08:00:28,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:00:28,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:28,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 08:00:28,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 08:00:28,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:00:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:00:28,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:00:28,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:00:28,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:00:28,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:00:28,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:00:28,950 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 08:00:29,062 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:00:29,063 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:00:29,361 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:00:29,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:00:29,369 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 08:00:29,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:00:29 BoogieIcfgContainer [2023-08-24 08:00:29,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:00:29,373 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:00:29,373 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:00:29,375 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:00:29,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:00:28" (1/3) ... [2023-08-24 08:00:29,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc2d208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:00:29, skipping insertion in model container [2023-08-24 08:00:29,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:00:28" (2/3) ... [2023-08-24 08:00:29,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc2d208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:00:29, skipping insertion in model container [2023-08-24 08:00:29,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:00:29" (3/3) ... [2023-08-24 08:00:29,386 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-08-24 08:00:29,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:00:29,400 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:00:29,400 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:00:29,496 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:00:29,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 198 transitions, 412 flow [2023-08-24 08:00:29,616 INFO L124 PetriNetUnfolderBase]: 14/196 cut-off events. [2023-08-24 08:00:29,616 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:00:29,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 196 events. 14/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 300 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-08-24 08:00:29,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 198 transitions, 412 flow [2023-08-24 08:00:29,626 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 188 transitions, 388 flow [2023-08-24 08:00:29,629 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:00:29,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 188 transitions, 388 flow [2023-08-24 08:00:29,639 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 188 transitions, 388 flow [2023-08-24 08:00:29,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 188 transitions, 388 flow [2023-08-24 08:00:29,677 INFO L124 PetriNetUnfolderBase]: 14/188 cut-off events. [2023-08-24 08:00:29,677 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:00:29,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 14/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 262 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-08-24 08:00:29,682 INFO L119 LiptonReduction]: Number of co-enabled transitions 7700 [2023-08-24 08:00:35,029 INFO L134 LiptonReduction]: Checked pairs total: 6419 [2023-08-24 08:00:35,029 INFO L136 LiptonReduction]: Total number of compositions: 213 [2023-08-24 08:00:35,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:00:35,057 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@450296d8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:00:35,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:00:35,065 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:00:35,065 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 08:00:35,065 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:00:35,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:35,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:35,066 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:35,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:35,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1766508746, now seen corresponding path program 1 times [2023-08-24 08:00:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353775236] [2023-08-24 08:00:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:35,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:35,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:35,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353775236] [2023-08-24 08:00:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353775236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:35,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:35,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:00:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503150447] [2023-08-24 08:00:35,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:35,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:35,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 411 [2023-08-24 08:00:35,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:35,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:35,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 411 [2023-08-24 08:00:35,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:35,851 INFO L124 PetriNetUnfolderBase]: 64/119 cut-off events. [2023-08-24 08:00:35,851 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-24 08:00:35,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 337 event pairs, 3 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2023-08-24 08:00:35,856 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2023-08-24 08:00:35,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2023-08-24 08:00:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 849 transitions. [2023-08-24 08:00:35,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131386861313869 [2023-08-24 08:00:35,876 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 849 transitions. [2023-08-24 08:00:35,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 849 transitions. [2023-08-24 08:00:35,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:35,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 849 transitions. [2023-08-24 08:00:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:35,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:35,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:35,896 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 849 transitions. [2023-08-24 08:00:35,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2023-08-24 08:00:35,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:35,901 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-08-24 08:00:35,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-24 08:00:35,905 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 08:00:35,905 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-08-24 08:00:35,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:35,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:35,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:00:35,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:35,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1970694460, now seen corresponding path program 2 times [2023-08-24 08:00:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878569048] [2023-08-24 08:00:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:36,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:36,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878569048] [2023-08-24 08:00:36,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878569048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:36,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:36,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 08:00:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596105519] [2023-08-24 08:00:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:36,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:36,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:36,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:36,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:36,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 411 [2023-08-24 08:00:36,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:36,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 411 [2023-08-24 08:00:36,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:36,231 INFO L124 PetriNetUnfolderBase]: 63/111 cut-off events. [2023-08-24 08:00:36,232 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-24 08:00:36,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 287 event pairs, 1 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2023-08-24 08:00:36,233 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2023-08-24 08:00:36,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2023-08-24 08:00:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:36,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 847 transitions. [2023-08-24 08:00:36,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121654501216545 [2023-08-24 08:00:36,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 847 transitions. [2023-08-24 08:00:36,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 847 transitions. [2023-08-24 08:00:36,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:36,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 847 transitions. [2023-08-24 08:00:36,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.4) internal successors, (847), 5 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,244 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,244 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 847 transitions. [2023-08-24 08:00:36,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2023-08-24 08:00:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 08:00:36,246 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-08-24 08:00:36,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-24 08:00:36,247 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-08-24 08:00:36,247 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-08-24 08:00:36,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:36,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:00:36,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:36,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1537310143, now seen corresponding path program 1 times [2023-08-24 08:00:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:36,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206451941] [2023-08-24 08:00:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:36,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:36,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206451941] [2023-08-24 08:00:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206451941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:36,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:36,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207539275] [2023-08-24 08:00:36,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:36,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:36,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:36,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:36,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:36,402 INFO L124 PetriNetUnfolderBase]: 89/156 cut-off events. [2023-08-24 08:00:36,402 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-24 08:00:36,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 156 events. 89/156 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 445 event pairs, 28 based on Foata normal form. 4/146 useless extension candidates. Maximal degree in co-relation 498. Up to 116 conditions per place. [2023-08-24 08:00:36,404 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 25 selfloop transitions, 10 changer transitions 4/39 dead transitions. [2023-08-24 08:00:36,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 262 flow [2023-08-24 08:00:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:36,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-08-24 08:00:36,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218978102189781 [2023-08-24 08:00:36,407 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:36,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,414 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 867 transitions. [2023-08-24 08:00:36,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 262 flow [2023-08-24 08:00:36,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-24 08:00:36,419 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-08-24 08:00:36,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-08-24 08:00:36,420 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 11 predicate places. [2023-08-24 08:00:36,423 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-08-24 08:00:36,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:36,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:36,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:00:36,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:36,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:36,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1418363699, now seen corresponding path program 2 times [2023-08-24 08:00:36,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:36,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143771143] [2023-08-24 08:00:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:36,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:36,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143771143] [2023-08-24 08:00:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143771143] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:36,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:36,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030054924] [2023-08-24 08:00:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:36,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:36,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:36,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:36,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:36,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:36,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:36,570 INFO L124 PetriNetUnfolderBase]: 103/184 cut-off events. [2023-08-24 08:00:36,570 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-08-24 08:00:36,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 184 events. 103/184 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 550 event pairs, 32 based on Foata normal form. 4/168 useless extension candidates. Maximal degree in co-relation 459. Up to 106 conditions per place. [2023-08-24 08:00:36,573 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 36 selfloop transitions, 8 changer transitions 6/50 dead transitions. [2023-08-24 08:00:36,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 359 flow [2023-08-24 08:00:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 872 transitions. [2023-08-24 08:00:36,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424330900243309 [2023-08-24 08:00:36,576 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 872 transitions. [2023-08-24 08:00:36,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 872 transitions. [2023-08-24 08:00:36,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:36,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 872 transitions. [2023-08-24 08:00:36,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.4) internal successors, (872), 5 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,584 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 5 states and 872 transitions. [2023-08-24 08:00:36,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 359 flow [2023-08-24 08:00:36,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 333 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 08:00:36,590 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 187 flow [2023-08-24 08:00:36,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-24 08:00:36,591 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-08-24 08:00:36,591 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 187 flow [2023-08-24 08:00:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:36,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:00:36,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:36,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2009708737, now seen corresponding path program 3 times [2023-08-24 08:00:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:36,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867392401] [2023-08-24 08:00:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:36,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:36,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867392401] [2023-08-24 08:00:36,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867392401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:36,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:36,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:36,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223737281] [2023-08-24 08:00:36,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:36,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:36,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:36,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:36,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:36,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:36,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:36,744 INFO L124 PetriNetUnfolderBase]: 96/173 cut-off events. [2023-08-24 08:00:36,750 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-08-24 08:00:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 173 events. 96/173 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 506 event pairs, 37 based on Foata normal form. 4/163 useless extension candidates. Maximal degree in co-relation 672. Up to 135 conditions per place. [2023-08-24 08:00:36,751 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 26 selfloop transitions, 11 changer transitions 5/42 dead transitions. [2023-08-24 08:00:36,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 339 flow [2023-08-24 08:00:36,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2023-08-24 08:00:36,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218978102189781 [2023-08-24 08:00:36,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:36,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2023-08-24 08:00:36,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,766 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,766 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 187 flow. Second operand 5 states and 867 transitions. [2023-08-24 08:00:36,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 339 flow [2023-08-24 08:00:36,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 324 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 08:00:36,769 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 226 flow [2023-08-24 08:00:36,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-24 08:00:36,771 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-08-24 08:00:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 226 flow [2023-08-24 08:00:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:36,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:36,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:36,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 08:00:36,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:36,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash 214798382, now seen corresponding path program 1 times [2023-08-24 08:00:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:36,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380956759] [2023-08-24 08:00:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:36,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:36,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380956759] [2023-08-24 08:00:36,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380956759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:36,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189105431] [2023-08-24 08:00:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:36,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:36,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 08:00:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:36,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:00:36,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189105431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:37,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:37,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 08:00:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124178589] [2023-08-24 08:00:37,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:37,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:00:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:37,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:00:37,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:00:37,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:37,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 169.75) internal successors, (1358), 8 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:37,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:37,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:37,178 INFO L124 PetriNetUnfolderBase]: 100/173 cut-off events. [2023-08-24 08:00:37,179 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-08-24 08:00:37,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 173 events. 100/173 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 488 event pairs, 10 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 695. Up to 67 conditions per place. [2023-08-24 08:00:37,180 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 48 selfloop transitions, 14 changer transitions 0/62 dead transitions. [2023-08-24 08:00:37,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 472 flow [2023-08-24 08:00:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1218 transitions. [2023-08-24 08:00:37,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233576642335766 [2023-08-24 08:00:37,184 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1218 transitions. [2023-08-24 08:00:37,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1218 transitions. [2023-08-24 08:00:37,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:37,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1218 transitions. [2023-08-24 08:00:37,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:37,192 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:37,192 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 226 flow. Second operand 7 states and 1218 transitions. [2023-08-24 08:00:37,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 472 flow [2023-08-24 08:00:37,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 62 transitions, 429 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-24 08:00:37,195 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 257 flow [2023-08-24 08:00:37,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2023-08-24 08:00:37,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-08-24 08:00:37,196 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 257 flow [2023-08-24 08:00:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.75) internal successors, (1358), 8 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:37,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:37,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 08:00:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 08:00:37,403 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:37,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash -614149918, now seen corresponding path program 2 times [2023-08-24 08:00:37,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:37,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873882232] [2023-08-24 08:00:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:37,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873882232] [2023-08-24 08:00:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873882232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:37,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:37,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392845350] [2023-08-24 08:00:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:37,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:37,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:37,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:37,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:37,581 INFO L124 PetriNetUnfolderBase]: 101/184 cut-off events. [2023-08-24 08:00:37,581 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-24 08:00:37,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 184 events. 101/184 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 531 event pairs, 29 based on Foata normal form. 2/172 useless extension candidates. Maximal degree in co-relation 766. Up to 121 conditions per place. [2023-08-24 08:00:37,583 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 34 selfloop transitions, 13 changer transitions 3/50 dead transitions. [2023-08-24 08:00:37,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 415 flow [2023-08-24 08:00:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 868 transitions. [2023-08-24 08:00:37,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42238442822384425 [2023-08-24 08:00:37,585 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 868 transitions. [2023-08-24 08:00:37,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 868 transitions. [2023-08-24 08:00:37,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:37,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 868 transitions. [2023-08-24 08:00:37,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,593 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 257 flow. Second operand 5 states and 868 transitions. [2023-08-24 08:00:37,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 415 flow [2023-08-24 08:00:37,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 377 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-24 08:00:37,596 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 249 flow [2023-08-24 08:00:37,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-24 08:00:37,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-08-24 08:00:37,597 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 249 flow [2023-08-24 08:00:37,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:37,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:37,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 08:00:37,598 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:37,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1772049871, now seen corresponding path program 4 times [2023-08-24 08:00:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313254050] [2023-08-24 08:00:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:37,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:37,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313254050] [2023-08-24 08:00:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313254050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:37,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336428257] [2023-08-24 08:00:37,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:00:37,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:37,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:37,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:37,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 08:00:37,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:00:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:37,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:00:37,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:37,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336428257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:37,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:37,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-24 08:00:37,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480455765] [2023-08-24 08:00:37,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:37,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:00:37,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:00:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:00:37,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:37,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 249 flow. Second operand has 8 states, 8 states have (on average 169.75) internal successors, (1358), 8 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:37,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:37,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:37,909 INFO L124 PetriNetUnfolderBase]: 105/188 cut-off events. [2023-08-24 08:00:37,909 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2023-08-24 08:00:37,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 188 events. 105/188 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 539 event pairs, 12 based on Foata normal form. 4/176 useless extension candidates. Maximal degree in co-relation 768. Up to 67 conditions per place. [2023-08-24 08:00:37,910 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 43 selfloop transitions, 19 changer transitions 0/62 dead transitions. [2023-08-24 08:00:37,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 492 flow [2023-08-24 08:00:37,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1214 transitions. [2023-08-24 08:00:37,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219673270768161 [2023-08-24 08:00:37,914 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1214 transitions. [2023-08-24 08:00:37,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1214 transitions. [2023-08-24 08:00:37,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:37,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1214 transitions. [2023-08-24 08:00:37,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.42857142857142) internal successors, (1214), 7 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:37,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:37,922 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 249 flow. Second operand 7 states and 1214 transitions. [2023-08-24 08:00:37,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 492 flow [2023-08-24 08:00:37,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 458 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:37,925 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 303 flow [2023-08-24 08:00:37,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-24 08:00:37,926 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-08-24 08:00:37,926 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 303 flow [2023-08-24 08:00:37,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 169.75) internal successors, (1358), 8 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:37,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:37,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:37,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:38,132 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,SelfDestructingSolverStorable7 [2023-08-24 08:00:38,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:38,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 986668656, now seen corresponding path program 3 times [2023-08-24 08:00:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471746325] [2023-08-24 08:00:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:38,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471746325] [2023-08-24 08:00:38,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471746325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:38,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:38,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:38,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553093634] [2023-08-24 08:00:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:38,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:38,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:38,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:38,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:38,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:38,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:38,260 INFO L124 PetriNetUnfolderBase]: 113/202 cut-off events. [2023-08-24 08:00:38,260 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2023-08-24 08:00:38,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 202 events. 113/202 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 592 event pairs, 29 based on Foata normal form. 6/208 useless extension candidates. Maximal degree in co-relation 878. Up to 155 conditions per place. [2023-08-24 08:00:38,262 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 36 selfloop transitions, 16 changer transitions 0/52 dead transitions. [2023-08-24 08:00:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 459 flow [2023-08-24 08:00:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2023-08-24 08:00:38,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42287104622871047 [2023-08-24 08:00:38,266 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2023-08-24 08:00:38,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2023-08-24 08:00:38,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:38,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2023-08-24 08:00:38,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,272 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,272 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 303 flow. Second operand 5 states and 869 transitions. [2023-08-24 08:00:38,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 459 flow [2023-08-24 08:00:38,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 437 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 08:00:38,277 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 329 flow [2023-08-24 08:00:38,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=329, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-24 08:00:38,278 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-08-24 08:00:38,278 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 329 flow [2023-08-24 08:00:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:38,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 08:00:38,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:38,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:38,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1125282720, now seen corresponding path program 4 times [2023-08-24 08:00:38,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:38,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388095560] [2023-08-24 08:00:38,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:38,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388095560] [2023-08-24 08:00:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388095560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:38,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:38,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:38,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175325073] [2023-08-24 08:00:38,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:38,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:38,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:38,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:38,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:38,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:38,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:38,412 INFO L124 PetriNetUnfolderBase]: 112/203 cut-off events. [2023-08-24 08:00:38,412 INFO L125 PetriNetUnfolderBase]: For 546/546 co-relation queries the response was YES. [2023-08-24 08:00:38,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 940 conditions, 203 events. 112/203 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 609 event pairs, 35 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 922. Up to 165 conditions per place. [2023-08-24 08:00:38,414 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 32 selfloop transitions, 14 changer transitions 2/48 dead transitions. [2023-08-24 08:00:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 450 flow [2023-08-24 08:00:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 864 transitions. [2023-08-24 08:00:38,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42043795620437957 [2023-08-24 08:00:38,417 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 864 transitions. [2023-08-24 08:00:38,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 864 transitions. [2023-08-24 08:00:38,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:38,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 864 transitions. [2023-08-24 08:00:38,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.8) internal successors, (864), 5 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,423 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 329 flow. Second operand 5 states and 864 transitions. [2023-08-24 08:00:38,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 450 flow [2023-08-24 08:00:38,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 414 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 08:00:38,427 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 309 flow [2023-08-24 08:00:38,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-24 08:00:38,428 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-24 08:00:38,428 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 309 flow [2023-08-24 08:00:38,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:38,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:38,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 08:00:38,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:38,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash -473673873, now seen corresponding path program 5 times [2023-08-24 08:00:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106449492] [2023-08-24 08:00:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:38,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106449492] [2023-08-24 08:00:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106449492] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:38,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:38,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299176523] [2023-08-24 08:00:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:38,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:38,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:38,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:38,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:38,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:38,578 INFO L124 PetriNetUnfolderBase]: 117/210 cut-off events. [2023-08-24 08:00:38,578 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2023-08-24 08:00:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 946 conditions, 210 events. 117/210 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 35 based on Foata normal form. 4/214 useless extension candidates. Maximal degree in co-relation 928. Up to 169 conditions per place. [2023-08-24 08:00:38,580 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 35 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2023-08-24 08:00:38,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 459 flow [2023-08-24 08:00:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 866 transitions. [2023-08-24 08:00:38,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42141119221411194 [2023-08-24 08:00:38,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 866 transitions. [2023-08-24 08:00:38,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 866 transitions. [2023-08-24 08:00:38,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:38,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 866 transitions. [2023-08-24 08:00:38,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.2) internal successors, (866), 5 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,589 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,589 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 309 flow. Second operand 5 states and 866 transitions. [2023-08-24 08:00:38,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 459 flow [2023-08-24 08:00:38,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 429 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 08:00:38,594 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 320 flow [2023-08-24 08:00:38,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-24 08:00:38,595 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-24 08:00:38,595 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 320 flow [2023-08-24 08:00:38,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:38,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:38,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 08:00:38,608 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:38,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1369242178, now seen corresponding path program 5 times [2023-08-24 08:00:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:38,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788655720] [2023-08-24 08:00:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:38,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788655720] [2023-08-24 08:00:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788655720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934072351] [2023-08-24 08:00:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:38,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:38,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:38,664 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:38,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 08:00:38,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:00:38,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:38,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:00:38,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:38,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934072351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:38,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:38,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 08:00:38,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070847164] [2023-08-24 08:00:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:38,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 08:00:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 08:00:38,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:00:38,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:38,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 320 flow. Second operand has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:38,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:38,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:38,932 INFO L124 PetriNetUnfolderBase]: 111/204 cut-off events. [2023-08-24 08:00:38,932 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2023-08-24 08:00:38,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 204 events. 111/204 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 619 event pairs, 34 based on Foata normal form. 6/210 useless extension candidates. Maximal degree in co-relation 874. Up to 162 conditions per place. [2023-08-24 08:00:38,934 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 37 selfloop transitions, 16 changer transitions 0/53 dead transitions. [2023-08-24 08:00:38,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 465 flow [2023-08-24 08:00:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:00:38,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:00:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1038 transitions. [2023-08-24 08:00:38,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209245742092457 [2023-08-24 08:00:38,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1038 transitions. [2023-08-24 08:00:38,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1038 transitions. [2023-08-24 08:00:38,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:38,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1038 transitions. [2023-08-24 08:00:38,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 173.0) internal successors, (1038), 6 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,944 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,944 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 320 flow. Second operand 6 states and 1038 transitions. [2023-08-24 08:00:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 465 flow [2023-08-24 08:00:38,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 429 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 08:00:38,947 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 324 flow [2023-08-24 08:00:38,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2023-08-24 08:00:38,948 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-08-24 08:00:38,948 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 324 flow [2023-08-24 08:00:38,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:38,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:38,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:38,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:39,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:39,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:39,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1186811534, now seen corresponding path program 6 times [2023-08-24 08:00:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416891582] [2023-08-24 08:00:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416891582] [2023-08-24 08:00:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416891582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:00:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:00:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 08:00:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559393906] [2023-08-24 08:00:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:00:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:00:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:00:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:00:39,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:39,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 324 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:39,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:39,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:39,283 INFO L124 PetriNetUnfolderBase]: 107/192 cut-off events. [2023-08-24 08:00:39,283 INFO L125 PetriNetUnfolderBase]: For 449/449 co-relation queries the response was YES. [2023-08-24 08:00:39,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 192 events. 107/192 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 555 event pairs, 31 based on Foata normal form. 2/194 useless extension candidates. Maximal degree in co-relation 840. Up to 147 conditions per place. [2023-08-24 08:00:39,285 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 32 selfloop transitions, 14 changer transitions 2/48 dead transitions. [2023-08-24 08:00:39,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 48 transitions, 439 flow [2023-08-24 08:00:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:00:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:00:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 863 transitions. [2023-08-24 08:00:39,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41995133819951336 [2023-08-24 08:00:39,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 863 transitions. [2023-08-24 08:00:39,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 863 transitions. [2023-08-24 08:00:39,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:39,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 863 transitions. [2023-08-24 08:00:39,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.6) internal successors, (863), 5 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,292 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 411.0) internal successors, (2466), 6 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,292 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 324 flow. Second operand 5 states and 863 transitions. [2023-08-24 08:00:39,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 48 transitions, 439 flow [2023-08-24 08:00:39,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 385 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-24 08:00:39,295 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 283 flow [2023-08-24 08:00:39,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-08-24 08:00:39,295 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 08:00:39,295 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 283 flow [2023-08-24 08:00:39,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:39,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 08:00:39,296 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:39,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2010515807, now seen corresponding path program 6 times [2023-08-24 08:00:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914648909] [2023-08-24 08:00:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914648909] [2023-08-24 08:00:39,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914648909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817513245] [2023-08-24 08:00:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:00:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:39,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:39,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 08:00:39,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:00:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:39,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 08:00:39,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:39,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817513245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:39,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:39,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 08:00:39,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873451055] [2023-08-24 08:00:39,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:39,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 08:00:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:39,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 08:00:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:00:39,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:39,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 283 flow. Second operand has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:39,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:39,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:39,604 INFO L124 PetriNetUnfolderBase]: 102/179 cut-off events. [2023-08-24 08:00:39,604 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-24 08:00:39,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 179 events. 102/179 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 502 event pairs, 14 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 744. Up to 68 conditions per place. [2023-08-24 08:00:39,605 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 39 selfloop transitions, 25 changer transitions 0/64 dead transitions. [2023-08-24 08:00:39,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 513 flow [2023-08-24 08:00:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:00:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:00:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1719 transitions. [2023-08-24 08:00:39,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41824817518248175 [2023-08-24 08:00:39,610 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1719 transitions. [2023-08-24 08:00:39,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1719 transitions. [2023-08-24 08:00:39,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:39,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1719 transitions. [2023-08-24 08:00:39,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.9) internal successors, (1719), 10 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,618 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,618 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 283 flow. Second operand 10 states and 1719 transitions. [2023-08-24 08:00:39,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 513 flow [2023-08-24 08:00:39,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 478 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:39,620 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 341 flow [2023-08-24 08:00:39,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=341, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-24 08:00:39,621 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-24 08:00:39,621 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 341 flow [2023-08-24 08:00:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 169.3) internal successors, (1693), 10 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:39,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:39,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:39,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:39,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:39,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:39,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 278908317, now seen corresponding path program 1 times [2023-08-24 08:00:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:39,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414710919] [2023-08-24 08:00:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:40,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:40,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414710919] [2023-08-24 08:00:40,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414710919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:40,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461940324] [2023-08-24 08:00:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:40,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:40,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:40,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:40,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 08:00:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:40,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:40,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:40,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461940324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:40,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 08:00:40,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926272488] [2023-08-24 08:00:40,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:40,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:00:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:00:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:00:40,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:40,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 341 flow. Second operand has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:40,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:40,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:40,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:40,691 INFO L124 PetriNetUnfolderBase]: 133/245 cut-off events. [2023-08-24 08:00:40,691 INFO L125 PetriNetUnfolderBase]: For 434/448 co-relation queries the response was YES. [2023-08-24 08:00:40,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 245 events. 133/245 cut-off events. For 434/448 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 868 event pairs, 6 based on Foata normal form. 5/244 useless extension candidates. Maximal degree in co-relation 1035. Up to 151 conditions per place. [2023-08-24 08:00:40,693 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 50 selfloop transitions, 17 changer transitions 5/80 dead transitions. [2023-08-24 08:00:40,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 639 flow [2023-08-24 08:00:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1144 transitions. [2023-08-24 08:00:40,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39763642683350714 [2023-08-24 08:00:40,697 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1144 transitions. [2023-08-24 08:00:40,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1144 transitions. [2023-08-24 08:00:40,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:40,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1144 transitions. [2023-08-24 08:00:40,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.42857142857142) internal successors, (1144), 7 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:40,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:40,703 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:40,703 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 341 flow. Second operand 7 states and 1144 transitions. [2023-08-24 08:00:40,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 639 flow [2023-08-24 08:00:40,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 80 transitions, 553 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-24 08:00:40,709 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 395 flow [2023-08-24 08:00:40,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2023-08-24 08:00:40,709 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-08-24 08:00:40,709 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 395 flow [2023-08-24 08:00:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:40,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:40,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 08:00:40,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:40,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash 475125801, now seen corresponding path program 2 times [2023-08-24 08:00:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:40,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233649145] [2023-08-24 08:00:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:40,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233649145] [2023-08-24 08:00:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233649145] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:41,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000978131] [2023-08-24 08:00:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:00:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:41,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:41,256 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:41,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 08:00:41,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:00:41,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:41,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:41,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:41,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:41,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000978131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:41,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:41,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 08:00:41,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229340151] [2023-08-24 08:00:41,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:41,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:41,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:41,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:41,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:41,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 395 flow. Second operand has 12 states, 12 states have (on average 159.5) internal successors, (1914), 12 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:41,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:41,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:41,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:41,756 INFO L124 PetriNetUnfolderBase]: 138/254 cut-off events. [2023-08-24 08:00:41,756 INFO L125 PetriNetUnfolderBase]: For 672/690 co-relation queries the response was YES. [2023-08-24 08:00:41,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 254 events. 138/254 cut-off events. For 672/690 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 905 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1145. Up to 179 conditions per place. [2023-08-24 08:00:41,758 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 48 selfloop transitions, 18 changer transitions 5/79 dead transitions. [2023-08-24 08:00:41,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 636 flow [2023-08-24 08:00:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1139 transitions. [2023-08-24 08:00:41,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958985053875565 [2023-08-24 08:00:41,762 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1139 transitions. [2023-08-24 08:00:41,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1139 transitions. [2023-08-24 08:00:41,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:41,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1139 transitions. [2023-08-24 08:00:41,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:41,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:41,769 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:41,769 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 395 flow. Second operand 7 states and 1139 transitions. [2023-08-24 08:00:41,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 636 flow [2023-08-24 08:00:41,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 586 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-24 08:00:41,774 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 455 flow [2023-08-24 08:00:41,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-08-24 08:00:41,775 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 44 predicate places. [2023-08-24 08:00:41,775 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 455 flow [2023-08-24 08:00:41,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.5) internal successors, (1914), 12 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:41,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:41,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:41,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 08:00:41,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:41,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:41,982 INFO L85 PathProgramCache]: Analyzing trace with hash 982121481, now seen corresponding path program 3 times [2023-08-24 08:00:41,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:41,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852418724] [2023-08-24 08:00:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:42,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852418724] [2023-08-24 08:00:42,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852418724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:42,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257959089] [2023-08-24 08:00:42,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:00:42,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:42,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:42,259 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:42,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 08:00:42,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:00:42,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:42,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:42,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:42,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:42,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257959089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:42,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:42,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 08:00:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609022617] [2023-08-24 08:00:42,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:42,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:00:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:00:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:00:42,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:42,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 455 flow. Second operand has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:42,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:42,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:42,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:42,762 INFO L124 PetriNetUnfolderBase]: 135/245 cut-off events. [2023-08-24 08:00:42,762 INFO L125 PetriNetUnfolderBase]: For 721/749 co-relation queries the response was YES. [2023-08-24 08:00:42,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 245 events. 135/245 cut-off events. For 721/749 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 864 event pairs, 6 based on Foata normal form. 13/252 useless extension candidates. Maximal degree in co-relation 1124. Up to 155 conditions per place. [2023-08-24 08:00:42,764 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 48 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2023-08-24 08:00:42,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 671 flow [2023-08-24 08:00:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1142 transitions. [2023-08-24 08:00:42,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969412582551269 [2023-08-24 08:00:42,767 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1142 transitions. [2023-08-24 08:00:42,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1142 transitions. [2023-08-24 08:00:42,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:42,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1142 transitions. [2023-08-24 08:00:42,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 163.14285714285714) internal successors, (1142), 7 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:42,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:42,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:42,773 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 455 flow. Second operand 7 states and 1142 transitions. [2023-08-24 08:00:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 671 flow [2023-08-24 08:00:42,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 631 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:42,778 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 491 flow [2023-08-24 08:00:42,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-24 08:00:42,778 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-08-24 08:00:42,779 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 491 flow [2023-08-24 08:00:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:42,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:42,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:42,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:42,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:42,985 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:42,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash 71473803, now seen corresponding path program 4 times [2023-08-24 08:00:42,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:42,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175565151] [2023-08-24 08:00:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:42,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:43,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:43,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175565151] [2023-08-24 08:00:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175565151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220476231] [2023-08-24 08:00:43,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:00:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:43,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:43,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 08:00:43,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:00:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:43,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:43,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:43,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220476231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:43,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:43,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-24 08:00:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488489119] [2023-08-24 08:00:43,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:43,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:43,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:43,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:43,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:43,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 491 flow. Second operand has 12 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:43,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:43,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:43,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:43,667 INFO L124 PetriNetUnfolderBase]: 157/285 cut-off events. [2023-08-24 08:00:43,667 INFO L125 PetriNetUnfolderBase]: For 947/961 co-relation queries the response was YES. [2023-08-24 08:00:43,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1329 conditions, 285 events. 157/285 cut-off events. For 947/961 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1073 event pairs, 6 based on Foata normal form. 5/284 useless extension candidates. Maximal degree in co-relation 1306. Up to 230 conditions per place. [2023-08-24 08:00:43,669 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 53 selfloop transitions, 19 changer transitions 5/85 dead transitions. [2023-08-24 08:00:43,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 753 flow [2023-08-24 08:00:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1131 transitions. [2023-08-24 08:00:43,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931178310740355 [2023-08-24 08:00:43,672 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1131 transitions. [2023-08-24 08:00:43,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1131 transitions. [2023-08-24 08:00:43,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:43,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1131 transitions. [2023-08-24 08:00:43,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 161.57142857142858) internal successors, (1131), 7 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:43,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:43,706 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:43,706 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 491 flow. Second operand 7 states and 1131 transitions. [2023-08-24 08:00:43,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 753 flow [2023-08-24 08:00:43,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 708 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:43,711 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 604 flow [2023-08-24 08:00:43,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-08-24 08:00:43,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 53 predicate places. [2023-08-24 08:00:43,711 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 604 flow [2023-08-24 08:00:43,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.66666666666666) internal successors, (1916), 12 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:43,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:43,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:43,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:43,912 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,SelfDestructingSolverStorable17 [2023-08-24 08:00:43,912 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:43,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1810387387, now seen corresponding path program 5 times [2023-08-24 08:00:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:43,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567476400] [2023-08-24 08:00:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:43,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:44,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:44,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567476400] [2023-08-24 08:00:44,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567476400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:44,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287973752] [2023-08-24 08:00:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:44,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:44,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:44,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:44,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 08:00:44,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:00:44,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:44,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:44,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:44,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:44,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287973752] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:44,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:44,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-24 08:00:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757548406] [2023-08-24 08:00:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:00:44,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:00:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:00:44,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 604 flow. Second operand has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:44,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:44,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:44,615 INFO L124 PetriNetUnfolderBase]: 172/314 cut-off events. [2023-08-24 08:00:44,615 INFO L125 PetriNetUnfolderBase]: For 1242/1256 co-relation queries the response was YES. [2023-08-24 08:00:44,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 314 events. 172/314 cut-off events. For 1242/1256 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1208 event pairs, 6 based on Foata normal form. 5/313 useless extension candidates. Maximal degree in co-relation 1527. Up to 234 conditions per place. [2023-08-24 08:00:44,618 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 61 selfloop transitions, 20 changer transitions 5/94 dead transitions. [2023-08-24 08:00:44,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 881 flow [2023-08-24 08:00:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1138 transitions. [2023-08-24 08:00:44,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39555092109836637 [2023-08-24 08:00:44,620 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1138 transitions. [2023-08-24 08:00:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1138 transitions. [2023-08-24 08:00:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:44,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1138 transitions. [2023-08-24 08:00:44,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:44,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:44,625 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:44,626 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 604 flow. Second operand 7 states and 1138 transitions. [2023-08-24 08:00:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 881 flow [2023-08-24 08:00:44,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 94 transitions, 850 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 08:00:44,633 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 683 flow [2023-08-24 08:00:44,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2023-08-24 08:00:44,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-08-24 08:00:44,634 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 683 flow [2023-08-24 08:00:44,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 159.42857142857142) internal successors, (2232), 14 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:44,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:44,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:44,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:44,840 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:44,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1341209845, now seen corresponding path program 6 times [2023-08-24 08:00:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018095937] [2023-08-24 08:00:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:45,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018095937] [2023-08-24 08:00:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018095937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:45,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58366927] [2023-08-24 08:00:45,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:00:45,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:45,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:45,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 08:00:45,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:00:45,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:45,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 08:00:45,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:45,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58366927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:45,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 08:00:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424758896] [2023-08-24 08:00:45,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:00:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:00:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:00:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:00:45,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 683 flow. Second operand has 13 states, 13 states have (on average 159.23076923076923) internal successors, (2070), 13 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:45,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:45,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:00:45,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:45,597 INFO L124 PetriNetUnfolderBase]: 168/304 cut-off events. [2023-08-24 08:00:45,597 INFO L125 PetriNetUnfolderBase]: For 1505/1519 co-relation queries the response was YES. [2023-08-24 08:00:45,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1593 conditions, 304 events. 168/304 cut-off events. For 1505/1519 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1159 event pairs, 6 based on Foata normal form. 5/303 useless extension candidates. Maximal degree in co-relation 1564. Up to 234 conditions per place. [2023-08-24 08:00:45,600 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 59 selfloop transitions, 21 changer transitions 5/93 dead transitions. [2023-08-24 08:00:45,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 924 flow [2023-08-24 08:00:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1136 transitions. [2023-08-24 08:00:45,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948557525199861 [2023-08-24 08:00:45,605 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1136 transitions. [2023-08-24 08:00:45,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1136 transitions. [2023-08-24 08:00:45,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:45,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1136 transitions. [2023-08-24 08:00:45,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.28571428571428) internal successors, (1136), 7 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:45,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:45,611 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:45,611 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 683 flow. Second operand 7 states and 1136 transitions. [2023-08-24 08:00:45,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 924 flow [2023-08-24 08:00:45,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 93 transitions, 860 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-08-24 08:00:45,619 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 713 flow [2023-08-24 08:00:45,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=713, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-24 08:00:45,620 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-08-24 08:00:45,620 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 713 flow [2023-08-24 08:00:45,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 159.23076923076923) internal successors, (2070), 13 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:45,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:45,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:45,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:45,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:45,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:45,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1867385005, now seen corresponding path program 7 times [2023-08-24 08:00:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968767266] [2023-08-24 08:00:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968767266] [2023-08-24 08:00:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968767266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401164352] [2023-08-24 08:00:45,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:00:45,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:45,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:45,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:45,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 08:00:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:45,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:46,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:46,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:46,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401164352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:46,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 08:00:46,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44282663] [2023-08-24 08:00:46,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:00:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:00:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:00:46,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:46,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 713 flow. Second operand has 13 states, 13 states have (on average 169.23076923076923) internal successors, (2200), 13 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:46,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:46,328 INFO L124 PetriNetUnfolderBase]: 225/394 cut-off events. [2023-08-24 08:00:46,328 INFO L125 PetriNetUnfolderBase]: For 2217/2217 co-relation queries the response was YES. [2023-08-24 08:00:46,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 394 events. 225/394 cut-off events. For 2217/2217 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1481 event pairs, 30 based on Foata normal form. 20/414 useless extension candidates. Maximal degree in co-relation 2008. Up to 156 conditions per place. [2023-08-24 08:00:46,332 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 83 selfloop transitions, 49 changer transitions 0/132 dead transitions. [2023-08-24 08:00:46,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1345 flow [2023-08-24 08:00:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:00:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:00:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2413 transitions. [2023-08-24 08:00:46,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41936044490789015 [2023-08-24 08:00:46,335 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2413 transitions. [2023-08-24 08:00:46,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2413 transitions. [2023-08-24 08:00:46,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:46,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2413 transitions. [2023-08-24 08:00:46,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 172.35714285714286) internal successors, (2413), 14 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,345 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,345 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 713 flow. Second operand 14 states and 2413 transitions. [2023-08-24 08:00:46,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1345 flow [2023-08-24 08:00:46,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1286 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:46,353 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 1052 flow [2023-08-24 08:00:46,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1052, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2023-08-24 08:00:46,354 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 81 predicate places. [2023-08-24 08:00:46,354 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 1052 flow [2023-08-24 08:00:46,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.23076923076923) internal successors, (2200), 13 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:46,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:46,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:46,562 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,SelfDestructingSolverStorable20 [2023-08-24 08:00:46,562 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:46,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 947750063, now seen corresponding path program 8 times [2023-08-24 08:00:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973283006] [2023-08-24 08:00:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973283006] [2023-08-24 08:00:46,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973283006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:46,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83741462] [2023-08-24 08:00:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:00:46,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:46,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:46,637 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:46,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 08:00:46,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:00:46,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:46,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:46,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:46,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83741462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:46,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:46,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 08:00:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777858269] [2023-08-24 08:00:46,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:46,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:00:46,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:00:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:00:46,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:46,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 1052 flow. Second operand has 11 states, 11 states have (on average 169.27272727272728) internal successors, (1862), 11 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:46,998 INFO L124 PetriNetUnfolderBase]: 278/487 cut-off events. [2023-08-24 08:00:46,998 INFO L125 PetriNetUnfolderBase]: For 4354/4354 co-relation queries the response was YES. [2023-08-24 08:00:47,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 487 events. 278/487 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1936 event pairs, 28 based on Foata normal form. 6/493 useless extension candidates. Maximal degree in co-relation 2934. Up to 151 conditions per place. [2023-08-24 08:00:47,003 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 95 selfloop transitions, 60 changer transitions 0/155 dead transitions. [2023-08-24 08:00:47,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 155 transitions, 1906 flow [2023-08-24 08:00:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:00:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:00:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1734 transitions. [2023-08-24 08:00:47,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4218978102189781 [2023-08-24 08:00:47,006 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1734 transitions. [2023-08-24 08:00:47,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1734 transitions. [2023-08-24 08:00:47,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:47,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1734 transitions. [2023-08-24 08:00:47,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 173.4) internal successors, (1734), 10 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,012 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,012 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 1052 flow. Second operand 10 states and 1734 transitions. [2023-08-24 08:00:47,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 155 transitions, 1906 flow [2023-08-24 08:00:47,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1575 flow, removed 142 selfloop flow, removed 2 redundant places. [2023-08-24 08:00:47,030 INFO L231 Difference]: Finished difference. Result has 115 places, 118 transitions, 1245 flow [2023-08-24 08:00:47,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1245, PETRI_PLACES=115, PETRI_TRANSITIONS=118} [2023-08-24 08:00:47,031 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-08-24 08:00:47,031 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 118 transitions, 1245 flow [2023-08-24 08:00:47,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.27272727272728) internal successors, (1862), 11 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:47,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:47,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 08:00:47,240 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,SelfDestructingSolverStorable21 [2023-08-24 08:00:47,240 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:47,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:47,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1814142836, now seen corresponding path program 9 times [2023-08-24 08:00:47,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:47,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741579973] [2023-08-24 08:00:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:47,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:47,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741579973] [2023-08-24 08:00:47,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741579973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:47,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319855668] [2023-08-24 08:00:47,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:00:47,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:47,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:47,305 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:47,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 08:00:47,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:00:47,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:47,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:47,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:47,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:47,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319855668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:47,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:47,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 08:00:47,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400081933] [2023-08-24 08:00:47,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:47,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:00:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:00:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:00:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:47,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 118 transitions, 1245 flow. Second operand has 11 states, 11 states have (on average 169.36363636363637) internal successors, (1863), 11 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:47,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:47,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:47,635 INFO L124 PetriNetUnfolderBase]: 280/497 cut-off events. [2023-08-24 08:00:47,635 INFO L125 PetriNetUnfolderBase]: For 4628/4628 co-relation queries the response was YES. [2023-08-24 08:00:47,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2994 conditions, 497 events. 280/497 cut-off events. For 4628/4628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2023 event pairs, 55 based on Foata normal form. 4/501 useless extension candidates. Maximal degree in co-relation 2946. Up to 267 conditions per place. [2023-08-24 08:00:47,642 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 101 selfloop transitions, 34 changer transitions 10/145 dead transitions. [2023-08-24 08:00:47,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 145 transitions, 1741 flow [2023-08-24 08:00:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:00:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:00:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-24 08:00:47,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230100799443865 [2023-08-24 08:00:47,644 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-24 08:00:47,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-24 08:00:47,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:47,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-24 08:00:47,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:47,651 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:00:47,652 INFO L175 Difference]: Start difference. First operand has 115 places, 118 transitions, 1245 flow. Second operand 7 states and 1217 transitions. [2023-08-24 08:00:47,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 145 transitions, 1741 flow [2023-08-24 08:00:47,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 145 transitions, 1659 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-08-24 08:00:47,672 INFO L231 Difference]: Finished difference. Result has 121 places, 117 transitions, 1226 flow [2023-08-24 08:00:47,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1226, PETRI_PLACES=121, PETRI_TRANSITIONS=117} [2023-08-24 08:00:47,673 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2023-08-24 08:00:47,673 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 117 transitions, 1226 flow [2023-08-24 08:00:47,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.36363636363637) internal successors, (1863), 11 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:47,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:47,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:47,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:47,878 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,SelfDestructingSolverStorable22 [2023-08-24 08:00:47,879 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:47,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash -630564849, now seen corresponding path program 10 times [2023-08-24 08:00:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:47,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833487890] [2023-08-24 08:00:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:47,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833487890] [2023-08-24 08:00:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833487890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674549715] [2023-08-24 08:00:47,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:00:47,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:47,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:47,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:47,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 08:00:48,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:00:48,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:48,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:48,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:48,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:48,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674549715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:48,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:48,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:00:48,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031918730] [2023-08-24 08:00:48,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:48,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:48,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:48,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:48,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:48,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:48,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 117 transitions, 1226 flow. Second operand has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:48,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:48,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:48,435 INFO L124 PetriNetUnfolderBase]: 331/578 cut-off events. [2023-08-24 08:00:48,436 INFO L125 PetriNetUnfolderBase]: For 6496/6496 co-relation queries the response was YES. [2023-08-24 08:00:48,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3494 conditions, 578 events. 331/578 cut-off events. For 6496/6496 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2394 event pairs, 36 based on Foata normal form. 14/592 useless extension candidates. Maximal degree in co-relation 3444. Up to 230 conditions per place. [2023-08-24 08:00:48,442 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 82 selfloop transitions, 94 changer transitions 1/177 dead transitions. [2023-08-24 08:00:48,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 177 transitions, 2164 flow [2023-08-24 08:00:48,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:00:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:00:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2754 transitions. [2023-08-24 08:00:48,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4187956204379562 [2023-08-24 08:00:48,447 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2754 transitions. [2023-08-24 08:00:48,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2754 transitions. [2023-08-24 08:00:48,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:48,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2754 transitions. [2023-08-24 08:00:48,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 172.125) internal successors, (2754), 16 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,457 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,458 INFO L175 Difference]: Start difference. First operand has 121 places, 117 transitions, 1226 flow. Second operand 16 states and 2754 transitions. [2023-08-24 08:00:48,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 177 transitions, 2164 flow [2023-08-24 08:00:48,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 177 transitions, 2073 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-24 08:00:48,478 INFO L231 Difference]: Finished difference. Result has 136 places, 146 transitions, 1825 flow [2023-08-24 08:00:48,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1825, PETRI_PLACES=136, PETRI_TRANSITIONS=146} [2023-08-24 08:00:48,479 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-08-24 08:00:48,479 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 146 transitions, 1825 flow [2023-08-24 08:00:48,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.16666666666666) internal successors, (2030), 12 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:48,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:48,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:48,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:48,685 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:48,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2118428639, now seen corresponding path program 11 times [2023-08-24 08:00:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:48,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814344596] [2023-08-24 08:00:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:48,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:48,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:48,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814344596] [2023-08-24 08:00:48,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814344596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:48,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651378567] [2023-08-24 08:00:48,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:48,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:48,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:48,750 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:48,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 08:00:48,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:00:48,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:48,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:48,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:48,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:48,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651378567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:48,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:48,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:00:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746890332] [2023-08-24 08:00:48,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:48,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:48,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:48,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 146 transitions, 1825 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:49,146 INFO L124 PetriNetUnfolderBase]: 328/573 cut-off events. [2023-08-24 08:00:49,146 INFO L125 PetriNetUnfolderBase]: For 7597/7597 co-relation queries the response was YES. [2023-08-24 08:00:49,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3976 conditions, 573 events. 328/573 cut-off events. For 7597/7597 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2408 event pairs, 49 based on Foata normal form. 4/577 useless extension candidates. Maximal degree in co-relation 3921. Up to 289 conditions per place. [2023-08-24 08:00:49,153 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 89 selfloop transitions, 79 changer transitions 2/170 dead transitions. [2023-08-24 08:00:49,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 170 transitions, 2407 flow [2023-08-24 08:00:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:00:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:00:49,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2233 transitions. [2023-08-24 08:00:49,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179300018716077 [2023-08-24 08:00:49,156 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2233 transitions. [2023-08-24 08:00:49,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2233 transitions. [2023-08-24 08:00:49,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:49,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2233 transitions. [2023-08-24 08:00:49,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 171.76923076923077) internal successors, (2233), 13 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,163 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,163 INFO L175 Difference]: Start difference. First operand has 136 places, 146 transitions, 1825 flow. Second operand 13 states and 2233 transitions. [2023-08-24 08:00:49,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 170 transitions, 2407 flow [2023-08-24 08:00:49,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 170 transitions, 2177 flow, removed 96 selfloop flow, removed 4 redundant places. [2023-08-24 08:00:49,196 INFO L231 Difference]: Finished difference. Result has 146 places, 146 transitions, 1764 flow [2023-08-24 08:00:49,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1764, PETRI_PLACES=146, PETRI_TRANSITIONS=146} [2023-08-24 08:00:49,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 126 predicate places. [2023-08-24 08:00:49,196 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 146 transitions, 1764 flow [2023-08-24 08:00:49,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:49,197 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:49,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:49,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:49,403 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:49,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:49,403 INFO L85 PathProgramCache]: Analyzing trace with hash -621948448, now seen corresponding path program 12 times [2023-08-24 08:00:49,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:49,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167501137] [2023-08-24 08:00:49,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:49,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:49,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167501137] [2023-08-24 08:00:49,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167501137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:49,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469370837] [2023-08-24 08:00:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:00:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:49,467 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:49,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 08:00:49,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:00:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:49,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:49,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:49,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469370837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:49,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:49,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 08:00:49,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442301666] [2023-08-24 08:00:49,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:00:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:49,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:00:49,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:00:49,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:49,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 146 transitions, 1764 flow. Second operand has 13 states, 13 states have (on average 169.15384615384616) internal successors, (2199), 13 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:49,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:49,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:49,867 INFO L124 PetriNetUnfolderBase]: 356/623 cut-off events. [2023-08-24 08:00:49,867 INFO L125 PetriNetUnfolderBase]: For 10317/10317 co-relation queries the response was YES. [2023-08-24 08:00:49,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4369 conditions, 623 events. 356/623 cut-off events. For 10317/10317 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2645 event pairs, 70 based on Foata normal form. 8/631 useless extension candidates. Maximal degree in co-relation 4311. Up to 424 conditions per place. [2023-08-24 08:00:49,874 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 125 selfloop transitions, 54 changer transitions 7/186 dead transitions. [2023-08-24 08:00:49,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 186 transitions, 2596 flow [2023-08-24 08:00:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:00:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:00:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1897 transitions. [2023-08-24 08:00:49,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41959743419597434 [2023-08-24 08:00:49,877 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1897 transitions. [2023-08-24 08:00:49,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1897 transitions. [2023-08-24 08:00:49,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:49,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1897 transitions. [2023-08-24 08:00:49,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 172.45454545454547) internal successors, (1897), 11 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:00:49,884 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:00:49,884 INFO L175 Difference]: Start difference. First operand has 146 places, 146 transitions, 1764 flow. Second operand 11 states and 1897 transitions. [2023-08-24 08:00:49,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 186 transitions, 2596 flow [2023-08-24 08:00:49,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 2426 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-08-24 08:00:49,923 INFO L231 Difference]: Finished difference. Result has 147 places, 157 transitions, 2038 flow [2023-08-24 08:00:49,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2038, PETRI_PLACES=147, PETRI_TRANSITIONS=157} [2023-08-24 08:00:49,924 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 127 predicate places. [2023-08-24 08:00:49,924 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 157 transitions, 2038 flow [2023-08-24 08:00:49,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.15384615384616) internal successors, (2199), 13 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:49,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:49,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:49,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:50,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 08:00:50,130 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:50,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:50,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1291751136, now seen corresponding path program 13 times [2023-08-24 08:00:50,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:50,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608990156] [2023-08-24 08:00:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:50,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608990156] [2023-08-24 08:00:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608990156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:50,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172068486] [2023-08-24 08:00:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:00:50,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:50,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:50,194 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:50,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 08:00:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:50,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:50,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:50,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172068486] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:50,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:50,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:00:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865426370] [2023-08-24 08:00:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:50,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:50,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 157 transitions, 2038 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:50,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:50,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:50,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:50,623 INFO L124 PetriNetUnfolderBase]: 366/631 cut-off events. [2023-08-24 08:00:50,623 INFO L125 PetriNetUnfolderBase]: For 10714/10714 co-relation queries the response was YES. [2023-08-24 08:00:50,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4540 conditions, 631 events. 366/631 cut-off events. For 10714/10714 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2637 event pairs, 72 based on Foata normal form. 16/647 useless extension candidates. Maximal degree in co-relation 4481. Up to 436 conditions per place. [2023-08-24 08:00:50,633 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 129 selfloop transitions, 63 changer transitions 2/194 dead transitions. [2023-08-24 08:00:50,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 194 transitions, 2770 flow [2023-08-24 08:00:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:00:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:00:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2069 transitions. [2023-08-24 08:00:50,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195052716950527 [2023-08-24 08:00:50,638 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2069 transitions. [2023-08-24 08:00:50,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2069 transitions. [2023-08-24 08:00:50,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:50,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2069 transitions. [2023-08-24 08:00:50,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.41666666666666) internal successors, (2069), 12 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:50,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:50,645 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:50,645 INFO L175 Difference]: Start difference. First operand has 147 places, 157 transitions, 2038 flow. Second operand 12 states and 2069 transitions. [2023-08-24 08:00:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 194 transitions, 2770 flow [2023-08-24 08:00:50,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 2540 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-08-24 08:00:50,686 INFO L231 Difference]: Finished difference. Result has 153 places, 166 transitions, 2158 flow [2023-08-24 08:00:50,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2158, PETRI_PLACES=153, PETRI_TRANSITIONS=166} [2023-08-24 08:00:50,687 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-08-24 08:00:50,687 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 166 transitions, 2158 flow [2023-08-24 08:00:50,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:50,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:50,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:50,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 08:00:50,893 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:50,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1941567344, now seen corresponding path program 14 times [2023-08-24 08:00:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:50,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921268853] [2023-08-24 08:00:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:50,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921268853] [2023-08-24 08:00:50,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921268853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210379342] [2023-08-24 08:00:50,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:00:50,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:50,957 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 08:00:51,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:00:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:51,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:51,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:51,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210379342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:51,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:00:51,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444567793] [2023-08-24 08:00:51,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:51,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:51,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 166 transitions, 2158 flow. Second operand has 12 states, 12 states have (on average 169.08333333333334) internal successors, (2029), 12 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:51,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:51,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:51,472 INFO L124 PetriNetUnfolderBase]: 366/625 cut-off events. [2023-08-24 08:00:51,472 INFO L125 PetriNetUnfolderBase]: For 9977/9977 co-relation queries the response was YES. [2023-08-24 08:00:51,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4535 conditions, 625 events. 366/625 cut-off events. For 9977/9977 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2564 event pairs, 75 based on Foata normal form. 8/633 useless extension candidates. Maximal degree in co-relation 4475. Up to 443 conditions per place. [2023-08-24 08:00:51,478 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 127 selfloop transitions, 69 changer transitions 0/196 dead transitions. [2023-08-24 08:00:51,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 196 transitions, 2783 flow [2023-08-24 08:00:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:00:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:00:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2917 transitions. [2023-08-24 08:00:51,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174896235866609 [2023-08-24 08:00:51,482 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2917 transitions. [2023-08-24 08:00:51,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2917 transitions. [2023-08-24 08:00:51,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:51,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2917 transitions. [2023-08-24 08:00:51,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 171.58823529411765) internal successors, (2917), 17 states have internal predecessors, (2917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,491 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,491 INFO L175 Difference]: Start difference. First operand has 153 places, 166 transitions, 2158 flow. Second operand 17 states and 2917 transitions. [2023-08-24 08:00:51,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 196 transitions, 2783 flow [2023-08-24 08:00:51,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 196 transitions, 2443 flow, removed 123 selfloop flow, removed 7 redundant places. [2023-08-24 08:00:51,530 INFO L231 Difference]: Finished difference. Result has 164 places, 172 transitions, 2108 flow [2023-08-24 08:00:51,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2108, PETRI_PLACES=164, PETRI_TRANSITIONS=172} [2023-08-24 08:00:51,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-08-24 08:00:51,530 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 172 transitions, 2108 flow [2023-08-24 08:00:51,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.08333333333334) internal successors, (2029), 12 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:51,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:51,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:51,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 08:00:51,737 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:51,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1920274625, now seen corresponding path program 15 times [2023-08-24 08:00:51,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:51,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386885101] [2023-08-24 08:00:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:51,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:51,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:51,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386885101] [2023-08-24 08:00:51,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386885101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:51,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255762650] [2023-08-24 08:00:51,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:00:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:51,804 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:51,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 08:00:51,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:00:51,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:51,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:51,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:51,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:00:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255762650] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:51,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:00:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266991240] [2023-08-24 08:00:51,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:00:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:00:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:00:51,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:51,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 172 transitions, 2108 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:51,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:51,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:51,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:52,243 INFO L124 PetriNetUnfolderBase]: 417/698 cut-off events. [2023-08-24 08:00:52,243 INFO L125 PetriNetUnfolderBase]: For 9421/9421 co-relation queries the response was YES. [2023-08-24 08:00:52,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4989 conditions, 698 events. 417/698 cut-off events. For 9421/9421 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2904 event pairs, 48 based on Foata normal form. 6/704 useless extension candidates. Maximal degree in co-relation 4925. Up to 302 conditions per place. [2023-08-24 08:00:52,250 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 105 selfloop transitions, 115 changer transitions 1/221 dead transitions. [2023-08-24 08:00:52,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 221 transitions, 3234 flow [2023-08-24 08:00:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:00:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:00:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2406 transitions. [2023-08-24 08:00:52,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181438998957247 [2023-08-24 08:00:52,254 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2406 transitions. [2023-08-24 08:00:52,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2406 transitions. [2023-08-24 08:00:52,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:52,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2406 transitions. [2023-08-24 08:00:52,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 171.85714285714286) internal successors, (2406), 14 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:52,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:52,261 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:52,261 INFO L175 Difference]: Start difference. First operand has 164 places, 172 transitions, 2108 flow. Second operand 14 states and 2406 transitions. [2023-08-24 08:00:52,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 221 transitions, 3234 flow [2023-08-24 08:00:52,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 221 transitions, 2964 flow, removed 56 selfloop flow, removed 12 redundant places. [2023-08-24 08:00:52,291 INFO L231 Difference]: Finished difference. Result has 169 places, 198 transitions, 2694 flow [2023-08-24 08:00:52,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2694, PETRI_PLACES=169, PETRI_TRANSITIONS=198} [2023-08-24 08:00:52,291 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 149 predicate places. [2023-08-24 08:00:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 198 transitions, 2694 flow [2023-08-24 08:00:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:52,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:52,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:52,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:00:52,497 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:52,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -99901777, now seen corresponding path program 16 times [2023-08-24 08:00:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593131772] [2023-08-24 08:00:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:52,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:52,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593131772] [2023-08-24 08:00:52,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593131772] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451933745] [2023-08-24 08:00:52,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:00:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:52,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:52,567 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:52,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 08:00:52,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:00:52,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:52,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:52,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:52,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:52,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451933745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:52,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:52,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:00:52,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622196910] [2023-08-24 08:00:52,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:52,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:00:52,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:52,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:00:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:00:52,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:52,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 198 transitions, 2694 flow. Second operand has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:52,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:52,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:52,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:53,052 INFO L124 PetriNetUnfolderBase]: 454/753 cut-off events. [2023-08-24 08:00:53,052 INFO L125 PetriNetUnfolderBase]: For 12360/12360 co-relation queries the response was YES. [2023-08-24 08:00:53,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5689 conditions, 753 events. 454/753 cut-off events. For 12360/12360 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3180 event pairs, 48 based on Foata normal form. 4/757 useless extension candidates. Maximal degree in co-relation 5623. Up to 316 conditions per place. [2023-08-24 08:00:53,066 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 116 selfloop transitions, 123 changer transitions 4/243 dead transitions. [2023-08-24 08:00:53,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 243 transitions, 3757 flow [2023-08-24 08:00:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:00:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:00:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2742 transitions. [2023-08-24 08:00:53,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416970802919708 [2023-08-24 08:00:53,070 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2742 transitions. [2023-08-24 08:00:53,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2742 transitions. [2023-08-24 08:00:53,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:53,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2742 transitions. [2023-08-24 08:00:53,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.375) internal successors, (2742), 16 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,079 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,079 INFO L175 Difference]: Start difference. First operand has 169 places, 198 transitions, 2694 flow. Second operand 16 states and 2742 transitions. [2023-08-24 08:00:53,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 243 transitions, 3757 flow [2023-08-24 08:00:53,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 243 transitions, 3355 flow, removed 178 selfloop flow, removed 5 redundant places. [2023-08-24 08:00:53,196 INFO L231 Difference]: Finished difference. Result has 184 places, 217 transitions, 3035 flow [2023-08-24 08:00:53,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3035, PETRI_PLACES=184, PETRI_TRANSITIONS=217} [2023-08-24 08:00:53,197 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 164 predicate places. [2023-08-24 08:00:53,197 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 217 transitions, 3035 flow [2023-08-24 08:00:53,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:53,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:53,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:53,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:53,404 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:53,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:53,404 INFO L85 PathProgramCache]: Analyzing trace with hash 19726511, now seen corresponding path program 17 times [2023-08-24 08:00:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981043324] [2023-08-24 08:00:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:53,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:53,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981043324] [2023-08-24 08:00:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981043324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:53,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452446002] [2023-08-24 08:00:53,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:53,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:53,473 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:53,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 08:00:53,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:00:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:53,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:53,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:53,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:53,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452446002] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:53,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:53,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:00:53,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699234775] [2023-08-24 08:00:53,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:53,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:00:53,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:53,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:00:53,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:00:53,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:53,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 217 transitions, 3035 flow. Second operand has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:53,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:53,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:53,943 INFO L124 PetriNetUnfolderBase]: 527/880 cut-off events. [2023-08-24 08:00:53,943 INFO L125 PetriNetUnfolderBase]: For 12717/12717 co-relation queries the response was YES. [2023-08-24 08:00:53,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6623 conditions, 880 events. 527/880 cut-off events. For 12717/12717 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3857 event pairs, 39 based on Foata normal form. 16/896 useless extension candidates. Maximal degree in co-relation 6551. Up to 317 conditions per place. [2023-08-24 08:00:53,950 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 105 selfloop transitions, 173 changer transitions 0/278 dead transitions. [2023-08-24 08:00:53,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 278 transitions, 4278 flow [2023-08-24 08:00:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:00:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:00:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2923 transitions. [2023-08-24 08:00:53,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183483612423071 [2023-08-24 08:00:53,967 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2923 transitions. [2023-08-24 08:00:53,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2923 transitions. [2023-08-24 08:00:53,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:53,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2923 transitions. [2023-08-24 08:00:53,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 171.94117647058823) internal successors, (2923), 17 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,976 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:53,976 INFO L175 Difference]: Start difference. First operand has 184 places, 217 transitions, 3035 flow. Second operand 17 states and 2923 transitions. [2023-08-24 08:00:53,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 278 transitions, 4278 flow [2023-08-24 08:00:54,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 278 transitions, 4045 flow, removed 40 selfloop flow, removed 9 redundant places. [2023-08-24 08:00:54,031 INFO L231 Difference]: Finished difference. Result has 191 places, 250 transitions, 3802 flow [2023-08-24 08:00:54,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3802, PETRI_PLACES=191, PETRI_TRANSITIONS=250} [2023-08-24 08:00:54,031 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-08-24 08:00:54,031 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 250 transitions, 3802 flow [2023-08-24 08:00:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:54,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:54,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:54,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:54,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:54,238 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:54,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:54,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1716823043, now seen corresponding path program 18 times [2023-08-24 08:00:54,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:54,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316931469] [2023-08-24 08:00:54,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:54,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316931469] [2023-08-24 08:00:54,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316931469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420732396] [2023-08-24 08:00:54,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:00:54,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:54,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:54,310 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:54,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 08:00:54,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:00:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:54,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:54,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:54,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:54,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420732396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:54,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:54,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:00:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878697097] [2023-08-24 08:00:54,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:54,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:00:54,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:00:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:00:54,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:54,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 250 transitions, 3802 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:54,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:54,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:54,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:55,054 INFO L124 PetriNetUnfolderBase]: 638/1073 cut-off events. [2023-08-24 08:00:55,054 INFO L125 PetriNetUnfolderBase]: For 16577/16577 co-relation queries the response was YES. [2023-08-24 08:00:55,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8533 conditions, 1073 events. 638/1073 cut-off events. For 16577/16577 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5013 event pairs, 42 based on Foata normal form. 10/1083 useless extension candidates. Maximal degree in co-relation 8459. Up to 352 conditions per place. [2023-08-24 08:00:55,065 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 171 selfloop transitions, 171 changer transitions 0/342 dead transitions. [2023-08-24 08:00:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 342 transitions, 5578 flow [2023-08-24 08:00:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:00:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:00:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3947 transitions. [2023-08-24 08:00:55,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175394054797419 [2023-08-24 08:00:55,071 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3947 transitions. [2023-08-24 08:00:55,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3947 transitions. [2023-08-24 08:00:55,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:55,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3947 transitions. [2023-08-24 08:00:55,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 171.6086956521739) internal successors, (3947), 23 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:55,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:00:55,084 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:00:55,085 INFO L175 Difference]: Start difference. First operand has 191 places, 250 transitions, 3802 flow. Second operand 23 states and 3947 transitions. [2023-08-24 08:00:55,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 342 transitions, 5578 flow [2023-08-24 08:00:55,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 342 transitions, 5102 flow, removed 97 selfloop flow, removed 10 redundant places. [2023-08-24 08:00:55,166 INFO L231 Difference]: Finished difference. Result has 211 places, 300 transitions, 4700 flow [2023-08-24 08:00:55,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4700, PETRI_PLACES=211, PETRI_TRANSITIONS=300} [2023-08-24 08:00:55,166 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2023-08-24 08:00:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 300 transitions, 4700 flow [2023-08-24 08:00:55,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:55,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:55,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:55,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:55,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:55,373 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:55,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:55,374 INFO L85 PathProgramCache]: Analyzing trace with hash 39895549, now seen corresponding path program 19 times [2023-08-24 08:00:55,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496168748] [2023-08-24 08:00:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:55,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:55,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496168748] [2023-08-24 08:00:55,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496168748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:55,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451802703] [2023-08-24 08:00:55,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:00:55,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:55,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:55,447 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:55,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 08:00:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:55,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:55,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:55,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451802703] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:55,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:00:55,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680628777] [2023-08-24 08:00:55,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:55,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:00:55,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:00:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:00:55,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:55,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 300 transitions, 4700 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:55,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:55,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:55,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:56,091 INFO L124 PetriNetUnfolderBase]: 687/1152 cut-off events. [2023-08-24 08:00:56,091 INFO L125 PetriNetUnfolderBase]: For 22639/22639 co-relation queries the response was YES. [2023-08-24 08:00:56,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9659 conditions, 1152 events. 687/1152 cut-off events. For 22639/22639 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5445 event pairs, 150 based on Foata normal form. 28/1180 useless extension candidates. Maximal degree in co-relation 9577. Up to 990 conditions per place. [2023-08-24 08:00:56,101 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 301 selfloop transitions, 59 changer transitions 0/360 dead transitions. [2023-08-24 08:00:56,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 6324 flow [2023-08-24 08:00:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:00:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:00:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3269 transitions. [2023-08-24 08:00:56,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41861954155461645 [2023-08-24 08:00:56,105 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3269 transitions. [2023-08-24 08:00:56,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3269 transitions. [2023-08-24 08:00:56,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:56,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3269 transitions. [2023-08-24 08:00:56,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 172.05263157894737) internal successors, (3269), 19 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:56,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:00:56,115 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:00:56,115 INFO L175 Difference]: Start difference. First operand has 211 places, 300 transitions, 4700 flow. Second operand 19 states and 3269 transitions. [2023-08-24 08:00:56,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 6324 flow [2023-08-24 08:00:56,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 360 transitions, 6134 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-08-24 08:00:56,208 INFO L231 Difference]: Finished difference. Result has 232 places, 325 transitions, 5396 flow [2023-08-24 08:00:56,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5396, PETRI_PLACES=232, PETRI_TRANSITIONS=325} [2023-08-24 08:00:56,208 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 212 predicate places. [2023-08-24 08:00:56,209 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 325 transitions, 5396 flow [2023-08-24 08:00:56,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:56,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:56,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:56,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-24 08:00:56,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:56,414 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:56,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1231569551, now seen corresponding path program 20 times [2023-08-24 08:00:56,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:56,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905987538] [2023-08-24 08:00:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:56,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905987538] [2023-08-24 08:00:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905987538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644907123] [2023-08-24 08:00:56,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:00:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:56,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:56,486 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:56,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 08:00:56,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:00:56,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:56,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:56,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:56,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:56,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644907123] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:56,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:56,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:00:56,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016796110] [2023-08-24 08:00:56,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:56,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:00:56,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:00:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:00:56,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:56,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 325 transitions, 5396 flow. Second operand has 12 states, 12 states have (on average 169.08333333333334) internal successors, (2029), 12 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:56,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:56,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:56,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:57,108 INFO L124 PetriNetUnfolderBase]: 740/1235 cut-off events. [2023-08-24 08:00:57,108 INFO L125 PetriNetUnfolderBase]: For 32341/32341 co-relation queries the response was YES. [2023-08-24 08:00:57,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11114 conditions, 1235 events. 740/1235 cut-off events. For 32341/32341 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5900 event pairs, 87 based on Foata normal form. 12/1247 useless extension candidates. Maximal degree in co-relation 11019. Up to 749 conditions per place. [2023-08-24 08:00:57,122 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 236 selfloop transitions, 148 changer transitions 0/384 dead transitions. [2023-08-24 08:00:57,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 384 transitions, 7222 flow [2023-08-24 08:00:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:00:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:00:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2927 transitions. [2023-08-24 08:00:57,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41892085301273796 [2023-08-24 08:00:57,126 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2927 transitions. [2023-08-24 08:00:57,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2927 transitions. [2023-08-24 08:00:57,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:57,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2927 transitions. [2023-08-24 08:00:57,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 172.1764705882353) internal successors, (2927), 17 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:57,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:57,135 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:57,135 INFO L175 Difference]: Start difference. First operand has 232 places, 325 transitions, 5396 flow. Second operand 17 states and 2927 transitions. [2023-08-24 08:00:57,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 384 transitions, 7222 flow [2023-08-24 08:00:57,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 384 transitions, 6483 flow, removed 343 selfloop flow, removed 9 redundant places. [2023-08-24 08:00:57,281 INFO L231 Difference]: Finished difference. Result has 244 places, 351 transitions, 5851 flow [2023-08-24 08:00:57,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=4805, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5851, PETRI_PLACES=244, PETRI_TRANSITIONS=351} [2023-08-24 08:00:57,281 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2023-08-24 08:00:57,282 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 351 transitions, 5851 flow [2023-08-24 08:00:57,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.08333333333334) internal successors, (2029), 12 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:57,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:57,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:57,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 08:00:57,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:57,488 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:57,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -511898913, now seen corresponding path program 21 times [2023-08-24 08:00:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869817653] [2023-08-24 08:00:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:57,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:57,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869817653] [2023-08-24 08:00:57,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869817653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:57,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401739590] [2023-08-24 08:00:57,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:00:57,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:57,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:57,561 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:57,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 08:00:57,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:00:57,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:57,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:57,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:57,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:57,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401739590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:57,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:57,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:00:57,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374578338] [2023-08-24 08:00:57,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:00:57,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:00:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:00:57,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:57,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 351 transitions, 5851 flow. Second operand has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:57,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:57,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:57,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:58,196 INFO L124 PetriNetUnfolderBase]: 784/1303 cut-off events. [2023-08-24 08:00:58,197 INFO L125 PetriNetUnfolderBase]: For 37487/37487 co-relation queries the response was YES. [2023-08-24 08:00:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11996 conditions, 1303 events. 784/1303 cut-off events. For 37487/37487 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6285 event pairs, 158 based on Foata normal form. 8/1311 useless extension candidates. Maximal degree in co-relation 11899. Up to 1106 conditions per place. [2023-08-24 08:00:58,275 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 310 selfloop transitions, 81 changer transitions 5/396 dead transitions. [2023-08-24 08:00:58,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 396 transitions, 7636 flow [2023-08-24 08:00:58,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:00:58,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:00:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2740 transitions. [2023-08-24 08:00:58,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-24 08:00:58,279 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2740 transitions. [2023-08-24 08:00:58,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2740 transitions. [2023-08-24 08:00:58,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:58,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2740 transitions. [2023-08-24 08:00:58,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.25) internal successors, (2740), 16 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:58,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:58,287 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:58,287 INFO L175 Difference]: Start difference. First operand has 244 places, 351 transitions, 5851 flow. Second operand 16 states and 2740 transitions. [2023-08-24 08:00:58,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 396 transitions, 7636 flow [2023-08-24 08:00:58,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 396 transitions, 6862 flow, removed 346 selfloop flow, removed 15 redundant places. [2023-08-24 08:00:58,448 INFO L231 Difference]: Finished difference. Result has 251 places, 371 transitions, 6041 flow [2023-08-24 08:00:58,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6041, PETRI_PLACES=251, PETRI_TRANSITIONS=371} [2023-08-24 08:00:58,448 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 231 predicate places. [2023-08-24 08:00:58,449 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 371 transitions, 6041 flow [2023-08-24 08:00:58,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:58,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:58,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:58,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:58,654 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,SelfDestructingSolverStorable34 [2023-08-24 08:00:58,655 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:58,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 992043358, now seen corresponding path program 22 times [2023-08-24 08:00:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134201863] [2023-08-24 08:00:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134201863] [2023-08-24 08:00:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134201863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271693921] [2023-08-24 08:00:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:00:58,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:58,721 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:00:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 08:00:58,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:00:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:00:58,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:00:58,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:00:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:58,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:00:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271693921] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:00:58,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:00:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:00:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941665644] [2023-08-24 08:00:58,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:00:58,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:00:58,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:00:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:00:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:00:58,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:00:58,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 371 transitions, 6041 flow. Second operand has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:58,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:00:58,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:00:58,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:00:59,472 INFO L124 PetriNetUnfolderBase]: 856/1411 cut-off events. [2023-08-24 08:00:59,473 INFO L125 PetriNetUnfolderBase]: For 46210/46210 co-relation queries the response was YES. [2023-08-24 08:00:59,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12937 conditions, 1411 events. 856/1411 cut-off events. For 46210/46210 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6854 event pairs, 35 based on Foata normal form. 36/1447 useless extension candidates. Maximal degree in co-relation 12841. Up to 967 conditions per place. [2023-08-24 08:00:59,490 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 322 selfloop transitions, 127 changer transitions 0/449 dead transitions. [2023-08-24 08:00:59,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 449 transitions, 8388 flow [2023-08-24 08:00:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:00:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:00:59,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3942 transitions. [2023-08-24 08:00:59,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170104728657569 [2023-08-24 08:00:59,497 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3942 transitions. [2023-08-24 08:00:59,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3942 transitions. [2023-08-24 08:00:59,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:00:59,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3942 transitions. [2023-08-24 08:00:59,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 171.3913043478261) internal successors, (3942), 23 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:59,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:00:59,510 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:00:59,510 INFO L175 Difference]: Start difference. First operand has 251 places, 371 transitions, 6041 flow. Second operand 23 states and 3942 transitions. [2023-08-24 08:00:59,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 449 transitions, 8388 flow [2023-08-24 08:00:59,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 449 transitions, 8193 flow, removed 78 selfloop flow, removed 6 redundant places. [2023-08-24 08:00:59,719 INFO L231 Difference]: Finished difference. Result has 277 places, 420 transitions, 7559 flow [2023-08-24 08:00:59,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=5839, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7559, PETRI_PLACES=277, PETRI_TRANSITIONS=420} [2023-08-24 08:00:59,719 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 257 predicate places. [2023-08-24 08:00:59,719 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 420 transitions, 7559 flow [2023-08-24 08:00:59,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.73333333333332) internal successors, (2531), 15 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:00:59,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:00:59,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:00:59,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 08:00:59,920 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,SelfDestructingSolverStorable35 [2023-08-24 08:00:59,920 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:00:59,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:00:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash -507344033, now seen corresponding path program 23 times [2023-08-24 08:00:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:00:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804132032] [2023-08-24 08:00:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:00:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:00:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:00:59,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:00:59,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:00:59,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804132032] [2023-08-24 08:00:59,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804132032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:00:59,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792227951] [2023-08-24 08:00:59,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:00:59,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:00:59,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:00:59,981 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:00,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 08:01:00,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:00,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:00,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:00,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:00,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792227951] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:00,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:00,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:01:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658099857] [2023-08-24 08:01:00,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:00,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:01:00,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:01:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:01:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:00,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 420 transitions, 7559 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:00,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:00,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:00,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:00,505 INFO L124 PetriNetUnfolderBase]: 853/1410 cut-off events. [2023-08-24 08:01:00,505 INFO L125 PetriNetUnfolderBase]: For 47750/47750 co-relation queries the response was YES. [2023-08-24 08:01:00,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13369 conditions, 1410 events. 853/1410 cut-off events. For 47750/47750 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6902 event pairs, 108 based on Foata normal form. 6/1416 useless extension candidates. Maximal degree in co-relation 13261. Up to 882 conditions per place. [2023-08-24 08:01:00,519 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 274 selfloop transitions, 161 changer transitions 3/438 dead transitions. [2023-08-24 08:01:00,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 438 transitions, 8746 flow [2023-08-24 08:01:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:01:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:01:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2065 transitions. [2023-08-24 08:01:00,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186942416869424 [2023-08-24 08:01:00,528 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2065 transitions. [2023-08-24 08:01:00,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2065 transitions. [2023-08-24 08:01:00,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:00,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2065 transitions. [2023-08-24 08:01:00,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 172.08333333333334) internal successors, (2065), 12 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) [2023-08-24 08:01:00,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:00,539 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:00,539 INFO L175 Difference]: Start difference. First operand has 277 places, 420 transitions, 7559 flow. Second operand 12 states and 2065 transitions. [2023-08-24 08:01:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 438 transitions, 8746 flow [2023-08-24 08:01:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 438 transitions, 7623 flow, removed 512 selfloop flow, removed 8 redundant places. [2023-08-24 08:01:00,794 INFO L231 Difference]: Finished difference. Result has 280 places, 417 transitions, 6853 flow [2023-08-24 08:01:00,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6483, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6853, PETRI_PLACES=280, PETRI_TRANSITIONS=417} [2023-08-24 08:01:00,794 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 260 predicate places. [2023-08-24 08:01:00,795 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 417 transitions, 6853 flow [2023-08-24 08:01:00,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:00,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:00,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:00,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:01,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 08:01:01,001 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:01,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:01,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1853891118, now seen corresponding path program 24 times [2023-08-24 08:01:01,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:01,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661703374] [2023-08-24 08:01:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:01,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:01,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661703374] [2023-08-24 08:01:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661703374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949884644] [2023-08-24 08:01:01,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:01,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:01,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 08:01:01,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:01:01,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:01,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:01,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:01,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949884644] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:01,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:01,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:01:01,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507380905] [2023-08-24 08:01:01,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:01,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:01:01,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:01:01,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:01:01,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:01,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 417 transitions, 6853 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:01,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:01,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:01,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:01,713 INFO L124 PetriNetUnfolderBase]: 856/1421 cut-off events. [2023-08-24 08:01:01,713 INFO L125 PetriNetUnfolderBase]: For 31211/31211 co-relation queries the response was YES. [2023-08-24 08:01:01,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12382 conditions, 1421 events. 856/1421 cut-off events. For 31211/31211 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7004 event pairs, 47 based on Foata normal form. 12/1433 useless extension candidates. Maximal degree in co-relation 12273. Up to 959 conditions per place. [2023-08-24 08:01:01,726 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 335 selfloop transitions, 111 changer transitions 1/447 dead transitions. [2023-08-24 08:01:01,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 447 transitions, 8042 flow [2023-08-24 08:01:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:01:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:01:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2409 transitions. [2023-08-24 08:01:01,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186652763295099 [2023-08-24 08:01:01,729 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2409 transitions. [2023-08-24 08:01:01,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2409 transitions. [2023-08-24 08:01:01,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:01,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2409 transitions. [2023-08-24 08:01:01,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 172.07142857142858) internal successors, (2409), 14 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:01,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:01,737 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:01,737 INFO L175 Difference]: Start difference. First operand has 280 places, 417 transitions, 6853 flow. Second operand 14 states and 2409 transitions. [2023-08-24 08:01:01,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 447 transitions, 8042 flow [2023-08-24 08:01:01,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 447 transitions, 7673 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-08-24 08:01:01,934 INFO L231 Difference]: Finished difference. Result has 281 places, 419 transitions, 6786 flow [2023-08-24 08:01:01,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6486, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6786, PETRI_PLACES=281, PETRI_TRANSITIONS=419} [2023-08-24 08:01:01,935 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 261 predicate places. [2023-08-24 08:01:01,935 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 419 transitions, 6786 flow [2023-08-24 08:01:01,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:01,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:01,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:01,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 08:01:02,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:02,137 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:02,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:02,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2064269009, now seen corresponding path program 25 times [2023-08-24 08:01:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:02,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581298743] [2023-08-24 08:01:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:02,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581298743] [2023-08-24 08:01:02,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581298743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:02,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602449950] [2023-08-24 08:01:02,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:01:02,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:02,197 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:02,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 08:01:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:02,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:02,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:02,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:02,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602449950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:02,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:02,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 08:01:02,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222896240] [2023-08-24 08:01:02,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:02,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:01:02,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:02,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:01:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:01:02,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:02,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 419 transitions, 6786 flow. Second operand has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:02,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:02,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:02,681 INFO L124 PetriNetUnfolderBase]: 857/1430 cut-off events. [2023-08-24 08:01:02,681 INFO L125 PetriNetUnfolderBase]: For 31038/31038 co-relation queries the response was YES. [2023-08-24 08:01:02,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12304 conditions, 1430 events. 857/1430 cut-off events. For 31038/31038 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7112 event pairs, 125 based on Foata normal form. 2/1432 useless extension candidates. Maximal degree in co-relation 12193. Up to 967 conditions per place. [2023-08-24 08:01:02,695 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 332 selfloop transitions, 101 changer transitions 5/438 dead transitions. [2023-08-24 08:01:02,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 438 transitions, 7859 flow [2023-08-24 08:01:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:01:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:01:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1211 transitions. [2023-08-24 08:01:02,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209245742092457 [2023-08-24 08:01:02,698 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1211 transitions. [2023-08-24 08:01:02,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1211 transitions. [2023-08-24 08:01:02,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:02,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1211 transitions. [2023-08-24 08:01:02,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.0) internal successors, (1211), 7 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:01:02,702 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 411.0) internal successors, (3288), 8 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) [2023-08-24 08:01:02,702 INFO L175 Difference]: Start difference. First operand has 281 places, 419 transitions, 6786 flow. Second operand 7 states and 1211 transitions. [2023-08-24 08:01:02,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 438 transitions, 7859 flow [2023-08-24 08:01:02,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 438 transitions, 7632 flow, removed 62 selfloop flow, removed 6 redundant places. [2023-08-24 08:01:02,935 INFO L231 Difference]: Finished difference. Result has 284 places, 418 transitions, 6753 flow [2023-08-24 08:01:02,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6559, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6753, PETRI_PLACES=284, PETRI_TRANSITIONS=418} [2023-08-24 08:01:02,936 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 264 predicate places. [2023-08-24 08:01:02,936 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 418 transitions, 6753 flow [2023-08-24 08:01:02,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:02,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:02,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:02,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:03,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 08:01:03,137 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:03,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2015183055, now seen corresponding path program 26 times [2023-08-24 08:01:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:03,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641122875] [2023-08-24 08:01:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:03,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:03,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641122875] [2023-08-24 08:01:03,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641122875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:03,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191652745] [2023-08-24 08:01:03,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:03,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:03,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:03,205 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:03,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 08:01:03,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:03,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:03,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:03,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:03,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191652745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:03,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:03,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 08:01:03,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415130026] [2023-08-24 08:01:03,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:03,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:01:03,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:01:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:01:03,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:03,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 418 transitions, 6753 flow. Second operand has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:03,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:03,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:03,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:03,766 INFO L124 PetriNetUnfolderBase]: 850/1409 cut-off events. [2023-08-24 08:01:03,766 INFO L125 PetriNetUnfolderBase]: For 29306/29306 co-relation queries the response was YES. [2023-08-24 08:01:03,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12083 conditions, 1409 events. 850/1409 cut-off events. For 29306/29306 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6925 event pairs, 125 based on Foata normal form. 2/1411 useless extension candidates. Maximal degree in co-relation 11969. Up to 967 conditions per place. [2023-08-24 08:01:03,778 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 313 selfloop transitions, 116 changer transitions 4/433 dead transitions. [2023-08-24 08:01:03,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 433 transitions, 7756 flow [2023-08-24 08:01:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:01:03,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:01:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1718 transitions. [2023-08-24 08:01:03,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180048661800487 [2023-08-24 08:01:03,780 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1718 transitions. [2023-08-24 08:01:03,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1718 transitions. [2023-08-24 08:01:03,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:03,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1718 transitions. [2023-08-24 08:01:03,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.8) internal successors, (1718), 10 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:03,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:03,785 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:03,785 INFO L175 Difference]: Start difference. First operand has 284 places, 418 transitions, 6753 flow. Second operand 10 states and 1718 transitions. [2023-08-24 08:01:03,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 433 transitions, 7756 flow [2023-08-24 08:01:03,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 433 transitions, 7546 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-24 08:01:03,958 INFO L231 Difference]: Finished difference. Result has 285 places, 415 transitions, 6730 flow [2023-08-24 08:01:03,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6531, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6730, PETRI_PLACES=285, PETRI_TRANSITIONS=415} [2023-08-24 08:01:03,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-08-24 08:01:03,959 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 415 transitions, 6730 flow [2023-08-24 08:01:03,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 168.92307692307693) internal successors, (2196), 13 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:03,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:03,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:03,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:04,159 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,SelfDestructingSolverStorable39 [2023-08-24 08:01:04,160 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:04,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1806659810, now seen corresponding path program 27 times [2023-08-24 08:01:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:04,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722849839] [2023-08-24 08:01:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:04,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:04,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722849839] [2023-08-24 08:01:04,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722849839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:04,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491920578] [2023-08-24 08:01:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:04,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:04,220 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:04,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 08:01:04,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:04,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:04,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:04,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:04,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491920578] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:04,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-24 08:01:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805679865] [2023-08-24 08:01:04,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:01:04,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:01:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:01:04,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:04,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 415 transitions, 6730 flow. Second operand has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:04,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:04,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:04,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:04,770 INFO L124 PetriNetUnfolderBase]: 900/1487 cut-off events. [2023-08-24 08:01:04,770 INFO L125 PetriNetUnfolderBase]: For 30772/30772 co-relation queries the response was YES. [2023-08-24 08:01:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12574 conditions, 1487 events. 900/1487 cut-off events. For 30772/30772 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 7376 event pairs, 12 based on Foata normal form. 6/1493 useless extension candidates. Maximal degree in co-relation 12463. Up to 722 conditions per place. [2023-08-24 08:01:04,781 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 294 selfloop transitions, 177 changer transitions 0/471 dead transitions. [2023-08-24 08:01:04,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 471 transitions, 8315 flow [2023-08-24 08:01:04,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:01:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:01:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1725 transitions. [2023-08-24 08:01:04,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197080291970803 [2023-08-24 08:01:04,785 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1725 transitions. [2023-08-24 08:01:04,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1725 transitions. [2023-08-24 08:01:04,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:04,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1725 transitions. [2023-08-24 08:01:04,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 172.5) internal successors, (1725), 10 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:04,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:04,790 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:04,790 INFO L175 Difference]: Start difference. First operand has 285 places, 415 transitions, 6730 flow. Second operand 10 states and 1725 transitions. [2023-08-24 08:01:04,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 471 transitions, 8315 flow [2023-08-24 08:01:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 471 transitions, 8081 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-24 08:01:04,943 INFO L231 Difference]: Finished difference. Result has 285 places, 440 transitions, 7232 flow [2023-08-24 08:01:04,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7232, PETRI_PLACES=285, PETRI_TRANSITIONS=440} [2023-08-24 08:01:04,943 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-08-24 08:01:04,944 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 440 transitions, 7232 flow [2023-08-24 08:01:04,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 169.0909090909091) internal successors, (1860), 11 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:04,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:04,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:04,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:05,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:05,145 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:05,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:05,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1626636722, now seen corresponding path program 28 times [2023-08-24 08:01:05,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:05,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764966710] [2023-08-24 08:01:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:05,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764966710] [2023-08-24 08:01:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764966710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197814880] [2023-08-24 08:01:05,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:01:05,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:05,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:05,209 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:05,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 08:01:05,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:01:05,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:05,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:05,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:05,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197814880] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:05,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:01:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608037216] [2023-08-24 08:01:05,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:01:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:01:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:01:05,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:05,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 440 transitions, 7232 flow. Second operand has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:05,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:05,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:05,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:05,824 INFO L124 PetriNetUnfolderBase]: 949/1566 cut-off events. [2023-08-24 08:01:05,824 INFO L125 PetriNetUnfolderBase]: For 37614/37614 co-relation queries the response was YES. [2023-08-24 08:01:05,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13819 conditions, 1566 events. 949/1566 cut-off events. For 37614/37614 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7866 event pairs, 53 based on Foata normal form. 20/1586 useless extension candidates. Maximal degree in co-relation 13705. Up to 895 conditions per place. [2023-08-24 08:01:05,839 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 336 selfloop transitions, 167 changer transitions 6/509 dead transitions. [2023-08-24 08:01:05,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 509 transitions, 9339 flow [2023-08-24 08:01:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:01:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:01:05,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2927 transitions. [2023-08-24 08:01:05,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41892085301273796 [2023-08-24 08:01:05,841 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2927 transitions. [2023-08-24 08:01:05,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2927 transitions. [2023-08-24 08:01:05,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:05,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2927 transitions. [2023-08-24 08:01:05,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 172.1764705882353) internal successors, (2927), 17 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:05,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:05,850 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:05,850 INFO L175 Difference]: Start difference. First operand has 285 places, 440 transitions, 7232 flow. Second operand 17 states and 2927 transitions. [2023-08-24 08:01:05,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 509 transitions, 9339 flow [2023-08-24 08:01:06,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 509 transitions, 8989 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-08-24 08:01:06,087 INFO L231 Difference]: Finished difference. Result has 302 places, 465 transitions, 8199 flow [2023-08-24 08:01:06,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=6922, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8199, PETRI_PLACES=302, PETRI_TRANSITIONS=465} [2023-08-24 08:01:06,088 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 282 predicate places. [2023-08-24 08:01:06,088 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 465 transitions, 8199 flow [2023-08-24 08:01:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:06,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:06,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:06,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:06,289 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:06,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:06,290 INFO L85 PathProgramCache]: Analyzing trace with hash 344065870, now seen corresponding path program 29 times [2023-08-24 08:01:06,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:06,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269739219] [2023-08-24 08:01:06,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:06,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269739219] [2023-08-24 08:01:06,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269739219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732924793] [2023-08-24 08:01:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:01:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:06,361 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:06,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 08:01:06,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:01:06,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:06,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:06,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:06,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:06,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732924793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:06,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:06,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:01:06,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375729389] [2023-08-24 08:01:06,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:01:06,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:06,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:01:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:01:06,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:06,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 465 transitions, 8199 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:06,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:06,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:06,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:06,997 INFO L124 PetriNetUnfolderBase]: 979/1604 cut-off events. [2023-08-24 08:01:06,997 INFO L125 PetriNetUnfolderBase]: For 41700/41700 co-relation queries the response was YES. [2023-08-24 08:01:07,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14618 conditions, 1604 events. 979/1604 cut-off events. For 41700/41700 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7987 event pairs, 41 based on Foata normal form. 14/1618 useless extension candidates. Maximal degree in co-relation 14499. Up to 1011 conditions per place. [2023-08-24 08:01:07,013 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 337 selfloop transitions, 176 changer transitions 0/513 dead transitions. [2023-08-24 08:01:07,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 513 transitions, 9950 flow [2023-08-24 08:01:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:01:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:01:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2749 transitions. [2023-08-24 08:01:07,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180352798053528 [2023-08-24 08:01:07,015 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2749 transitions. [2023-08-24 08:01:07,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2749 transitions. [2023-08-24 08:01:07,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:07,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2749 transitions. [2023-08-24 08:01:07,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.8125) internal successors, (2749), 16 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:07,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:07,022 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:07,022 INFO L175 Difference]: Start difference. First operand has 302 places, 465 transitions, 8199 flow. Second operand 16 states and 2749 transitions. [2023-08-24 08:01:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 513 transitions, 9950 flow [2023-08-24 08:01:07,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 513 transitions, 9211 flow, removed 306 selfloop flow, removed 7 redundant places. [2023-08-24 08:01:07,237 INFO L231 Difference]: Finished difference. Result has 310 places, 485 transitions, 8487 flow [2023-08-24 08:01:07,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=7611, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8487, PETRI_PLACES=310, PETRI_TRANSITIONS=485} [2023-08-24 08:01:07,237 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 290 predicate places. [2023-08-24 08:01:07,238 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 485 transitions, 8487 flow [2023-08-24 08:01:07,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:07,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:07,238 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:07,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-24 08:01:07,438 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,SelfDestructingSolverStorable42 [2023-08-24 08:01:07,438 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:07,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:07,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1730620416, now seen corresponding path program 30 times [2023-08-24 08:01:07,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:07,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813951263] [2023-08-24 08:01:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813951263] [2023-08-24 08:01:07,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813951263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:07,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942544967] [2023-08-24 08:01:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:07,502 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:07,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 08:01:07,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:01:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:07,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:07,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:07,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:07,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942544967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:07,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:07,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-08-24 08:01:07,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381315920] [2023-08-24 08:01:07,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:07,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:01:07,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:07,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:01:07,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:01:07,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:07,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 485 transitions, 8487 flow. Second operand has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:07,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:07,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:08,235 INFO L124 PetriNetUnfolderBase]: 1030/1679 cut-off events. [2023-08-24 08:01:08,235 INFO L125 PetriNetUnfolderBase]: For 39391/39391 co-relation queries the response was YES. [2023-08-24 08:01:08,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15276 conditions, 1679 events. 1030/1679 cut-off events. For 39391/39391 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8407 event pairs, 46 based on Foata normal form. 12/1691 useless extension candidates. Maximal degree in co-relation 15153. Up to 966 conditions per place. [2023-08-24 08:01:08,250 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 314 selfloop transitions, 230 changer transitions 0/544 dead transitions. [2023-08-24 08:01:08,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 544 transitions, 10625 flow [2023-08-24 08:01:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:01:08,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:01:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2920 transitions. [2023-08-24 08:01:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41791899241448405 [2023-08-24 08:01:08,252 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2920 transitions. [2023-08-24 08:01:08,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2920 transitions. [2023-08-24 08:01:08,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:08,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2920 transitions. [2023-08-24 08:01:08,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 171.76470588235293) internal successors, (2920), 17 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,257 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,257 INFO L175 Difference]: Start difference. First operand has 310 places, 485 transitions, 8487 flow. Second operand 17 states and 2920 transitions. [2023-08-24 08:01:08,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 544 transitions, 10625 flow [2023-08-24 08:01:08,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 544 transitions, 10259 flow, removed 63 selfloop flow, removed 13 redundant places. [2023-08-24 08:01:08,439 INFO L231 Difference]: Finished difference. Result has 318 places, 519 transitions, 9701 flow [2023-08-24 08:01:08,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=8095, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9701, PETRI_PLACES=318, PETRI_TRANSITIONS=519} [2023-08-24 08:01:08,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 298 predicate places. [2023-08-24 08:01:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 519 transitions, 9701 flow [2023-08-24 08:01:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:08,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:08,640 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:08,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2044812928, now seen corresponding path program 31 times [2023-08-24 08:01:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125753058] [2023-08-24 08:01:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:08,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:08,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125753058] [2023-08-24 08:01:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125753058] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831927257] [2023-08-24 08:01:08,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:01:08,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:08,700 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:08,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 08:01:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:08,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:08,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:08,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:08,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831927257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:08,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-24 08:01:08,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442623926] [2023-08-24 08:01:08,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:08,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:01:08,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:08,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:01:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:01:08,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:08,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 519 transitions, 9701 flow. Second operand has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:08,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:08,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:09,383 INFO L124 PetriNetUnfolderBase]: 1073/1756 cut-off events. [2023-08-24 08:01:09,383 INFO L125 PetriNetUnfolderBase]: For 40472/40472 co-relation queries the response was YES. [2023-08-24 08:01:09,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16292 conditions, 1756 events. 1073/1756 cut-off events. For 40472/40472 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 8931 event pairs, 53 based on Foata normal form. 2/1758 useless extension candidates. Maximal degree in co-relation 16167. Up to 1178 conditions per place. [2023-08-24 08:01:09,400 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 406 selfloop transitions, 161 changer transitions 0/567 dead transitions. [2023-08-24 08:01:09,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 567 transitions, 11325 flow [2023-08-24 08:01:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:01:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:01:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2399 transitions. [2023-08-24 08:01:09,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41692735488355925 [2023-08-24 08:01:09,403 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2399 transitions. [2023-08-24 08:01:09,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2399 transitions. [2023-08-24 08:01:09,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:09,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2399 transitions. [2023-08-24 08:01:09,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 171.35714285714286) internal successors, (2399), 14 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:09,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:09,409 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 411.0) internal successors, (6165), 15 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:09,409 INFO L175 Difference]: Start difference. First operand has 318 places, 519 transitions, 9701 flow. Second operand 14 states and 2399 transitions. [2023-08-24 08:01:09,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 567 transitions, 11325 flow [2023-08-24 08:01:09,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 567 transitions, 10652 flow, removed 219 selfloop flow, removed 13 redundant places. [2023-08-24 08:01:09,653 INFO L231 Difference]: Finished difference. Result has 325 places, 544 transitions, 9822 flow [2023-08-24 08:01:09,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=8996, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9822, PETRI_PLACES=325, PETRI_TRANSITIONS=544} [2023-08-24 08:01:09,654 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-08-24 08:01:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 544 transitions, 9822 flow [2023-08-24 08:01:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 169.07692307692307) internal successors, (2198), 13 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:09,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:09,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:09,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:09,860 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,SelfDestructingSolverStorable44 [2023-08-24 08:01:09,860 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:09,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 350606976, now seen corresponding path program 32 times [2023-08-24 08:01:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151550532] [2023-08-24 08:01:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:09,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:09,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:09,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151550532] [2023-08-24 08:01:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151550532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408520298] [2023-08-24 08:01:09,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:09,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:09,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:09,918 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:09,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 08:01:10,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:10,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:10,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:01:10,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:10,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:10,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408520298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:10,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:10,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 08:01:10,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390418349] [2023-08-24 08:01:10,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:10,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 08:01:10,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:10,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 08:01:10,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 08:01:10,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:10,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 544 transitions, 9822 flow. Second operand has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:10,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:10,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:10,573 INFO L124 PetriNetUnfolderBase]: 1070/1747 cut-off events. [2023-08-24 08:01:10,573 INFO L125 PetriNetUnfolderBase]: For 37943/37943 co-relation queries the response was YES. [2023-08-24 08:01:10,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15893 conditions, 1747 events. 1070/1747 cut-off events. For 37943/37943 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 8830 event pairs, 71 based on Foata normal form. 8/1755 useless extension candidates. Maximal degree in co-relation 15767. Up to 1030 conditions per place. [2023-08-24 08:01:10,590 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 390 selfloop transitions, 176 changer transitions 4/570 dead transitions. [2023-08-24 08:01:10,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 570 transitions, 11192 flow [2023-08-24 08:01:10,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:01:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:01:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2237 transitions. [2023-08-24 08:01:10,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186786449560172 [2023-08-24 08:01:10,592 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2237 transitions. [2023-08-24 08:01:10,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2237 transitions. [2023-08-24 08:01:10,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:10,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2237 transitions. [2023-08-24 08:01:10,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.07692307692307) internal successors, (2237), 13 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:10,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:10,596 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:10,597 INFO L175 Difference]: Start difference. First operand has 325 places, 544 transitions, 9822 flow. Second operand 13 states and 2237 transitions. [2023-08-24 08:01:10,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 570 transitions, 11192 flow [2023-08-24 08:01:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 570 transitions, 11007 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-08-24 08:01:10,853 INFO L231 Difference]: Finished difference. Result has 330 places, 542 transitions, 9966 flow [2023-08-24 08:01:10,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=9617, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9966, PETRI_PLACES=330, PETRI_TRANSITIONS=542} [2023-08-24 08:01:10,854 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-08-24 08:01:10,854 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 542 transitions, 9966 flow [2023-08-24 08:01:10,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.0) internal successors, (2028), 12 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:10,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:10,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:10,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 08:01:11,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:11,056 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:11,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1952857412, now seen corresponding path program 33 times [2023-08-24 08:01:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494934989] [2023-08-24 08:01:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:11,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494934989] [2023-08-24 08:01:11,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494934989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:11,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829697829] [2023-08-24 08:01:11,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:11,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:11,484 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:11,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 08:01:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:11,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:11,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:11,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:11,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829697829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:11,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:11,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:01:11,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128521753] [2023-08-24 08:01:11,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:01:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:01:11,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:01:11,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:11,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 542 transitions, 9966 flow. Second operand has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:11,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:11,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:11,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:12,668 INFO L124 PetriNetUnfolderBase]: 1243/2084 cut-off events. [2023-08-24 08:01:12,668 INFO L125 PetriNetUnfolderBase]: For 50712/50718 co-relation queries the response was YES. [2023-08-24 08:01:12,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19188 conditions, 2084 events. 1243/2084 cut-off events. For 50712/50718 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 11463 event pairs, 21 based on Foata normal form. 6/2085 useless extension candidates. Maximal degree in co-relation 19062. Up to 1597 conditions per place. [2023-08-24 08:01:12,693 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 541 selfloop transitions, 110 changer transitions 13/674 dead transitions. [2023-08-24 08:01:12,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 674 transitions, 13238 flow [2023-08-24 08:01:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:01:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:01:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1807 transitions. [2023-08-24 08:01:12,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39969033399690335 [2023-08-24 08:01:12,695 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1807 transitions. [2023-08-24 08:01:12,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1807 transitions. [2023-08-24 08:01:12,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:12,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1807 transitions. [2023-08-24 08:01:12,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 164.27272727272728) internal successors, (1807), 11 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:12,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:12,700 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:12,700 INFO L175 Difference]: Start difference. First operand has 330 places, 542 transitions, 9966 flow. Second operand 11 states and 1807 transitions. [2023-08-24 08:01:12,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 674 transitions, 13238 flow [2023-08-24 08:01:12,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 674 transitions, 12951 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-08-24 08:01:12,982 INFO L231 Difference]: Finished difference. Result has 338 places, 603 transitions, 11292 flow [2023-08-24 08:01:12,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11292, PETRI_PLACES=338, PETRI_TRANSITIONS=603} [2023-08-24 08:01:12,983 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-08-24 08:01:12,983 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 603 transitions, 11292 flow [2023-08-24 08:01:12,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.1764705882353) internal successors, (2706), 17 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:12,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:12,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:12,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-24 08:01:13,184 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,SelfDestructingSolverStorable46 [2023-08-24 08:01:13,184 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:13,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1600231622, now seen corresponding path program 34 times [2023-08-24 08:01:13,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:13,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905104787] [2023-08-24 08:01:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:13,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:13,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905104787] [2023-08-24 08:01:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905104787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036463201] [2023-08-24 08:01:13,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:01:13,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:13,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:13,557 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:13,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 08:01:13,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:01:13,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:13,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:13,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:13,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036463201] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:13,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 08:01:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625459524] [2023-08-24 08:01:13,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:13,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:01:13,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:01:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:01:13,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 603 transitions, 11292 flow. Second operand has 16 states, 16 states have (on average 159.125) internal successors, (2546), 16 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:14,816 INFO L124 PetriNetUnfolderBase]: 1260/2123 cut-off events. [2023-08-24 08:01:14,816 INFO L125 PetriNetUnfolderBase]: For 54892/54896 co-relation queries the response was YES. [2023-08-24 08:01:14,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 2123 events. 1260/2123 cut-off events. For 54892/54896 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 11831 event pairs, 25 based on Foata normal form. 4/2121 useless extension candidates. Maximal degree in co-relation 19890. Up to 1747 conditions per place. [2023-08-24 08:01:14,846 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 538 selfloop transitions, 93 changer transitions 19/660 dead transitions. [2023-08-24 08:01:14,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 660 transitions, 13196 flow [2023-08-24 08:01:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:01:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:01:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1955 transitions. [2023-08-24 08:01:14,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39639091646390917 [2023-08-24 08:01:14,848 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1955 transitions. [2023-08-24 08:01:14,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1955 transitions. [2023-08-24 08:01:14,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:14,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1955 transitions. [2023-08-24 08:01:14,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 162.91666666666666) internal successors, (1955), 12 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:14,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:14,853 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:14,853 INFO L175 Difference]: Start difference. First operand has 338 places, 603 transitions, 11292 flow. Second operand 12 states and 1955 transitions. [2023-08-24 08:01:14,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 660 transitions, 13196 flow [2023-08-24 08:01:15,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 660 transitions, 12818 flow, removed 189 selfloop flow, removed 2 redundant places. [2023-08-24 08:01:15,204 INFO L231 Difference]: Finished difference. Result has 351 places, 610 transitions, 11447 flow [2023-08-24 08:01:15,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=10978, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11447, PETRI_PLACES=351, PETRI_TRANSITIONS=610} [2023-08-24 08:01:15,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 331 predicate places. [2023-08-24 08:01:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 610 transitions, 11447 flow [2023-08-24 08:01:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 159.125) internal successors, (2546), 16 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:15,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:15,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:15,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:15,411 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,SelfDestructingSolverStorable47 [2023-08-24 08:01:15,411 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:15,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1056446460, now seen corresponding path program 35 times [2023-08-24 08:01:15,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378689824] [2023-08-24 08:01:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:15,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:15,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378689824] [2023-08-24 08:01:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378689824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890052076] [2023-08-24 08:01:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:01:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:15,852 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:15,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 08:01:15,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:01:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:15,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:15,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:16,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:16,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890052076] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:16,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:16,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 08:01:16,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844304946] [2023-08-24 08:01:16,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:16,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:01:16,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:16,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:01:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:01:16,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:16,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 610 transitions, 11447 flow. Second operand has 20 states, 20 states have (on average 158.9) internal successors, (3178), 20 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:16,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:16,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:16,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:17,094 INFO L124 PetriNetUnfolderBase]: 1238/2084 cut-off events. [2023-08-24 08:01:17,095 INFO L125 PetriNetUnfolderBase]: For 48642/48646 co-relation queries the response was YES. [2023-08-24 08:01:17,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19438 conditions, 2084 events. 1238/2084 cut-off events. For 48642/48646 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 11538 event pairs, 22 based on Foata normal form. 3/2081 useless extension candidates. Maximal degree in co-relation 19299. Up to 1605 conditions per place. [2023-08-24 08:01:17,118 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 533 selfloop transitions, 110 changer transitions 5/658 dead transitions. [2023-08-24 08:01:17,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 658 transitions, 13202 flow [2023-08-24 08:01:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:17,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1480 transitions. [2023-08-24 08:01:17,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001081373344147 [2023-08-24 08:01:17,126 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1480 transitions. [2023-08-24 08:01:17,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1480 transitions. [2023-08-24 08:01:17,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:17,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1480 transitions. [2023-08-24 08:01:17,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.44444444444446) internal successors, (1480), 9 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:17,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:17,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:17,130 INFO L175 Difference]: Start difference. First operand has 351 places, 610 transitions, 11447 flow. Second operand 9 states and 1480 transitions. [2023-08-24 08:01:17,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 658 transitions, 13202 flow [2023-08-24 08:01:17,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 658 transitions, 12895 flow, removed 106 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:17,494 INFO L231 Difference]: Finished difference. Result has 355 places, 614 transitions, 11542 flow [2023-08-24 08:01:17,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=11152, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11542, PETRI_PLACES=355, PETRI_TRANSITIONS=614} [2023-08-24 08:01:17,494 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 335 predicate places. [2023-08-24 08:01:17,494 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 614 transitions, 11542 flow [2023-08-24 08:01:17,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 158.9) internal successors, (3178), 20 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:17,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:17,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:17,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-24 08:01:17,695 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,SelfDestructingSolverStorable48 [2023-08-24 08:01:17,695 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:17,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -714046758, now seen corresponding path program 36 times [2023-08-24 08:01:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:17,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123091265] [2023-08-24 08:01:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:17,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:18,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:18,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123091265] [2023-08-24 08:01:18,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123091265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:18,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592023298] [2023-08-24 08:01:18,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:18,065 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:18,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 08:01:18,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:01:18,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:18,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:18,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:18,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:18,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592023298] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:18,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:18,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 08:01:18,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258203079] [2023-08-24 08:01:18,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:18,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:01:18,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:01:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:01:18,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:18,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 614 transitions, 11542 flow. Second operand has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:18,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:18,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:18,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:19,385 INFO L124 PetriNetUnfolderBase]: 1235/2075 cut-off events. [2023-08-24 08:01:19,386 INFO L125 PetriNetUnfolderBase]: For 49149/49153 co-relation queries the response was YES. [2023-08-24 08:01:19,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19230 conditions, 2075 events. 1235/2075 cut-off events. For 49149/49153 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 11426 event pairs, 21 based on Foata normal form. 3/2072 useless extension candidates. Maximal degree in co-relation 19090. Up to 1669 conditions per place. [2023-08-24 08:01:19,411 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 534 selfloop transitions, 111 changer transitions 5/660 dead transitions. [2023-08-24 08:01:19,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 660 transitions, 13200 flow [2023-08-24 08:01:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:01:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:01:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1796 transitions. [2023-08-24 08:01:19,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39725724397257245 [2023-08-24 08:01:19,418 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1796 transitions. [2023-08-24 08:01:19,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1796 transitions. [2023-08-24 08:01:19,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:19,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1796 transitions. [2023-08-24 08:01:19,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.27272727272728) internal successors, (1796), 11 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:19,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:19,423 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:19,423 INFO L175 Difference]: Start difference. First operand has 355 places, 614 transitions, 11542 flow. Second operand 11 states and 1796 transitions. [2023-08-24 08:01:19,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 660 transitions, 13200 flow [2023-08-24 08:01:19,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 660 transitions, 12953 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-08-24 08:01:19,841 INFO L231 Difference]: Finished difference. Result has 360 places, 620 transitions, 11710 flow [2023-08-24 08:01:19,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=11306, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11710, PETRI_PLACES=360, PETRI_TRANSITIONS=620} [2023-08-24 08:01:19,841 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-24 08:01:19,842 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 620 transitions, 11710 flow [2023-08-24 08:01:19,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 159.0) internal successors, (2862), 18 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:19,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:19,842 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:19,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:20,048 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,SelfDestructingSolverStorable49 [2023-08-24 08:01:20,048 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:20,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:20,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1865361814, now seen corresponding path program 37 times [2023-08-24 08:01:20,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:20,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151761445] [2023-08-24 08:01:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:20,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:20,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151761445] [2023-08-24 08:01:20,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151761445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903566414] [2023-08-24 08:01:20,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:01:20,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:20,385 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:20,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 08:01:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:20,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:20,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:20,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903566414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:20,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:20,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-24 08:01:20,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379045280] [2023-08-24 08:01:20,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:20,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:01:20,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:01:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:01:20,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:20,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 620 transitions, 11710 flow. Second operand has 17 states, 17 states have (on average 159.23529411764707) internal successors, (2707), 17 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:20,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:20,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:20,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:21,581 INFO L124 PetriNetUnfolderBase]: 1259/2125 cut-off events. [2023-08-24 08:01:21,581 INFO L125 PetriNetUnfolderBase]: For 52077/52081 co-relation queries the response was YES. [2023-08-24 08:01:21,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19829 conditions, 2125 events. 1259/2125 cut-off events. For 52077/52081 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 11865 event pairs, 41 based on Foata normal form. 3/2122 useless extension candidates. Maximal degree in co-relation 19689. Up to 1923 conditions per place. [2023-08-24 08:01:21,605 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 576 selfloop transitions, 72 changer transitions 5/663 dead transitions. [2023-08-24 08:01:21,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 663 transitions, 13456 flow [2023-08-24 08:01:21,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1466 transitions. [2023-08-24 08:01:21,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963233306299 [2023-08-24 08:01:21,610 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1466 transitions. [2023-08-24 08:01:21,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1466 transitions. [2023-08-24 08:01:21,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:21,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1466 transitions. [2023-08-24 08:01:21,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.88888888888889) internal successors, (1466), 9 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:21,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:21,614 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:21,614 INFO L175 Difference]: Start difference. First operand has 360 places, 620 transitions, 11710 flow. Second operand 9 states and 1466 transitions. [2023-08-24 08:01:21,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 663 transitions, 13456 flow [2023-08-24 08:01:21,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 663 transitions, 13180 flow, removed 15 selfloop flow, removed 11 redundant places. [2023-08-24 08:01:21,949 INFO L231 Difference]: Finished difference. Result has 360 places, 636 transitions, 11979 flow [2023-08-24 08:01:21,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=11438, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11979, PETRI_PLACES=360, PETRI_TRANSITIONS=636} [2023-08-24 08:01:21,949 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-24 08:01:21,949 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 636 transitions, 11979 flow [2023-08-24 08:01:21,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.23529411764707) internal successors, (2707), 17 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:21,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:21,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:21,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-24 08:01:22,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:22,151 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:22,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -154153860, now seen corresponding path program 38 times [2023-08-24 08:01:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:22,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367393909] [2023-08-24 08:01:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:22,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367393909] [2023-08-24 08:01:22,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367393909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:22,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092539163] [2023-08-24 08:01:22,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:22,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:22,470 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 08:01:22,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:22,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:22,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:22,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:22,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:22,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092539163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:22,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:22,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-24 08:01:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671414550] [2023-08-24 08:01:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:22,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:01:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:01:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:01:22,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:22,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 636 transitions, 11979 flow. Second operand has 19 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:22,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:22,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:22,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:23,595 INFO L124 PetriNetUnfolderBase]: 1303/2197 cut-off events. [2023-08-24 08:01:23,595 INFO L125 PetriNetUnfolderBase]: For 55078/55082 co-relation queries the response was YES. [2023-08-24 08:01:23,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20399 conditions, 2197 events. 1303/2197 cut-off events. For 55078/55082 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 12342 event pairs, 41 based on Foata normal form. 3/2194 useless extension candidates. Maximal degree in co-relation 20259. Up to 1930 conditions per place. [2023-08-24 08:01:23,618 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 584 selfloop transitions, 87 changer transitions 9/690 dead transitions. [2023-08-24 08:01:23,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 690 transitions, 13940 flow [2023-08-24 08:01:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1473 transitions. [2023-08-24 08:01:23,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982157339821573 [2023-08-24 08:01:23,620 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1473 transitions. [2023-08-24 08:01:23,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1473 transitions. [2023-08-24 08:01:23,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:23,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1473 transitions. [2023-08-24 08:01:23,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.66666666666666) internal successors, (1473), 9 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:23,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:23,623 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:23,623 INFO L175 Difference]: Start difference. First operand has 360 places, 636 transitions, 11979 flow. Second operand 9 states and 1473 transitions. [2023-08-24 08:01:23,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 690 transitions, 13940 flow [2023-08-24 08:01:24,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 690 transitions, 13659 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:24,080 INFO L231 Difference]: Finished difference. Result has 365 places, 651 transitions, 12234 flow [2023-08-24 08:01:24,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=11704, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12234, PETRI_PLACES=365, PETRI_TRANSITIONS=651} [2023-08-24 08:01:24,081 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 345 predicate places. [2023-08-24 08:01:24,081 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 651 transitions, 12234 flow [2023-08-24 08:01:24,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:24,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:24,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:24,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 08:01:24,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:24,284 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:24,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -270655890, now seen corresponding path program 39 times [2023-08-24 08:01:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855181508] [2023-08-24 08:01:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:24,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:24,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855181508] [2023-08-24 08:01:24,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855181508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:24,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899421869] [2023-08-24 08:01:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:24,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:24,601 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:24,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 08:01:24,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:24,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:24,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:24,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:25,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899421869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:25,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-24 08:01:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625394743] [2023-08-24 08:01:25,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:01:25,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:01:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:01:25,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:25,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 651 transitions, 12234 flow. Second operand has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:25,787 INFO L124 PetriNetUnfolderBase]: 1296/2180 cut-off events. [2023-08-24 08:01:25,787 INFO L125 PetriNetUnfolderBase]: For 52754/52758 co-relation queries the response was YES. [2023-08-24 08:01:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 2180 events. 1296/2180 cut-off events. For 52754/52758 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 12182 event pairs, 42 based on Foata normal form. 3/2177 useless extension candidates. Maximal degree in co-relation 20022. Up to 1930 conditions per place. [2023-08-24 08:01:25,810 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 578 selfloop transitions, 86 changer transitions 6/680 dead transitions. [2023-08-24 08:01:25,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 680 transitions, 13742 flow [2023-08-24 08:01:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:01:25,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:01:25,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1310 transitions. [2023-08-24 08:01:25,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984184914841849 [2023-08-24 08:01:25,811 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1310 transitions. [2023-08-24 08:01:25,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1310 transitions. [2023-08-24 08:01:25,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:25,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1310 transitions. [2023-08-24 08:01:25,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:25,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:25,815 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 411.0) internal successors, (3699), 9 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:25,815 INFO L175 Difference]: Start difference. First operand has 365 places, 651 transitions, 12234 flow. Second operand 8 states and 1310 transitions. [2023-08-24 08:01:25,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 680 transitions, 13742 flow [2023-08-24 08:01:26,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 680 transitions, 13498 flow, removed 54 selfloop flow, removed 6 redundant places. [2023-08-24 08:01:26,167 INFO L231 Difference]: Finished difference. Result has 367 places, 653 transitions, 12275 flow [2023-08-24 08:01:26,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=11994, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12275, PETRI_PLACES=367, PETRI_TRANSITIONS=653} [2023-08-24 08:01:26,168 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2023-08-24 08:01:26,168 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 653 transitions, 12275 flow [2023-08-24 08:01:26,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.0) internal successors, (3021), 19 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:26,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:26,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:26,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:26,369 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,SelfDestructingSolverStorable52 [2023-08-24 08:01:26,369 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:26,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1274452296, now seen corresponding path program 40 times [2023-08-24 08:01:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:26,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606155926] [2023-08-24 08:01:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:26,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606155926] [2023-08-24 08:01:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606155926] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830780648] [2023-08-24 08:01:26,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:01:26,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:26,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:26,702 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:26,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 08:01:26,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:01:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:26,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:26,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:26,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:27,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830780648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:27,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:27,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 08:01:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323725989] [2023-08-24 08:01:27,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:01:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:01:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:01:27,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:27,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 653 transitions, 12275 flow. Second operand has 18 states, 18 states have (on average 159.11111111111111) internal successors, (2864), 18 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:27,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:27,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:27,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:28,101 INFO L124 PetriNetUnfolderBase]: 1458/2503 cut-off events. [2023-08-24 08:01:28,101 INFO L125 PetriNetUnfolderBase]: For 64340/64344 co-relation queries the response was YES. [2023-08-24 08:01:28,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23206 conditions, 2503 events. 1458/2503 cut-off events. For 64340/64344 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 14842 event pairs, 51 based on Foata normal form. 4/2501 useless extension candidates. Maximal degree in co-relation 23063. Up to 2104 conditions per place. [2023-08-24 08:01:28,126 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 645 selfloop transitions, 114 changer transitions 25/794 dead transitions. [2023-08-24 08:01:28,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 794 transitions, 16093 flow [2023-08-24 08:01:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:01:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:01:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1964 transitions. [2023-08-24 08:01:28,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982157339821573 [2023-08-24 08:01:28,128 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1964 transitions. [2023-08-24 08:01:28,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1964 transitions. [2023-08-24 08:01:28,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:28,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1964 transitions. [2023-08-24 08:01:28,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.66666666666666) internal successors, (1964), 12 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:28,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:28,133 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:28,133 INFO L175 Difference]: Start difference. First operand has 367 places, 653 transitions, 12275 flow. Second operand 12 states and 1964 transitions. [2023-08-24 08:01:28,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 794 transitions, 16093 flow [2023-08-24 08:01:28,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 794 transitions, 15901 flow, removed 29 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:28,557 INFO L231 Difference]: Finished difference. Result has 382 places, 719 transitions, 13909 flow [2023-08-24 08:01:28,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=12093, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13909, PETRI_PLACES=382, PETRI_TRANSITIONS=719} [2023-08-24 08:01:28,557 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 362 predicate places. [2023-08-24 08:01:28,557 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 719 transitions, 13909 flow [2023-08-24 08:01:28,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 159.11111111111111) internal successors, (2864), 18 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:28,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:28,558 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:28,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-24 08:01:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:28,758 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:28,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash 436755658, now seen corresponding path program 41 times [2023-08-24 08:01:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:28,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548223184] [2023-08-24 08:01:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:28,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:29,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:29,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548223184] [2023-08-24 08:01:29,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548223184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:29,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19166762] [2023-08-24 08:01:29,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:01:29,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:29,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:29,121 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:29,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 08:01:29,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:01:29,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:29,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:29,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:29,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:29,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19166762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:29,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:29,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 08:01:29,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188117674] [2023-08-24 08:01:29,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:29,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:01:29,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:29,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:01:29,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:01:29,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:29,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 719 transitions, 13909 flow. Second operand has 20 states, 20 states have (on average 159.0) internal successors, (3180), 20 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:29,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:29,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:29,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:30,481 INFO L124 PetriNetUnfolderBase]: 1464/2514 cut-off events. [2023-08-24 08:01:30,481 INFO L125 PetriNetUnfolderBase]: For 72195/72199 co-relation queries the response was YES. [2023-08-24 08:01:30,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24079 conditions, 2514 events. 1464/2514 cut-off events. For 72195/72199 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 14886 event pairs, 58 based on Foata normal form. 3/2511 useless extension candidates. Maximal degree in co-relation 23927. Up to 2098 conditions per place. [2023-08-24 08:01:30,510 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 662 selfloop transitions, 113 changer transitions 5/790 dead transitions. [2023-08-24 08:01:30,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 790 transitions, 16576 flow [2023-08-24 08:01:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:01:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:01:30,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1644 transitions. [2023-08-24 08:01:30,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-24 08:01:30,511 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1644 transitions. [2023-08-24 08:01:30,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1644 transitions. [2023-08-24 08:01:30,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:30,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1644 transitions. [2023-08-24 08:01:30,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 164.4) internal successors, (1644), 10 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:30,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:30,514 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:30,515 INFO L175 Difference]: Start difference. First operand has 382 places, 719 transitions, 13909 flow. Second operand 10 states and 1644 transitions. [2023-08-24 08:01:30,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 790 transitions, 16576 flow [2023-08-24 08:01:30,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 790 transitions, 16078 flow, removed 249 selfloop flow, removed 2 redundant places. [2023-08-24 08:01:30,992 INFO L231 Difference]: Finished difference. Result has 390 places, 732 transitions, 14127 flow [2023-08-24 08:01:30,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=13437, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14127, PETRI_PLACES=390, PETRI_TRANSITIONS=732} [2023-08-24 08:01:30,993 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 370 predicate places. [2023-08-24 08:01:30,993 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 732 transitions, 14127 flow [2023-08-24 08:01:30,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 159.0) internal successors, (3180), 20 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:30,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:30,993 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:30,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-24 08:01:31,193 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,SelfDestructingSolverStorable54 [2023-08-24 08:01:31,194 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:31,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash 197943246, now seen corresponding path program 42 times [2023-08-24 08:01:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657149914] [2023-08-24 08:01:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657149914] [2023-08-24 08:01:31,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657149914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091855071] [2023-08-24 08:01:31,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:31,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:31,469 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:31,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 08:01:31,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:01:31,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:31,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:31,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:31,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:31,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091855071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:31,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:31,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 08:01:31,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671612660] [2023-08-24 08:01:31,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:31,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:01:31,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:31,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:01:31,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:01:31,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:31,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 732 transitions, 14127 flow. Second operand has 17 states, 17 states have (on average 159.05882352941177) internal successors, (2704), 17 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:31,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:31,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:31,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:32,795 INFO L124 PetriNetUnfolderBase]: 1463/2506 cut-off events. [2023-08-24 08:01:32,796 INFO L125 PetriNetUnfolderBase]: For 68061/68065 co-relation queries the response was YES. [2023-08-24 08:01:32,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23650 conditions, 2506 events. 1463/2506 cut-off events. For 68061/68065 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 14798 event pairs, 55 based on Foata normal form. 4/2504 useless extension candidates. Maximal degree in co-relation 23496. Up to 2098 conditions per place. [2023-08-24 08:01:32,825 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 651 selfloop transitions, 110 changer transitions 14/785 dead transitions. [2023-08-24 08:01:32,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 785 transitions, 16293 flow [2023-08-24 08:01:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:01:32,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:01:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1799 transitions. [2023-08-24 08:01:32,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39792081397920814 [2023-08-24 08:01:32,827 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1799 transitions. [2023-08-24 08:01:32,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1799 transitions. [2023-08-24 08:01:32,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:32,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1799 transitions. [2023-08-24 08:01:32,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 163.54545454545453) internal successors, (1799), 11 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:32,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:32,831 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:32,831 INFO L175 Difference]: Start difference. First operand has 390 places, 732 transitions, 14127 flow. Second operand 11 states and 1799 transitions. [2023-08-24 08:01:32,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 785 transitions, 16293 flow [2023-08-24 08:01:33,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 785 transitions, 15947 flow, removed 115 selfloop flow, removed 4 redundant places. [2023-08-24 08:01:33,346 INFO L231 Difference]: Finished difference. Result has 399 places, 730 transitions, 14061 flow [2023-08-24 08:01:33,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=13789, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14061, PETRI_PLACES=399, PETRI_TRANSITIONS=730} [2023-08-24 08:01:33,347 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-08-24 08:01:33,347 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 730 transitions, 14061 flow [2023-08-24 08:01:33,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.05882352941177) internal successors, (2704), 17 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:33,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:33,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:33,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-08-24 08:01:33,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:33,548 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:33,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1406697782, now seen corresponding path program 43 times [2023-08-24 08:01:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:33,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042975552] [2023-08-24 08:01:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:33,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:33,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042975552] [2023-08-24 08:01:33,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042975552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:33,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289991323] [2023-08-24 08:01:33,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:01:33,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:33,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:33,863 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:33,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 08:01:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:33,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:33,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:34,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:34,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289991323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:34,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:34,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-08-24 08:01:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001585790] [2023-08-24 08:01:34,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:34,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:01:34,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:34,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:01:34,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:01:34,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:34,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 730 transitions, 14061 flow. Second operand has 17 states, 17 states have (on average 159.11764705882354) internal successors, (2705), 17 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:34,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:34,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:34,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:35,160 INFO L124 PetriNetUnfolderBase]: 1487/2553 cut-off events. [2023-08-24 08:01:35,160 INFO L125 PetriNetUnfolderBase]: For 70370/70374 co-relation queries the response was YES. [2023-08-24 08:01:35,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24193 conditions, 2553 events. 1487/2553 cut-off events. For 70370/70374 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 15145 event pairs, 53 based on Foata normal form. 3/2550 useless extension candidates. Maximal degree in co-relation 24035. Up to 2336 conditions per place. [2023-08-24 08:01:35,191 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 689 selfloop transitions, 73 changer transitions 5/777 dead transitions. [2023-08-24 08:01:35,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 777 transitions, 16178 flow [2023-08-24 08:01:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1467 transitions. [2023-08-24 08:01:35,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39659367396593675 [2023-08-24 08:01:35,193 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1467 transitions. [2023-08-24 08:01:35,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1467 transitions. [2023-08-24 08:01:35,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:35,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1467 transitions. [2023-08-24 08:01:35,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.0) internal successors, (1467), 9 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:35,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:35,196 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:35,196 INFO L175 Difference]: Start difference. First operand has 399 places, 730 transitions, 14061 flow. Second operand 9 states and 1467 transitions. [2023-08-24 08:01:35,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 777 transitions, 16178 flow [2023-08-24 08:01:35,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 777 transitions, 15835 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-24 08:01:35,685 INFO L231 Difference]: Finished difference. Result has 401 places, 748 transitions, 14383 flow [2023-08-24 08:01:35,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=13730, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14383, PETRI_PLACES=401, PETRI_TRANSITIONS=748} [2023-08-24 08:01:35,685 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 381 predicate places. [2023-08-24 08:01:35,685 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 748 transitions, 14383 flow [2023-08-24 08:01:35,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 159.11764705882354) internal successors, (2705), 17 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:35,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:35,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:35,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-24 08:01:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:35,886 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:35,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:35,887 INFO L85 PathProgramCache]: Analyzing trace with hash -161646900, now seen corresponding path program 44 times [2023-08-24 08:01:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738020822] [2023-08-24 08:01:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:36,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738020822] [2023-08-24 08:01:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738020822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434332487] [2023-08-24 08:01:36,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:36,175 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:36,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 08:01:36,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:36,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:36,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:36,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:36,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434332487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:36,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:36,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-08-24 08:01:36,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402742233] [2023-08-24 08:01:36,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:36,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:01:36,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:36,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:01:36,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:01:36,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:36,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 748 transitions, 14383 flow. Second operand has 18 states, 18 states have (on average 159.05555555555554) internal successors, (2863), 18 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:36,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:36,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:36,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:37,427 INFO L124 PetriNetUnfolderBase]: 1536/2632 cut-off events. [2023-08-24 08:01:37,427 INFO L125 PetriNetUnfolderBase]: For 73031/73035 co-relation queries the response was YES. [2023-08-24 08:01:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24899 conditions, 2632 events. 1536/2632 cut-off events. For 73031/73035 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 15659 event pairs, 53 based on Foata normal form. 3/2629 useless extension candidates. Maximal degree in co-relation 24739. Up to 2345 conditions per place. [2023-08-24 08:01:37,459 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 699 selfloop transitions, 93 changer transitions 7/809 dead transitions. [2023-08-24 08:01:37,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 809 transitions, 16786 flow [2023-08-24 08:01:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2023-08-24 08:01:37,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39848607731819413 [2023-08-24 08:01:37,461 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2023-08-24 08:01:37,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2023-08-24 08:01:37,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:37,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2023-08-24 08:01:37,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:37,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:37,464 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:37,464 INFO L175 Difference]: Start difference. First operand has 401 places, 748 transitions, 14383 flow. Second operand 9 states and 1474 transitions. [2023-08-24 08:01:37,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 809 transitions, 16786 flow [2023-08-24 08:01:37,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 809 transitions, 16468 flow, removed 111 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:38,002 INFO L231 Difference]: Finished difference. Result has 406 places, 769 transitions, 14824 flow [2023-08-24 08:01:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=14071, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14824, PETRI_PLACES=406, PETRI_TRANSITIONS=769} [2023-08-24 08:01:38,003 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 386 predicate places. [2023-08-24 08:01:38,003 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 769 transitions, 14824 flow [2023-08-24 08:01:38,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 159.05555555555554) internal successors, (2863), 18 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:38,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:38,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:38,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 08:01:38,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-24 08:01:38,204 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:38,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:38,204 INFO L85 PathProgramCache]: Analyzing trace with hash -45144870, now seen corresponding path program 45 times [2023-08-24 08:01:38,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:38,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866611798] [2023-08-24 08:01:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866611798] [2023-08-24 08:01:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866611798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082441528] [2023-08-24 08:01:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:38,511 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:38,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 08:01:38,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:38,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:38,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:38,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082441528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:38,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-08-24 08:01:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409178266] [2023-08-24 08:01:38,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:01:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:01:38,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:01:38,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:38,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 769 transitions, 14824 flow. Second operand has 19 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:38,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:38,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:39,953 INFO L124 PetriNetUnfolderBase]: 1528/2614 cut-off events. [2023-08-24 08:01:39,953 INFO L125 PetriNetUnfolderBase]: For 68465/68469 co-relation queries the response was YES. [2023-08-24 08:01:39,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24566 conditions, 2614 events. 1528/2614 cut-off events. For 68465/68469 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 15498 event pairs, 46 based on Foata normal form. 3/2611 useless extension candidates. Maximal degree in co-relation 24404. Up to 2345 conditions per place. [2023-08-24 08:01:39,979 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 696 selfloop transitions, 90 changer transitions 7/803 dead transitions. [2023-08-24 08:01:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 803 transitions, 16646 flow [2023-08-24 08:01:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:01:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:01:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1631 transitions. [2023-08-24 08:01:39,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39683698296836983 [2023-08-24 08:01:39,980 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1631 transitions. [2023-08-24 08:01:39,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1631 transitions. [2023-08-24 08:01:39,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:39,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1631 transitions. [2023-08-24 08:01:39,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 163.1) internal successors, (1631), 10 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:39,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:39,983 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 411.0) internal successors, (4521), 11 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:39,984 INFO L175 Difference]: Start difference. First operand has 406 places, 769 transitions, 14824 flow. Second operand 10 states and 1631 transitions. [2023-08-24 08:01:39,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 803 transitions, 16646 flow [2023-08-24 08:01:40,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 803 transitions, 16390 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:40,446 INFO L231 Difference]: Finished difference. Result has 411 places, 771 transitions, 14850 flow [2023-08-24 08:01:40,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=14572, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=769, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14850, PETRI_PLACES=411, PETRI_TRANSITIONS=771} [2023-08-24 08:01:40,446 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 391 predicate places. [2023-08-24 08:01:40,446 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 771 transitions, 14850 flow [2023-08-24 08:01:40,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 159.10526315789474) internal successors, (3023), 19 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:40,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:40,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:40,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:40,647 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,SelfDestructingSolverStorable58 [2023-08-24 08:01:40,648 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:40,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1390365596, now seen corresponding path program 46 times [2023-08-24 08:01:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:40,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189000431] [2023-08-24 08:01:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:40,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189000431] [2023-08-24 08:01:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189000431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912663028] [2023-08-24 08:01:40,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:01:40,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:40,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:41,001 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:41,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 08:01:41,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:01:41,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:41,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:01:41,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:41,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912663028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:41,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:41,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 08:01:41,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435400544] [2023-08-24 08:01:41,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:01:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:41,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:01:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:01:41,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:01:41,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 771 transitions, 14850 flow. Second operand has 16 states, 16 states have (on average 159.25) internal successors, (2548), 16 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:41,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:41,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:01:41,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:42,315 INFO L124 PetriNetUnfolderBase]: 1523/2603 cut-off events. [2023-08-24 08:01:42,315 INFO L125 PetriNetUnfolderBase]: For 66616/66620 co-relation queries the response was YES. [2023-08-24 08:01:42,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24411 conditions, 2603 events. 1523/2603 cut-off events. For 66616/66620 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 15422 event pairs, 53 based on Foata normal form. 3/2600 useless extension candidates. Maximal degree in co-relation 24248. Up to 2348 conditions per place. [2023-08-24 08:01:42,344 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 709 selfloop transitions, 92 changer transitions 5/816 dead transitions. [2023-08-24 08:01:42,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 816 transitions, 16905 flow [2023-08-24 08:01:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:01:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:01:42,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1791 transitions. [2023-08-24 08:01:42,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39615129396151294 [2023-08-24 08:01:42,346 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1791 transitions. [2023-08-24 08:01:42,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1791 transitions. [2023-08-24 08:01:42,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:42,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1791 transitions. [2023-08-24 08:01:42,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 162.8181818181818) internal successors, (1791), 11 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:42,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:42,349 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 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) [2023-08-24 08:01:42,349 INFO L175 Difference]: Start difference. First operand has 411 places, 771 transitions, 14850 flow. Second operand 11 states and 1791 transitions. [2023-08-24 08:01:42,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 816 transitions, 16905 flow [2023-08-24 08:01:42,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 816 transitions, 16749 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-24 08:01:42,844 INFO L231 Difference]: Finished difference. Result has 418 places, 780 transitions, 15167 flow [2023-08-24 08:01:42,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=14700, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15167, PETRI_PLACES=418, PETRI_TRANSITIONS=780} [2023-08-24 08:01:42,844 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 398 predicate places. [2023-08-24 08:01:42,845 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 780 transitions, 15167 flow [2023-08-24 08:01:42,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 159.25) internal successors, (2548), 16 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:42,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:42,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-24 08:01:43,046 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,SelfDestructingSolverStorable59 [2023-08-24 08:01:43,047 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:43,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash -88160114, now seen corresponding path program 47 times [2023-08-24 08:01:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614997823] [2023-08-24 08:01:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614997823] [2023-08-24 08:01:43,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614997823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:43,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141839515] [2023-08-24 08:01:43,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:01:43,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:43,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:43,137 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:01:43,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 08:01:43,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:01:43,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:43,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:43,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:43,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141839515] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:43,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 08:01:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840922536] [2023-08-24 08:01:43,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:43,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:01:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:01:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:01:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 780 transitions, 15167 flow. Second operand has 14 states, 14 states have (on average 168.92857142857142) internal successors, (2365), 14 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:43,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:44,504 INFO L124 PetriNetUnfolderBase]: 2062/3537 cut-off events. [2023-08-24 08:01:44,504 INFO L125 PetriNetUnfolderBase]: For 98189/98189 co-relation queries the response was YES. [2023-08-24 08:01:44,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32831 conditions, 3537 events. 2062/3537 cut-off events. For 98189/98189 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 21888 event pairs, 125 based on Foata normal form. 14/3551 useless extension candidates. Maximal degree in co-relation 32666. Up to 1047 conditions per place. [2023-08-24 08:01:44,547 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 653 selfloop transitions, 428 changer transitions 0/1081 dead transitions. [2023-08-24 08:01:44,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1081 transitions, 22773 flow [2023-08-24 08:01:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:01:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:01:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2250 transitions. [2023-08-24 08:01:44,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211117349803481 [2023-08-24 08:01:44,549 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2250 transitions. [2023-08-24 08:01:44,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2250 transitions. [2023-08-24 08:01:44,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:44,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2250 transitions. [2023-08-24 08:01:44,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.07692307692307) internal successors, (2250), 13 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:44,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:44,555 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:44,556 INFO L175 Difference]: Start difference. First operand has 418 places, 780 transitions, 15167 flow. Second operand 13 states and 2250 transitions. [2023-08-24 08:01:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1081 transitions, 22773 flow [2023-08-24 08:01:45,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1081 transitions, 22418 flow, removed 103 selfloop flow, removed 6 redundant places. [2023-08-24 08:01:45,333 INFO L231 Difference]: Finished difference. Result has 432 places, 936 transitions, 19767 flow [2023-08-24 08:01:45,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=14939, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19767, PETRI_PLACES=432, PETRI_TRANSITIONS=936} [2023-08-24 08:01:45,334 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 412 predicate places. [2023-08-24 08:01:45,334 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 936 transitions, 19767 flow [2023-08-24 08:01:45,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 168.92857142857142) internal successors, (2365), 14 states have internal predecessors, (2365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:45,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:45,334 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:45,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-08-24 08:01:45,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:45,535 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:45,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:45,535 INFO L85 PathProgramCache]: Analyzing trace with hash 946531917, now seen corresponding path program 48 times [2023-08-24 08:01:45,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:45,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998791703] [2023-08-24 08:01:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998791703] [2023-08-24 08:01:45,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998791703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:45,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328398364] [2023-08-24 08:01:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:01:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:45,599 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) [2023-08-24 08:01:45,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 08:01:45,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:01:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:45,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:45,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:45,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328398364] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:45,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:45,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 08:01:45,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284615091] [2023-08-24 08:01:45,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:45,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:01:45,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:45,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:01:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:01:45,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:45,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 936 transitions, 19767 flow. Second operand has 14 states, 14 states have (on average 169.07142857142858) internal successors, (2367), 14 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:45,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:45,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:45,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:47,057 INFO L124 PetriNetUnfolderBase]: 2067/3554 cut-off events. [2023-08-24 08:01:47,057 INFO L125 PetriNetUnfolderBase]: For 110029/110029 co-relation queries the response was YES. [2023-08-24 08:01:47,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34510 conditions, 3554 events. 2067/3554 cut-off events. For 110029/110029 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22122 event pairs, 388 based on Foata normal form. 4/3558 useless extension candidates. Maximal degree in co-relation 34337. Up to 2254 conditions per place. [2023-08-24 08:01:47,103 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 801 selfloop transitions, 246 changer transitions 15/1062 dead transitions. [2023-08-24 08:01:47,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1062 transitions, 23917 flow [2023-08-24 08:01:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:01:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:01:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1562 transitions. [2023-08-24 08:01:47,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222762908894296 [2023-08-24 08:01:47,105 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1562 transitions. [2023-08-24 08:01:47,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1562 transitions. [2023-08-24 08:01:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:47,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1562 transitions. [2023-08-24 08:01:47,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.55555555555554) internal successors, (1562), 9 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:47,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:47,108 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:47,108 INFO L175 Difference]: Start difference. First operand has 432 places, 936 transitions, 19767 flow. Second operand 9 states and 1562 transitions. [2023-08-24 08:01:47,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1062 transitions, 23917 flow [2023-08-24 08:01:47,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1062 transitions, 23480 flow, removed 128 selfloop flow, removed 3 redundant places. [2023-08-24 08:01:47,886 INFO L231 Difference]: Finished difference. Result has 440 places, 934 transitions, 19785 flow [2023-08-24 08:01:47,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=19330, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19785, PETRI_PLACES=440, PETRI_TRANSITIONS=934} [2023-08-24 08:01:47,887 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 420 predicate places. [2023-08-24 08:01:47,887 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 934 transitions, 19785 flow [2023-08-24 08:01:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 169.07142857142858) internal successors, (2367), 14 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:47,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:47,887 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:47,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:48,088 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,SelfDestructingSolverStorable61 [2023-08-24 08:01:48,088 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:48,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:48,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1412379026, now seen corresponding path program 49 times [2023-08-24 08:01:48,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:48,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468622724] [2023-08-24 08:01:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:48,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468622724] [2023-08-24 08:01:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468622724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:48,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099906236] [2023-08-24 08:01:48,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:01:48,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:48,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:48,177 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) [2023-08-24 08:01:48,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 08:01:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:48,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:48,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:48,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:48,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099906236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:48,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:48,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:01:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598352557] [2023-08-24 08:01:48,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:01:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:01:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:01:48,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:48,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 934 transitions, 19785 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:48,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:48,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:48,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:49,870 INFO L124 PetriNetUnfolderBase]: 2240/3821 cut-off events. [2023-08-24 08:01:49,871 INFO L125 PetriNetUnfolderBase]: For 129931/129931 co-relation queries the response was YES. [2023-08-24 08:01:49,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38022 conditions, 3821 events. 2240/3821 cut-off events. For 129931/129931 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24013 event pairs, 171 based on Foata normal form. 28/3849 useless extension candidates. Maximal degree in co-relation 37846. Up to 1319 conditions per place. [2023-08-24 08:01:49,920 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 541 selfloop transitions, 531 changer transitions 0/1072 dead transitions. [2023-08-24 08:01:49,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1072 transitions, 24869 flow [2023-08-24 08:01:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:01:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:01:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4125 transitions. [2023-08-24 08:01:49,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818734793187345 [2023-08-24 08:01:49,923 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4125 transitions. [2023-08-24 08:01:49,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4125 transitions. [2023-08-24 08:01:49,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:49,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4125 transitions. [2023-08-24 08:01:49,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 171.875) internal successors, (4125), 24 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:49,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:49,930 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:49,930 INFO L175 Difference]: Start difference. First operand has 440 places, 934 transitions, 19785 flow. Second operand 24 states and 4125 transitions. [2023-08-24 08:01:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1072 transitions, 24869 flow [2023-08-24 08:01:50,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1072 transitions, 24480 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 08:01:50,855 INFO L231 Difference]: Finished difference. Result has 459 places, 1027 transitions, 23578 flow [2023-08-24 08:01:50,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=19423, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23578, PETRI_PLACES=459, PETRI_TRANSITIONS=1027} [2023-08-24 08:01:50,856 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 439 predicate places. [2023-08-24 08:01:50,856 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1027 transitions, 23578 flow [2023-08-24 08:01:50,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:50,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:50,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:50,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:51,057 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 [2023-08-24 08:01:51,057 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:51,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1394724480, now seen corresponding path program 50 times [2023-08-24 08:01:51,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:51,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119329279] [2023-08-24 08:01:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119329279] [2023-08-24 08:01:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119329279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065685924] [2023-08-24 08:01:51,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:01:51,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:51,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:51,139 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) [2023-08-24 08:01:51,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 08:01:51,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:01:51,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:51,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:51,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:51,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:51,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065685924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:51,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:51,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:01:51,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880407773] [2023-08-24 08:01:51,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:51,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:01:51,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:01:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:01:51,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:51,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1027 transitions, 23578 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:51,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:51,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:51,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:52,920 INFO L124 PetriNetUnfolderBase]: 2238/3827 cut-off events. [2023-08-24 08:01:52,920 INFO L125 PetriNetUnfolderBase]: For 133284/133284 co-relation queries the response was YES. [2023-08-24 08:01:52,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39798 conditions, 3827 events. 2238/3827 cut-off events. For 133284/133284 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 24269 event pairs, 269 based on Foata normal form. 8/3835 useless extension candidates. Maximal degree in co-relation 39620. Up to 1671 conditions per place. [2023-08-24 08:01:52,963 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 597 selfloop transitions, 463 changer transitions 4/1064 dead transitions. [2023-08-24 08:01:52,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1064 transitions, 25979 flow [2023-08-24 08:01:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:01:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:01:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3261 transitions. [2023-08-24 08:01:52,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41759508259700345 [2023-08-24 08:01:52,967 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3261 transitions. [2023-08-24 08:01:52,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3261 transitions. [2023-08-24 08:01:52,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:52,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3261 transitions. [2023-08-24 08:01:52,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.6315789473684) internal successors, (3261), 19 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:52,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:01:52,974 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:01:52,974 INFO L175 Difference]: Start difference. First operand has 459 places, 1027 transitions, 23578 flow. Second operand 19 states and 3261 transitions. [2023-08-24 08:01:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1064 transitions, 25979 flow [2023-08-24 08:01:53,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1064 transitions, 24054 flow, removed 729 selfloop flow, removed 11 redundant places. [2023-08-24 08:01:53,889 INFO L231 Difference]: Finished difference. Result has 468 places, 1025 transitions, 22608 flow [2023-08-24 08:01:53,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=21654, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=22608, PETRI_PLACES=468, PETRI_TRANSITIONS=1025} [2023-08-24 08:01:53,890 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 448 predicate places. [2023-08-24 08:01:53,891 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1025 transitions, 22608 flow [2023-08-24 08:01:53,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:53,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:53,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:53,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:54,093 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 [2023-08-24 08:01:54,093 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:54,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash -962729083, now seen corresponding path program 51 times [2023-08-24 08:01:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:54,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431372940] [2023-08-24 08:01:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:54,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:54,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:54,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431372940] [2023-08-24 08:01:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431372940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:54,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098126216] [2023-08-24 08:01:54,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:01:54,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:54,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:54,162 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) [2023-08-24 08:01:54,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 08:01:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:01:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:54,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:54,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:54,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:54,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098126216] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:54,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:01:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444305820] [2023-08-24 08:01:54,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:54,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:01:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:54,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:01:54,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:01:54,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:54,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1025 transitions, 22608 flow. Second operand has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:54,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:54,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:54,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:55,771 INFO L124 PetriNetUnfolderBase]: 2262/3879 cut-off events. [2023-08-24 08:01:55,771 INFO L125 PetriNetUnfolderBase]: For 114777/114777 co-relation queries the response was YES. [2023-08-24 08:01:55,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 3879 events. 2262/3879 cut-off events. For 114777/114777 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 24659 event pairs, 443 based on Foata normal form. 16/3895 useless extension candidates. Maximal degree in co-relation 38344. Up to 2793 conditions per place. [2023-08-24 08:01:55,818 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 839 selfloop transitions, 300 changer transitions 12/1151 dead transitions. [2023-08-24 08:01:55,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1151 transitions, 27219 flow [2023-08-24 08:01:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:01:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:01:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2584 transitions. [2023-08-24 08:01:55,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191403081914031 [2023-08-24 08:01:55,820 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2584 transitions. [2023-08-24 08:01:55,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2584 transitions. [2023-08-24 08:01:55,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:55,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2584 transitions. [2023-08-24 08:01:55,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 172.26666666666668) internal successors, (2584), 15 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:55,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 411.0) internal successors, (6576), 16 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) [2023-08-24 08:01:55,825 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 411.0) internal successors, (6576), 16 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) [2023-08-24 08:01:55,825 INFO L175 Difference]: Start difference. First operand has 468 places, 1025 transitions, 22608 flow. Second operand 15 states and 2584 transitions. [2023-08-24 08:01:55,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1151 transitions, 27219 flow [2023-08-24 08:01:56,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1151 transitions, 26104 flow, removed 51 selfloop flow, removed 18 redundant places. [2023-08-24 08:01:56,741 INFO L231 Difference]: Finished difference. Result has 467 places, 1049 transitions, 22959 flow [2023-08-24 08:01:56,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=21497, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22959, PETRI_PLACES=467, PETRI_TRANSITIONS=1049} [2023-08-24 08:01:56,742 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 447 predicate places. [2023-08-24 08:01:56,742 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 1049 transitions, 22959 flow [2023-08-24 08:01:56,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 169.0) internal successors, (2704), 16 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:56,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:56,742 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:56,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:56,942 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 [2023-08-24 08:01:56,943 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:56,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:56,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1284654128, now seen corresponding path program 52 times [2023-08-24 08:01:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:56,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089955098] [2023-08-24 08:01:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:01:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:57,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:01:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089955098] [2023-08-24 08:01:57,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089955098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:01:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431889969] [2023-08-24 08:01:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:01:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:01:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:01:57,008 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) [2023-08-24 08:01:57,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 08:01:57,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:01:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:01:57,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:01:57,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:01:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:57,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:01:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:01:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431889969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:01:57,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:01:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:01:57,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368803797] [2023-08-24 08:01:57,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:01:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:01:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:01:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:01:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:01:57,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:01:57,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 1049 transitions, 22959 flow. Second operand has 15 states, 15 states have (on average 169.06666666666666) internal successors, (2536), 15 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:57,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:01:57,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:01:57,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:01:58,789 INFO L124 PetriNetUnfolderBase]: 2328/3989 cut-off events. [2023-08-24 08:01:58,789 INFO L125 PetriNetUnfolderBase]: For 116341/116341 co-relation queries the response was YES. [2023-08-24 08:01:58,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39312 conditions, 3989 events. 2328/3989 cut-off events. For 116341/116341 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25436 event pairs, 208 based on Foata normal form. 14/4003 useless extension candidates. Maximal degree in co-relation 39132. Up to 1508 conditions per place. [2023-08-24 08:01:58,843 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 666 selfloop transitions, 469 changer transitions 0/1135 dead transitions. [2023-08-24 08:01:58,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1135 transitions, 26241 flow [2023-08-24 08:01:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:01:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:01:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3608 transitions. [2023-08-24 08:01:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4180280384659947 [2023-08-24 08:01:58,846 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3608 transitions. [2023-08-24 08:01:58,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3608 transitions. [2023-08-24 08:01:58,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:01:58,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3608 transitions. [2023-08-24 08:01:58,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.8095238095238) internal successors, (3608), 21 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:58,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:58,852 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:58,852 INFO L175 Difference]: Start difference. First operand has 467 places, 1049 transitions, 22959 flow. Second operand 21 states and 3608 transitions. [2023-08-24 08:01:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1135 transitions, 26241 flow [2023-08-24 08:01:59,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1135 transitions, 25057 flow, removed 168 selfloop flow, removed 9 redundant places. [2023-08-24 08:01:59,747 INFO L231 Difference]: Finished difference. Result has 482 places, 1086 transitions, 23734 flow [2023-08-24 08:01:59,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=21785, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1049, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23734, PETRI_PLACES=482, PETRI_TRANSITIONS=1086} [2023-08-24 08:01:59,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 462 predicate places. [2023-08-24 08:01:59,748 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1086 transitions, 23734 flow [2023-08-24 08:01:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.06666666666666) internal successors, (2536), 15 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:01:59,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:01:59,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:01:59,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 08:01:59,954 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 [2023-08-24 08:01:59,954 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:01:59,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:01:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2024497938, now seen corresponding path program 53 times [2023-08-24 08:01:59,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:01:59,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653488766] [2023-08-24 08:01:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:01:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:01:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:00,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653488766] [2023-08-24 08:02:00,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653488766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:00,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086928700] [2023-08-24 08:02:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:02:00,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:00,034 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) [2023-08-24 08:02:00,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 08:02:00,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:02:00,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:00,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:00,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:00,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086928700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:00,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:00,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:02:00,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389311996] [2023-08-24 08:02:00,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:02:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:02:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:02:00,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:00,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1086 transitions, 23734 flow. Second operand has 16 states, 16 states have (on average 168.9375) internal successors, (2703), 16 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:00,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:00,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:00,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:01,968 INFO L124 PetriNetUnfolderBase]: 2399/4122 cut-off events. [2023-08-24 08:02:01,968 INFO L125 PetriNetUnfolderBase]: For 117679/117679 co-relation queries the response was YES. [2023-08-24 08:02:02,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40933 conditions, 4122 events. 2399/4122 cut-off events. For 117679/117679 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 26523 event pairs, 247 based on Foata normal form. 10/4132 useless extension candidates. Maximal degree in co-relation 40748. Up to 1679 conditions per place. [2023-08-24 08:02:02,015 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 747 selfloop transitions, 418 changer transitions 0/1165 dead transitions. [2023-08-24 08:02:02,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 1165 transitions, 27088 flow [2023-08-24 08:02:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:02:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:02:02,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3267 transitions. [2023-08-24 08:02:02,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183634268152132 [2023-08-24 08:02:02,017 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3267 transitions. [2023-08-24 08:02:02,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3267 transitions. [2023-08-24 08:02:02,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:02,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3267 transitions. [2023-08-24 08:02:02,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.94736842105263) internal successors, (3267), 19 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:02,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:02:02,023 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:02:02,023 INFO L175 Difference]: Start difference. First operand has 482 places, 1086 transitions, 23734 flow. Second operand 19 states and 3267 transitions. [2023-08-24 08:02:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 1165 transitions, 27088 flow [2023-08-24 08:02:02,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1165 transitions, 26629 flow, removed 121 selfloop flow, removed 9 redundant places. [2023-08-24 08:02:02,898 INFO L231 Difference]: Finished difference. Result has 495 places, 1114 transitions, 24971 flow [2023-08-24 08:02:02,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=23377, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24971, PETRI_PLACES=495, PETRI_TRANSITIONS=1114} [2023-08-24 08:02:02,898 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 475 predicate places. [2023-08-24 08:02:02,899 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1114 transitions, 24971 flow [2023-08-24 08:02:02,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.9375) internal successors, (2703), 16 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:02,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:02,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:02,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:03,099 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 [2023-08-24 08:02:03,100 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:03,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:03,100 INFO L85 PathProgramCache]: Analyzing trace with hash 164961733, now seen corresponding path program 54 times [2023-08-24 08:02:03,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:03,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491755997] [2023-08-24 08:02:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:03,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491755997] [2023-08-24 08:02:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491755997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266773893] [2023-08-24 08:02:03,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:02:03,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:03,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:03,168 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) [2023-08-24 08:02:03,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 08:02:03,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:02:03,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:03,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:03,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:03,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266773893] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:03,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:03,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:02:03,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750502013] [2023-08-24 08:02:03,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:03,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:02:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:03,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:02:03,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:02:03,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:03,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1114 transitions, 24971 flow. Second operand has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:03,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:03,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:03,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:05,187 INFO L124 PetriNetUnfolderBase]: 2574/4367 cut-off events. [2023-08-24 08:02:05,187 INFO L125 PetriNetUnfolderBase]: For 135761/135761 co-relation queries the response was YES. [2023-08-24 08:02:05,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45018 conditions, 4367 events. 2574/4367 cut-off events. For 135761/135761 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27922 event pairs, 473 based on Foata normal form. 28/4395 useless extension candidates. Maximal degree in co-relation 44828. Up to 3017 conditions per place. [2023-08-24 08:02:05,250 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 866 selfloop transitions, 426 changer transitions 15/1307 dead transitions. [2023-08-24 08:02:05,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1307 transitions, 31626 flow [2023-08-24 08:02:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:02:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:02:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2928 transitions. [2023-08-24 08:02:05,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41906397595534567 [2023-08-24 08:02:05,253 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2928 transitions. [2023-08-24 08:02:05,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2928 transitions. [2023-08-24 08:02:05,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:05,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2928 transitions. [2023-08-24 08:02:05,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 172.23529411764707) internal successors, (2928), 17 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:05,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:05,259 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:05,259 INFO L175 Difference]: Start difference. First operand has 495 places, 1114 transitions, 24971 flow. Second operand 17 states and 2928 transitions. [2023-08-24 08:02:05,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1307 transitions, 31626 flow [2023-08-24 08:02:06,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1307 transitions, 31235 flow, removed 101 selfloop flow, removed 8 redundant places. [2023-08-24 08:02:06,396 INFO L231 Difference]: Finished difference. Result has 506 places, 1185 transitions, 27794 flow [2023-08-24 08:02:06,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=24474, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=27794, PETRI_PLACES=506, PETRI_TRANSITIONS=1185} [2023-08-24 08:02:06,397 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-08-24 08:02:06,397 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1185 transitions, 27794 flow [2023-08-24 08:02:06,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:06,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:06,398 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:06,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:06,598 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 [2023-08-24 08:02:06,598 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:06,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2073565313, now seen corresponding path program 55 times [2023-08-24 08:02:06,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:06,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668265313] [2023-08-24 08:02:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:06,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668265313] [2023-08-24 08:02:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668265313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512491521] [2023-08-24 08:02:06,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:02:06,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:06,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:06,662 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) [2023-08-24 08:02:06,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 08:02:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:06,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:06,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:06,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512491521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:06,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:02:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266472540] [2023-08-24 08:02:06,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:02:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:02:06,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:02:06,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:06,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1185 transitions, 27794 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:06,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:06,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:06,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:08,692 INFO L124 PetriNetUnfolderBase]: 2656/4457 cut-off events. [2023-08-24 08:02:08,692 INFO L125 PetriNetUnfolderBase]: For 154963/154963 co-relation queries the response was YES. [2023-08-24 08:02:08,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48082 conditions, 4457 events. 2656/4457 cut-off events. For 154963/154963 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28074 event pairs, 477 based on Foata normal form. 44/4501 useless extension candidates. Maximal degree in co-relation 47888. Up to 3091 conditions per place. [2023-08-24 08:02:08,752 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 833 selfloop transitions, 516 changer transitions 9/1358 dead transitions. [2023-08-24 08:02:08,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1358 transitions, 34412 flow [2023-08-24 08:02:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:02:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:02:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3266 transitions. [2023-08-24 08:02:08,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182353694455116 [2023-08-24 08:02:08,754 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3266 transitions. [2023-08-24 08:02:08,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3266 transitions. [2023-08-24 08:02:08,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:08,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3266 transitions. [2023-08-24 08:02:08,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.89473684210526) internal successors, (3266), 19 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:08,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:02:08,759 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:02:08,759 INFO L175 Difference]: Start difference. First operand has 506 places, 1185 transitions, 27794 flow. Second operand 19 states and 3266 transitions. [2023-08-24 08:02:08,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1358 transitions, 34412 flow [2023-08-24 08:02:09,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1358 transitions, 33297 flow, removed 349 selfloop flow, removed 11 redundant places. [2023-08-24 08:02:09,978 INFO L231 Difference]: Finished difference. Result has 515 places, 1254 transitions, 30400 flow [2023-08-24 08:02:09,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=26612, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=674, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30400, PETRI_PLACES=515, PETRI_TRANSITIONS=1254} [2023-08-24 08:02:09,979 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 495 predicate places. [2023-08-24 08:02:09,979 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 1254 transitions, 30400 flow [2023-08-24 08:02:09,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:09,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:09,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:09,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:10,185 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 [2023-08-24 08:02:10,186 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:10,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2018627697, now seen corresponding path program 56 times [2023-08-24 08:02:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:10,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284739563] [2023-08-24 08:02:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:10,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:10,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284739563] [2023-08-24 08:02:10,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284739563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840187885] [2023-08-24 08:02:10,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:02:10,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:10,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:10,249 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) [2023-08-24 08:02:10,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 08:02:10,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:02:10,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:10,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:10,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:10,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:10,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840187885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:10,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:10,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:02:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299313118] [2023-08-24 08:02:10,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:02:10,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:02:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:02:10,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:10,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 1254 transitions, 30400 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:10,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:10,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:12,371 INFO L124 PetriNetUnfolderBase]: 2634/4397 cut-off events. [2023-08-24 08:02:12,371 INFO L125 PetriNetUnfolderBase]: For 150633/150633 co-relation queries the response was YES. [2023-08-24 08:02:12,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48206 conditions, 4397 events. 2634/4397 cut-off events. For 150633/150633 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 27325 event pairs, 475 based on Foata normal form. 26/4423 useless extension candidates. Maximal degree in co-relation 48008. Up to 3101 conditions per place. [2023-08-24 08:02:12,432 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 813 selfloop transitions, 539 changer transitions 1/1353 dead transitions. [2023-08-24 08:02:12,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1353 transitions, 34652 flow [2023-08-24 08:02:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 08:02:12,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 08:02:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4794 transitions. [2023-08-24 08:02:12,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165797705943691 [2023-08-24 08:02:12,435 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4794 transitions. [2023-08-24 08:02:12,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4794 transitions. [2023-08-24 08:02:12,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:12,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4794 transitions. [2023-08-24 08:02:12,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 171.21428571428572) internal successors, (4794), 28 states have internal predecessors, (4794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:12,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 411.0) internal successors, (11919), 29 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:12,443 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 411.0) internal successors, (11919), 29 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:12,443 INFO L175 Difference]: Start difference. First operand has 515 places, 1254 transitions, 30400 flow. Second operand 28 states and 4794 transitions. [2023-08-24 08:02:12,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1353 transitions, 34652 flow [2023-08-24 08:02:13,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 1353 transitions, 33313 flow, removed 445 selfloop flow, removed 13 redundant places. [2023-08-24 08:02:13,808 INFO L231 Difference]: Finished difference. Result has 531 places, 1263 transitions, 30485 flow [2023-08-24 08:02:13,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=28801, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30485, PETRI_PLACES=531, PETRI_TRANSITIONS=1263} [2023-08-24 08:02:13,809 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-08-24 08:02:13,809 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1263 transitions, 30485 flow [2023-08-24 08:02:13,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:13,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:13,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:13,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:14,010 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 [2023-08-24 08:02:14,010 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:14,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:14,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1708601552, now seen corresponding path program 57 times [2023-08-24 08:02:14,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:14,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558738472] [2023-08-24 08:02:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:14,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558738472] [2023-08-24 08:02:14,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558738472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386486457] [2023-08-24 08:02:14,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:02:14,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:14,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:14,080 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) [2023-08-24 08:02:14,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 08:02:14,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:02:14,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:14,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:14,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:14,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:14,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386486457] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:14,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:14,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:02:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131445] [2023-08-24 08:02:14,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:14,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:02:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:14,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:02:14,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:02:14,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:14,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1263 transitions, 30485 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:14,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:14,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:14,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:16,263 INFO L124 PetriNetUnfolderBase]: 2944/4839 cut-off events. [2023-08-24 08:02:16,263 INFO L125 PetriNetUnfolderBase]: For 165259/165259 co-relation queries the response was YES. [2023-08-24 08:02:16,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55069 conditions, 4839 events. 2944/4839 cut-off events. For 165259/165259 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30106 event pairs, 275 based on Foata normal form. 20/4859 useless extension candidates. Maximal degree in co-relation 54868. Up to 1923 conditions per place. [2023-08-24 08:02:16,334 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 698 selfloop transitions, 760 changer transitions 13/1471 dead transitions. [2023-08-24 08:02:16,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1471 transitions, 39646 flow [2023-08-24 08:02:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:02:16,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:02:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3601 transitions. [2023-08-24 08:02:16,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172170084578844 [2023-08-24 08:02:16,337 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3601 transitions. [2023-08-24 08:02:16,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3601 transitions. [2023-08-24 08:02:16,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:16,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3601 transitions. [2023-08-24 08:02:16,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.47619047619048) internal successors, (3601), 21 states have internal predecessors, (3601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:16,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:16,342 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:16,342 INFO L175 Difference]: Start difference. First operand has 531 places, 1263 transitions, 30485 flow. Second operand 21 states and 3601 transitions. [2023-08-24 08:02:16,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1471 transitions, 39646 flow [2023-08-24 08:02:17,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1471 transitions, 38190 flow, removed 338 selfloop flow, removed 14 redundant places. [2023-08-24 08:02:17,891 INFO L231 Difference]: Finished difference. Result has 543 places, 1416 transitions, 36538 flow [2023-08-24 08:02:17,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=29449, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=599, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=36538, PETRI_PLACES=543, PETRI_TRANSITIONS=1416} [2023-08-24 08:02:17,892 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 523 predicate places. [2023-08-24 08:02:17,892 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 1416 transitions, 36538 flow [2023-08-24 08:02:17,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:17,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:17,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:17,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:18,098 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 [2023-08-24 08:02:18,098 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:18,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1852844954, now seen corresponding path program 58 times [2023-08-24 08:02:18,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:18,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276222744] [2023-08-24 08:02:18,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:18,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:18,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:18,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276222744] [2023-08-24 08:02:18,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276222744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:18,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675383476] [2023-08-24 08:02:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:02:18,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:18,166 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) [2023-08-24 08:02:18,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 08:02:18,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:02:18,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:18,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:18,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:18,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:18,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675383476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:18,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:18,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 08:02:18,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475336821] [2023-08-24 08:02:18,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:18,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:18,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:18,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:18,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1416 transitions, 36538 flow. Second operand has 18 states, 18 states have (on average 169.05555555555554) internal successors, (3043), 18 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:18,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:18,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:18,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:21,105 INFO L124 PetriNetUnfolderBase]: 3180/5261 cut-off events. [2023-08-24 08:02:21,105 INFO L125 PetriNetUnfolderBase]: For 180127/180127 co-relation queries the response was YES. [2023-08-24 08:02:21,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59641 conditions, 5261 events. 3180/5261 cut-off events. For 180127/180127 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 33415 event pairs, 196 based on Foata normal form. 12/5273 useless extension candidates. Maximal degree in co-relation 59436. Up to 2542 conditions per place. [2023-08-24 08:02:21,176 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 1017 selfloop transitions, 564 changer transitions 0/1581 dead transitions. [2023-08-24 08:02:21,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1581 transitions, 42610 flow [2023-08-24 08:02:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 08:02:21,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 08:02:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4975 transitions. [2023-08-24 08:02:21,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174007886567665 [2023-08-24 08:02:21,179 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4975 transitions. [2023-08-24 08:02:21,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4975 transitions. [2023-08-24 08:02:21,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:21,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4975 transitions. [2023-08-24 08:02:21,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 171.55172413793105) internal successors, (4975), 29 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:21,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 411.0) internal successors, (12330), 30 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:21,187 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 411.0) internal successors, (12330), 30 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:21,187 INFO L175 Difference]: Start difference. First operand has 543 places, 1416 transitions, 36538 flow. Second operand 29 states and 4975 transitions. [2023-08-24 08:02:21,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1581 transitions, 42610 flow [2023-08-24 08:02:23,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 1581 transitions, 40927 flow, removed 602 selfloop flow, removed 9 redundant places. [2023-08-24 08:02:23,122 INFO L231 Difference]: Finished difference. Result has 565 places, 1515 transitions, 38698 flow [2023-08-24 08:02:23,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=34923, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=38698, PETRI_PLACES=565, PETRI_TRANSITIONS=1515} [2023-08-24 08:02:23,123 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 545 predicate places. [2023-08-24 08:02:23,124 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 1515 transitions, 38698 flow [2023-08-24 08:02:23,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 169.05555555555554) internal successors, (3043), 18 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:23,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:23,124 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:23,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:23,330 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 [2023-08-24 08:02:23,330 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:23,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 184187056, now seen corresponding path program 59 times [2023-08-24 08:02:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:23,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799354766] [2023-08-24 08:02:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799354766] [2023-08-24 08:02:23,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799354766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:23,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344209944] [2023-08-24 08:02:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:02:23,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:23,389 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) [2023-08-24 08:02:23,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 08:02:23,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:02:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:23,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:23,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:23,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:23,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344209944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:23,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:23,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-24 08:02:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977354127] [2023-08-24 08:02:23,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:23,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:02:23,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:23,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:02:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:02:23,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:23,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 1515 transitions, 38698 flow. Second operand has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:23,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:23,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:23,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:26,238 INFO L124 PetriNetUnfolderBase]: 3281/5494 cut-off events. [2023-08-24 08:02:26,238 INFO L125 PetriNetUnfolderBase]: For 192564/192564 co-relation queries the response was YES. [2023-08-24 08:02:26,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61578 conditions, 5494 events. 3281/5494 cut-off events. For 192564/192564 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35724 event pairs, 188 based on Foata normal form. 68/5562 useless extension candidates. Maximal degree in co-relation 61370. Up to 1730 conditions per place. [2023-08-24 08:02:26,320 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 659 selfloop transitions, 943 changer transitions 1/1603 dead transitions. [2023-08-24 08:02:26,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1603 transitions, 43531 flow [2023-08-24 08:02:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:02:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:02:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4290 transitions. [2023-08-24 08:02:26,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41751824817518246 [2023-08-24 08:02:26,323 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4290 transitions. [2023-08-24 08:02:26,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4290 transitions. [2023-08-24 08:02:26,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:26,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4290 transitions. [2023-08-24 08:02:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.6) internal successors, (4290), 25 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:26,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:26,330 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:26,330 INFO L175 Difference]: Start difference. First operand has 565 places, 1515 transitions, 38698 flow. Second operand 25 states and 4290 transitions. [2023-08-24 08:02:26,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1603 transitions, 43531 flow [2023-08-24 08:02:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1603 transitions, 42599 flow, removed 218 selfloop flow, removed 12 redundant places. [2023-08-24 08:02:28,436 INFO L231 Difference]: Finished difference. Result has 579 places, 1549 transitions, 41646 flow [2023-08-24 08:02:28,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=36858, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=41646, PETRI_PLACES=579, PETRI_TRANSITIONS=1549} [2023-08-24 08:02:28,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 559 predicate places. [2023-08-24 08:02:28,437 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 1549 transitions, 41646 flow [2023-08-24 08:02:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:28,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:28,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:28,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-08-24 08:02:28,638 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 [2023-08-24 08:02:28,638 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:28,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1552362498, now seen corresponding path program 60 times [2023-08-24 08:02:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899154995] [2023-08-24 08:02:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:28,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:28,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:28,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899154995] [2023-08-24 08:02:28,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899154995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:28,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243465816] [2023-08-24 08:02:28,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:02:28,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:28,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:28,704 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:28,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-24 08:02:28,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:02:28,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:28,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:28,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:28,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:28,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243465816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:28,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:28,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-24 08:02:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346616727] [2023-08-24 08:02:28,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:02:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:28,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:02:28,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:02:28,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:28,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 1549 transitions, 41646 flow. Second operand has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:28,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:28,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:28,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:31,949 INFO L124 PetriNetUnfolderBase]: 3389/5690 cut-off events. [2023-08-24 08:02:31,950 INFO L125 PetriNetUnfolderBase]: For 210263/210263 co-relation queries the response was YES. [2023-08-24 08:02:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65731 conditions, 5690 events. 3389/5690 cut-off events. For 210263/210263 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37445 event pairs, 157 based on Foata normal form. 28/5718 useless extension candidates. Maximal degree in co-relation 65523. Up to 2139 conditions per place. [2023-08-24 08:02:32,027 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 827 selfloop transitions, 825 changer transitions 0/1652 dead transitions. [2023-08-24 08:02:32,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 1652 transitions, 46657 flow [2023-08-24 08:02:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 08:02:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 08:02:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4459 transitions. [2023-08-24 08:02:32,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172749391727494 [2023-08-24 08:02:32,029 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4459 transitions. [2023-08-24 08:02:32,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4459 transitions. [2023-08-24 08:02:32,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:32,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4459 transitions. [2023-08-24 08:02:32,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.5) internal successors, (4459), 26 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:32,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:32,036 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:32,037 INFO L175 Difference]: Start difference. First operand has 579 places, 1549 transitions, 41646 flow. Second operand 26 states and 4459 transitions. [2023-08-24 08:02:32,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 1652 transitions, 46657 flow [2023-08-24 08:02:34,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 1652 transitions, 45736 flow, removed 378 selfloop flow, removed 12 redundant places. [2023-08-24 08:02:34,495 INFO L231 Difference]: Finished difference. Result has 595 places, 1606 transitions, 44206 flow [2023-08-24 08:02:34,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=40750, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=770, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=44206, PETRI_PLACES=595, PETRI_TRANSITIONS=1606} [2023-08-24 08:02:34,496 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 575 predicate places. [2023-08-24 08:02:34,496 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 1606 transitions, 44206 flow [2023-08-24 08:02:34,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 169.0) internal successors, (2535), 15 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:34,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:34,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:34,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-24 08:02:34,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:34,697 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:34,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:34,697 INFO L85 PathProgramCache]: Analyzing trace with hash -886551250, now seen corresponding path program 61 times [2023-08-24 08:02:34,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:34,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354472899] [2023-08-24 08:02:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:34,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:34,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354472899] [2023-08-24 08:02:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354472899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854675240] [2023-08-24 08:02:34,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:02:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:34,762 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:34,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-24 08:02:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:34,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:34,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:34,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:02:34,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854675240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:34,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-08-24 08:02:34,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654948687] [2023-08-24 08:02:34,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:02:34,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:02:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:02:34,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:34,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1606 transitions, 44206 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:34,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:34,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:34,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:38,344 INFO L124 PetriNetUnfolderBase]: 3555/5932 cut-off events. [2023-08-24 08:02:38,344 INFO L125 PetriNetUnfolderBase]: For 227571/227571 co-relation queries the response was YES. [2023-08-24 08:02:38,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71268 conditions, 5932 events. 3555/5932 cut-off events. For 227571/227571 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 39223 event pairs, 399 based on Foata normal form. 12/5944 useless extension candidates. Maximal degree in co-relation 71057. Up to 2649 conditions per place. [2023-08-24 08:02:38,424 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 794 selfloop transitions, 937 changer transitions 10/1741 dead transitions. [2023-08-24 08:02:38,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1741 transitions, 51582 flow [2023-08-24 08:02:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:02:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:02:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3770 transitions. [2023-08-24 08:02:38,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41694315416943156 [2023-08-24 08:02:38,427 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3770 transitions. [2023-08-24 08:02:38,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3770 transitions. [2023-08-24 08:02:38,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:38,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3770 transitions. [2023-08-24 08:02:38,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 171.36363636363637) internal successors, (3770), 22 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,433 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:38,433 INFO L175 Difference]: Start difference. First operand has 595 places, 1606 transitions, 44206 flow. Second operand 22 states and 3770 transitions. [2023-08-24 08:02:38,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1741 transitions, 51582 flow [2023-08-24 08:02:40,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1741 transitions, 51009 flow, removed 160 selfloop flow, removed 13 redundant places. [2023-08-24 08:02:40,892 INFO L231 Difference]: Finished difference. Result has 609 places, 1689 transitions, 49396 flow [2023-08-24 08:02:40,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=43633, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=864, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=49396, PETRI_PLACES=609, PETRI_TRANSITIONS=1689} [2023-08-24 08:02:40,893 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 589 predicate places. [2023-08-24 08:02:40,894 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1689 transitions, 49396 flow [2023-08-24 08:02:40,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:40,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:40,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:40,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:41,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-24 08:02:41,095 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:41,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:41,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1816608548, now seen corresponding path program 62 times [2023-08-24 08:02:41,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:41,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409178939] [2023-08-24 08:02:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:41,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:41,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409178939] [2023-08-24 08:02:41,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409178939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:41,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926878279] [2023-08-24 08:02:41,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:02:41,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:41,170 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:41,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-24 08:02:41,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:02:41,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:41,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:41,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:41,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926878279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:41,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:41,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 08:02:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388031450] [2023-08-24 08:02:41,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:41,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:02:41,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:02:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:02:41,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:41,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1689 transitions, 49396 flow. Second operand has 20 states, 20 states have (on average 168.9) internal successors, (3378), 20 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:41,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:41,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:41,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:45,933 INFO L124 PetriNetUnfolderBase]: 4395/7406 cut-off events. [2023-08-24 08:02:45,933 INFO L125 PetriNetUnfolderBase]: For 290251/290251 co-relation queries the response was YES. [2023-08-24 08:02:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90924 conditions, 7406 events. 4395/7406 cut-off events. For 290251/290251 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 51075 event pairs, 246 based on Foata normal form. 34/7440 useless extension candidates. Maximal degree in co-relation 90709. Up to 2600 conditions per place. [2023-08-24 08:02:46,046 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 1071 selfloop transitions, 1059 changer transitions 0/2130 dead transitions. [2023-08-24 08:02:46,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 2130 transitions, 65281 flow [2023-08-24 08:02:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 08:02:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 08:02:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6172 transitions. [2023-08-24 08:02:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41713976750473103 [2023-08-24 08:02:46,050 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6172 transitions. [2023-08-24 08:02:46,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6172 transitions. [2023-08-24 08:02:46,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:46,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6172 transitions. [2023-08-24 08:02:46,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 171.44444444444446) internal successors, (6172), 36 states have internal predecessors, (6172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:46,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 411.0) internal successors, (15207), 37 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:46,062 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 411.0) internal successors, (15207), 37 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:46,062 INFO L175 Difference]: Start difference. First operand has 609 places, 1689 transitions, 49396 flow. Second operand 36 states and 6172 transitions. [2023-08-24 08:02:46,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 2130 transitions, 65281 flow [2023-08-24 08:02:49,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 632 places, 2130 transitions, 63489 flow, removed 562 selfloop flow, removed 10 redundant places. [2023-08-24 08:02:49,853 INFO L231 Difference]: Finished difference. Result has 644 places, 2063 transitions, 62440 flow [2023-08-24 08:02:49,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=47623, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=704, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=62440, PETRI_PLACES=644, PETRI_TRANSITIONS=2063} [2023-08-24 08:02:49,855 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 624 predicate places. [2023-08-24 08:02:49,855 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 2063 transitions, 62440 flow [2023-08-24 08:02:49,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.9) internal successors, (3378), 20 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:49,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:49,856 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:49,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:50,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-24 08:02:50,061 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:50,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:50,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1779094656, now seen corresponding path program 63 times [2023-08-24 08:02:50,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:50,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148577766] [2023-08-24 08:02:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:50,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:50,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:50,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148577766] [2023-08-24 08:02:50,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148577766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:50,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807158070] [2023-08-24 08:02:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:02:50,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:50,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:50,129 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:50,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-24 08:02:50,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:02:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:50,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:50,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:50,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:50,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:02:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807158070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:02:50,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:02:50,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 08:02:50,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077264641] [2023-08-24 08:02:50,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:02:50,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:02:50,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:02:50,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:02:50,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:02:50,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:02:50,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 2063 transitions, 62440 flow. Second operand has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:50,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:02:50,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:02:50,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:02:55,255 INFO L124 PetriNetUnfolderBase]: 4528/7605 cut-off events. [2023-08-24 08:02:55,255 INFO L125 PetriNetUnfolderBase]: For 308640/308640 co-relation queries the response was YES. [2023-08-24 08:02:55,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96259 conditions, 7605 events. 4528/7605 cut-off events. For 308640/308640 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 52782 event pairs, 572 based on Foata normal form. 6/7611 useless extension candidates. Maximal degree in co-relation 96033. Up to 3652 conditions per place. [2023-08-24 08:02:55,379 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 974 selfloop transitions, 1203 changer transitions 10/2187 dead transitions. [2023-08-24 08:02:55,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2187 transitions, 69857 flow [2023-08-24 08:02:55,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:02:55,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:02:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3936 transitions. [2023-08-24 08:02:55,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41637575372897495 [2023-08-24 08:02:55,382 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3936 transitions. [2023-08-24 08:02:55,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3936 transitions. [2023-08-24 08:02:55,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:02:55,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3936 transitions. [2023-08-24 08:02:55,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 171.1304347826087) internal successors, (3936), 23 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:55,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:02:55,389 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 411.0) internal successors, (9864), 24 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) [2023-08-24 08:02:55,389 INFO L175 Difference]: Start difference. First operand has 644 places, 2063 transitions, 62440 flow. Second operand 23 states and 3936 transitions. [2023-08-24 08:02:55,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2187 transitions, 69857 flow [2023-08-24 08:02:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 2187 transitions, 69237 flow, removed 270 selfloop flow, removed 9 redundant places. [2023-08-24 08:02:59,537 INFO L231 Difference]: Finished difference. Result has 664 places, 2131 transitions, 67608 flow [2023-08-24 08:02:59,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=61856, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=67608, PETRI_PLACES=664, PETRI_TRANSITIONS=2131} [2023-08-24 08:02:59,538 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 644 predicate places. [2023-08-24 08:02:59,538 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 2131 transitions, 67608 flow [2023-08-24 08:02:59,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:02:59,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:02:59,539 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:02:59,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-24 08:02:59,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-24 08:02:59,739 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:02:59,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:02:59,740 INFO L85 PathProgramCache]: Analyzing trace with hash -857039024, now seen corresponding path program 64 times [2023-08-24 08:02:59,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:02:59,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688411123] [2023-08-24 08:02:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:02:59,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:02:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:02:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:59,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:02:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688411123] [2023-08-24 08:02:59,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688411123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:02:59,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187203316] [2023-08-24 08:02:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:02:59,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:02:59,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:02:59,808 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:02:59,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-24 08:02:59,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:02:59,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:02:59,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:02:59,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:02:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:02:59,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:00,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187203316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:00,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-24 08:03:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81839688] [2023-08-24 08:03:00,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:00,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:03:00,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:00,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:03:00,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:03:00,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:03:00,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 2131 transitions, 67608 flow. Second operand has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:00,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:00,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:03:00,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:05,534 INFO L124 PetriNetUnfolderBase]: 4992/8333 cut-off events. [2023-08-24 08:03:05,535 INFO L125 PetriNetUnfolderBase]: For 357740/357740 co-relation queries the response was YES. [2023-08-24 08:03:05,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109585 conditions, 8333 events. 4992/8333 cut-off events. For 357740/357740 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 58045 event pairs, 214 based on Foata normal form. 22/8355 useless extension candidates. Maximal degree in co-relation 109351. Up to 2248 conditions per place. [2023-08-24 08:03:05,663 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 881 selfloop transitions, 1532 changer transitions 0/2413 dead transitions. [2023-08-24 08:03:05,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2413 transitions, 80770 flow [2023-08-24 08:03:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 08:03:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 08:03:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4632 transitions. [2023-08-24 08:03:05,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174101108407678 [2023-08-24 08:03:05,666 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4632 transitions. [2023-08-24 08:03:05,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4632 transitions. [2023-08-24 08:03:05,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:05,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4632 transitions. [2023-08-24 08:03:05,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 171.55555555555554) internal successors, (4632), 27 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:05,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 411.0) internal successors, (11508), 28 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:05,674 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 411.0) internal successors, (11508), 28 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:05,674 INFO L175 Difference]: Start difference. First operand has 664 places, 2131 transitions, 67608 flow. Second operand 27 states and 4632 transitions. [2023-08-24 08:03:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2413 transitions, 80770 flow [2023-08-24 08:03:10,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 2413 transitions, 79613 flow, removed 160 selfloop flow, removed 14 redundant places. [2023-08-24 08:03:10,972 INFO L231 Difference]: Finished difference. Result has 679 places, 2363 transitions, 79125 flow [2023-08-24 08:03:10,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=66516, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=79125, PETRI_PLACES=679, PETRI_TRANSITIONS=2363} [2023-08-24 08:03:10,973 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 659 predicate places. [2023-08-24 08:03:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 679 places, 2363 transitions, 79125 flow [2023-08-24 08:03:10,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.94117647058823) internal successors, (2872), 17 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:10,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:10,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-08-24 08:03:11,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-08-24 08:03:11,174 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:11,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:11,175 INFO L85 PathProgramCache]: Analyzing trace with hash -766922962, now seen corresponding path program 65 times [2023-08-24 08:03:11,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:11,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689954621] [2023-08-24 08:03:11,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:11,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:11,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:11,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689954621] [2023-08-24 08:03:11,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689954621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:11,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548798912] [2023-08-24 08:03:11,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:03:11,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:11,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:11,257 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:11,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-24 08:03:11,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:03:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:11,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:03:11,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:11,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548798912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:11,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:11,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-24 08:03:11,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103261106] [2023-08-24 08:03:11,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:11,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:03:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:03:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:03:11,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:03:11,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 2363 transitions, 79125 flow. Second operand has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:11,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:11,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:03:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:17,798 INFO L124 PetriNetUnfolderBase]: 5346/8841 cut-off events. [2023-08-24 08:03:17,799 INFO L125 PetriNetUnfolderBase]: For 430379/430379 co-relation queries the response was YES. [2023-08-24 08:03:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123527 conditions, 8841 events. 5346/8841 cut-off events. For 430379/430379 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 61449 event pairs, 312 based on Foata normal form. 24/8865 useless extension candidates. Maximal degree in co-relation 123289. Up to 3112 conditions per place. [2023-08-24 08:03:17,935 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 768 selfloop transitions, 1833 changer transitions 0/2601 dead transitions. [2023-08-24 08:03:17,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 2601 transitions, 92403 flow [2023-08-24 08:03:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 08:03:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 08:03:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4462 transitions. [2023-08-24 08:03:17,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41755568032940293 [2023-08-24 08:03:17,938 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4462 transitions. [2023-08-24 08:03:17,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4462 transitions. [2023-08-24 08:03:17,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:17,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4462 transitions. [2023-08-24 08:03:17,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.6153846153846) internal successors, (4462), 26 states have internal predecessors, (4462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:17,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:17,946 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:17,946 INFO L175 Difference]: Start difference. First operand has 679 places, 2363 transitions, 79125 flow. Second operand 26 states and 4462 transitions. [2023-08-24 08:03:17,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 2601 transitions, 92403 flow [2023-08-24 08:03:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 690 places, 2601 transitions, 91259 flow, removed 285 selfloop flow, removed 13 redundant places. [2023-08-24 08:03:24,449 INFO L231 Difference]: Finished difference. Result has 696 places, 2555 transitions, 91368 flow [2023-08-24 08:03:24,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=77971, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=91368, PETRI_PLACES=696, PETRI_TRANSITIONS=2555} [2023-08-24 08:03:24,450 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 676 predicate places. [2023-08-24 08:03:24,450 INFO L495 AbstractCegarLoop]: Abstraction has has 696 places, 2555 transitions, 91368 flow [2023-08-24 08:03:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.88235294117646) internal successors, (2871), 17 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:24,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:24,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:24,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:24,654 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:24,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1475849886, now seen corresponding path program 66 times [2023-08-24 08:03:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909091045] [2023-08-24 08:03:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:24,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909091045] [2023-08-24 08:03:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909091045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226996648] [2023-08-24 08:03:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:03:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:24,742 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:24,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-24 08:03:24,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:03:24,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:24,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:03:24,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:24,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:24,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226996648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:24,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:24,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:03:24,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940180380] [2023-08-24 08:03:24,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:24,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:03:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:24,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:03:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:03:24,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:03:24,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 696 places, 2555 transitions, 91368 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:24,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:24,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:03:24,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:31,831 INFO L124 PetriNetUnfolderBase]: 5675/9310 cut-off events. [2023-08-24 08:03:31,832 INFO L125 PetriNetUnfolderBase]: For 496909/496909 co-relation queries the response was YES. [2023-08-24 08:03:31,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136853 conditions, 9310 events. 5675/9310 cut-off events. For 496909/496909 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 64160 event pairs, 708 based on Foata normal form. 24/9334 useless extension candidates. Maximal degree in co-relation 136609. Up to 6038 conditions per place. [2023-08-24 08:03:31,983 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 1867 selfloop transitions, 922 changer transitions 0/2789 dead transitions. [2023-08-24 08:03:31,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2789 transitions, 103077 flow [2023-08-24 08:03:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 08:03:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 08:03:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4809 transitions. [2023-08-24 08:03:31,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41788321167883213 [2023-08-24 08:03:31,986 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4809 transitions. [2023-08-24 08:03:31,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4809 transitions. [2023-08-24 08:03:31,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:31,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4809 transitions. [2023-08-24 08:03:31,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 171.75) internal successors, (4809), 28 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:31,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 411.0) internal successors, (11919), 29 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:31,994 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 411.0) internal successors, (11919), 29 states have internal predecessors, (11919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:31,994 INFO L175 Difference]: Start difference. First operand has 696 places, 2555 transitions, 91368 flow. Second operand 28 states and 4809 transitions. [2023-08-24 08:03:31,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2789 transitions, 103077 flow [2023-08-24 08:03:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 2789 transitions, 101695 flow, removed 551 selfloop flow, removed 14 redundant places. [2023-08-24 08:03:40,832 INFO L231 Difference]: Finished difference. Result has 715 places, 2727 transitions, 98323 flow [2023-08-24 08:03:40,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=89987, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=774, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=98323, PETRI_PLACES=715, PETRI_TRANSITIONS=2727} [2023-08-24 08:03:40,835 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 695 predicate places. [2023-08-24 08:03:40,835 INFO L495 AbstractCegarLoop]: Abstraction has has 715 places, 2727 transitions, 98323 flow [2023-08-24 08:03:40,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:40,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:40,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:40,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:41,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:41,041 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:41,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1269272146, now seen corresponding path program 67 times [2023-08-24 08:03:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429993161] [2023-08-24 08:03:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:41,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429993161] [2023-08-24 08:03:41,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429993161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:41,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602674653] [2023-08-24 08:03:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:03:41,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:41,126 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:41,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-24 08:03:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:41,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:03:41,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:41,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:41,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602674653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:41,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:41,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:03:41,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616298074] [2023-08-24 08:03:41,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:41,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:03:41,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:41,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:03:41,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:03:41,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:03:41,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 2727 transitions, 98323 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:41,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:41,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:03:41,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:03:48,924 INFO L124 PetriNetUnfolderBase]: 5683/9334 cut-off events. [2023-08-24 08:03:48,924 INFO L125 PetriNetUnfolderBase]: For 496473/496473 co-relation queries the response was YES. [2023-08-24 08:03:49,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140436 conditions, 9334 events. 5683/9334 cut-off events. For 496473/496473 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 64508 event pairs, 774 based on Foata normal form. 6/9340 useless extension candidates. Maximal degree in co-relation 140185. Up to 6412 conditions per place. [2023-08-24 08:03:49,099 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2075 selfloop transitions, 686 changer transitions 10/2771 dead transitions. [2023-08-24 08:03:49,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 2771 transitions, 104941 flow [2023-08-24 08:03:49,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:03:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:03:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2575 transitions. [2023-08-24 08:03:49,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41768045417680455 [2023-08-24 08:03:49,102 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2575 transitions. [2023-08-24 08:03:49,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2575 transitions. [2023-08-24 08:03:49,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:03:49,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2575 transitions. [2023-08-24 08:03:49,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 171.66666666666666) internal successors, (2575), 15 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:49,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 411.0) internal successors, (6576), 16 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) [2023-08-24 08:03:49,106 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 411.0) internal successors, (6576), 16 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) [2023-08-24 08:03:49,107 INFO L175 Difference]: Start difference. First operand has 715 places, 2727 transitions, 98323 flow. Second operand 15 states and 2575 transitions. [2023-08-24 08:03:49,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 2771 transitions, 104941 flow [2023-08-24 08:03:57,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 2771 transitions, 103033 flow, removed 762 selfloop flow, removed 16 redundant places. [2023-08-24 08:03:57,718 INFO L231 Difference]: Finished difference. Result has 716 places, 2726 transitions, 98056 flow [2023-08-24 08:03:57,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=96416, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=98056, PETRI_PLACES=716, PETRI_TRANSITIONS=2726} [2023-08-24 08:03:57,721 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 696 predicate places. [2023-08-24 08:03:57,721 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 2726 transitions, 98056 flow [2023-08-24 08:03:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:03:57,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:03:57,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-24 08:03:57,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:57,927 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:03:57,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:03:57,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1504030576, now seen corresponding path program 68 times [2023-08-24 08:03:57,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:03:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029218165] [2023-08-24 08:03:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:03:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:03:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:03:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:57,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:03:57,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029218165] [2023-08-24 08:03:57,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029218165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:03:57,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882914863] [2023-08-24 08:03:57,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:03:57,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:03:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:03:57,991 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:03:57,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-24 08:03:58,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:03:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:03:58,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:03:58,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:03:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:58,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:03:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:03:58,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882914863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:03:58,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:03:58,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 08:03:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831606418] [2023-08-24 08:03:58,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:03:58,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:03:58,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:03:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:03:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:03:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:03:58,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 2726 transitions, 98056 flow. Second operand has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:03:58,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:03:58,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:03:58,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:04:05,470 INFO L124 PetriNetUnfolderBase]: 5667/9322 cut-off events. [2023-08-24 08:04:05,470 INFO L125 PetriNetUnfolderBase]: For 494402/494402 co-relation queries the response was YES. [2023-08-24 08:04:05,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139601 conditions, 9322 events. 5667/9322 cut-off events. For 494402/494402 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 64648 event pairs, 774 based on Foata normal form. 2/9324 useless extension candidates. Maximal degree in co-relation 139353. Up to 6388 conditions per place. [2023-08-24 08:04:05,624 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 2127 selfloop transitions, 623 changer transitions 7/2757 dead transitions. [2023-08-24 08:04:05,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 723 places, 2757 transitions, 104022 flow [2023-08-24 08:04:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:04:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:04:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1554 transitions. [2023-08-24 08:04:05,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42011354420113545 [2023-08-24 08:04:05,626 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1554 transitions. [2023-08-24 08:04:05,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1554 transitions. [2023-08-24 08:04:05,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:04:05,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1554 transitions. [2023-08-24 08:04:05,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.66666666666666) internal successors, (1554), 9 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:05,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:05,629 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 411.0) internal successors, (4110), 10 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:05,629 INFO L175 Difference]: Start difference. First operand has 716 places, 2726 transitions, 98056 flow. Second operand 9 states and 1554 transitions. [2023-08-24 08:04:05,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 723 places, 2757 transitions, 104022 flow [2023-08-24 08:04:13,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 2757 transitions, 102923 flow, removed 115 selfloop flow, removed 9 redundant places. [2023-08-24 08:04:13,837 INFO L231 Difference]: Finished difference. Result has 715 places, 2722 transitions, 98122 flow [2023-08-24 08:04:13,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=96942, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=98122, PETRI_PLACES=715, PETRI_TRANSITIONS=2722} [2023-08-24 08:04:13,839 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 695 predicate places. [2023-08-24 08:04:13,839 INFO L495 AbstractCegarLoop]: Abstraction has has 715 places, 2722 transitions, 98122 flow [2023-08-24 08:04:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:13,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:04:13,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:04:13,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-24 08:04:14,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-08-24 08:04:14,040 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:04:14,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:04:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash -802793616, now seen corresponding path program 69 times [2023-08-24 08:04:14,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:04:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849813016] [2023-08-24 08:04:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:04:14,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:04:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:04:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:04:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849813016] [2023-08-24 08:04:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849813016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:04:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108681117] [2023-08-24 08:04:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:04:14,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:04:14,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:04:14,110 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:04:14,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-24 08:04:14,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:04:14,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:04:14,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:04:14,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:04:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:14,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:04:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:14,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108681117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:04:14,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:04:14,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-24 08:04:14,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392928648] [2023-08-24 08:04:14,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:04:14,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:04:14,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:04:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:04:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:04:14,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:04:14,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 2722 transitions, 98122 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:14,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:04:14,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:04:14,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:04:21,622 INFO L124 PetriNetUnfolderBase]: 5663/9302 cut-off events. [2023-08-24 08:04:21,622 INFO L125 PetriNetUnfolderBase]: For 491122/491122 co-relation queries the response was YES. [2023-08-24 08:04:21,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140680 conditions, 9302 events. 5663/9302 cut-off events. For 491122/491122 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 64342 event pairs, 1203 based on Foata normal form. 10/9312 useless extension candidates. Maximal degree in co-relation 140431. Up to 8213 conditions per place. [2023-08-24 08:04:21,796 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2396 selfloop transitions, 347 changer transitions 7/2750 dead transitions. [2023-08-24 08:04:21,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 2750 transitions, 104372 flow [2023-08-24 08:04:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:04:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:04:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2745 transitions. [2023-08-24 08:04:21,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41742700729927007 [2023-08-24 08:04:21,799 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2745 transitions. [2023-08-24 08:04:21,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2745 transitions. [2023-08-24 08:04:21,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:04:21,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2745 transitions. [2023-08-24 08:04:21,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.5625) internal successors, (2745), 16 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:21,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:21,804 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:21,804 INFO L175 Difference]: Start difference. First operand has 715 places, 2722 transitions, 98122 flow. Second operand 16 states and 2745 transitions. [2023-08-24 08:04:21,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 2750 transitions, 104372 flow [2023-08-24 08:04:29,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 721 places, 2750 transitions, 103082 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-24 08:04:30,034 INFO L231 Difference]: Finished difference. Result has 724 places, 2715 transitions, 97707 flow [2023-08-24 08:04:30,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=96680, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=97707, PETRI_PLACES=724, PETRI_TRANSITIONS=2715} [2023-08-24 08:04:30,036 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 704 predicate places. [2023-08-24 08:04:30,037 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2715 transitions, 97707 flow [2023-08-24 08:04:30,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:30,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:04:30,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:04:30,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-24 08:04:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:04:30,242 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:04:30,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:04:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1780020207, now seen corresponding path program 70 times [2023-08-24 08:04:30,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:04:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570006579] [2023-08-24 08:04:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:04:30,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:04:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:04:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:04:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570006579] [2023-08-24 08:04:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570006579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:04:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87328647] [2023-08-24 08:04:30,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:04:30,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:04:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:04:30,322 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:04:30,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-24 08:04:30,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:04:30,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:04:30,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:04:30,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:04:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:30,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:04:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87328647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:04:30,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:04:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-08-24 08:04:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421048269] [2023-08-24 08:04:30,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:04:30,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:04:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:04:30,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:04:30,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:04:30,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:04:30,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2715 transitions, 97707 flow. Second operand has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:30,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:04:30,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:04:30,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:04:37,812 INFO L124 PetriNetUnfolderBase]: 5784/9493 cut-off events. [2023-08-24 08:04:37,812 INFO L125 PetriNetUnfolderBase]: For 488895/488895 co-relation queries the response was YES. [2023-08-24 08:04:37,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141978 conditions, 9493 events. 5784/9493 cut-off events. For 488895/488895 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 65853 event pairs, 37 based on Foata normal form. 12/9505 useless extension candidates. Maximal degree in co-relation 141727. Up to 5261 conditions per place. [2023-08-24 08:04:37,975 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 1880 selfloop transitions, 957 changer transitions 0/2837 dead transitions. [2023-08-24 08:04:37,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 2837 transitions, 106057 flow [2023-08-24 08:04:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:04:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:04:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2242 transitions. [2023-08-24 08:04:37,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196144488115291 [2023-08-24 08:04:37,977 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2242 transitions. [2023-08-24 08:04:37,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2242 transitions. [2023-08-24 08:04:37,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:04:37,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2242 transitions. [2023-08-24 08:04:37,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 172.46153846153845) internal successors, (2242), 13 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:37,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:37,981 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 411.0) internal successors, (5754), 14 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:37,981 INFO L175 Difference]: Start difference. First operand has 724 places, 2715 transitions, 97707 flow. Second operand 13 states and 2242 transitions. [2023-08-24 08:04:37,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 2837 transitions, 106057 flow [2023-08-24 08:04:46,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 2837 transitions, 105359 flow, removed 151 selfloop flow, removed 8 redundant places. [2023-08-24 08:04:46,443 INFO L231 Difference]: Finished difference. Result has 733 places, 2779 transitions, 100731 flow [2023-08-24 08:04:46,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=97021, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=893, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=100731, PETRI_PLACES=733, PETRI_TRANSITIONS=2779} [2023-08-24 08:04:46,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 713 predicate places. [2023-08-24 08:04:46,445 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 2779 transitions, 100731 flow [2023-08-24 08:04:46,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 168.85714285714286) internal successors, (2364), 14 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:46,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:04:46,446 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:04:46,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-24 08:04:46,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:04:46,651 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:04:46,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:04:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1326354673, now seen corresponding path program 71 times [2023-08-24 08:04:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:04:46,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224860122] [2023-08-24 08:04:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:04:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:04:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:04:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:04:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224860122] [2023-08-24 08:04:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224860122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:04:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575622065] [2023-08-24 08:04:46,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:04:46,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:04:46,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:04:46,717 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:04:46,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-24 08:04:46,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:04:46,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:04:46,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:04:46,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:04:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:46,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:04:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:04:46,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575622065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:04:46,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:04:46,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:04:46,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559480799] [2023-08-24 08:04:46,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:04:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:04:46,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:04:46,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:04:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:04:46,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:04:46,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 2779 transitions, 100731 flow. Second operand has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:46,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:04:46,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:04:46,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:04:55,248 INFO L124 PetriNetUnfolderBase]: 6015/9824 cut-off events. [2023-08-24 08:04:55,248 INFO L125 PetriNetUnfolderBase]: For 549887/549887 co-relation queries the response was YES. [2023-08-24 08:04:55,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149754 conditions, 9824 events. 6015/9824 cut-off events. For 549887/549887 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 68157 event pairs, 226 based on Foata normal form. 24/9848 useless extension candidates. Maximal degree in co-relation 149498. Up to 6882 conditions per place. [2023-08-24 08:04:55,420 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2205 selfloop transitions, 737 changer transitions 3/2945 dead transitions. [2023-08-24 08:04:55,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 2945 transitions, 111609 flow [2023-08-24 08:04:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:04:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:04:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3269 transitions. [2023-08-24 08:04:55,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41861954155461645 [2023-08-24 08:04:55,422 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3269 transitions. [2023-08-24 08:04:55,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3269 transitions. [2023-08-24 08:04:55,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:04:55,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3269 transitions. [2023-08-24 08:04:55,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 172.05263157894737) internal successors, (3269), 19 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:04:55,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:04:55,427 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:04:55,428 INFO L175 Difference]: Start difference. First operand has 733 places, 2779 transitions, 100731 flow. Second operand 19 states and 3269 transitions. [2023-08-24 08:04:55,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 2945 transitions, 111609 flow [2023-08-24 08:05:04,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 2945 transitions, 110554 flow, removed 84 selfloop flow, removed 5 redundant places. [2023-08-24 08:05:04,446 INFO L231 Difference]: Finished difference. Result has 753 places, 2896 transitions, 106107 flow [2023-08-24 08:05:04,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=99742, PETRI_DIFFERENCE_MINUEND_PLACES=728, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=630, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=106107, PETRI_PLACES=753, PETRI_TRANSITIONS=2896} [2023-08-24 08:05:04,448 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 733 predicate places. [2023-08-24 08:05:04,448 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 2896 transitions, 106107 flow [2023-08-24 08:05:04,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.93333333333334) internal successors, (2534), 15 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:04,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:05:04,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:05:04,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2023-08-24 08:05:04,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-08-24 08:05:04,650 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:05:04,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:05:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash -429716273, now seen corresponding path program 72 times [2023-08-24 08:05:04,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:05:04,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981520050] [2023-08-24 08:05:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:05:04,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:05:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:05:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:04,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:05:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981520050] [2023-08-24 08:05:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981520050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:05:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348095398] [2023-08-24 08:05:04,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:05:04,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:04,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:05:04,713 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:05:04,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-24 08:05:04,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:05:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:05:04,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:05:04,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:05:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:04,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:05:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:05:04,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348095398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:05:04,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:05:04,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-24 08:05:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396191269] [2023-08-24 08:05:04,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:05:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:05:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:05:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:05:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:05:04,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:05:04,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 2896 transitions, 106107 flow. Second operand has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:04,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:05:04,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:05:04,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:05:13,802 INFO L124 PetriNetUnfolderBase]: 6278/10195 cut-off events. [2023-08-24 08:05:13,803 INFO L125 PetriNetUnfolderBase]: For 616745/616745 co-relation queries the response was YES. [2023-08-24 08:05:13,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158692 conditions, 10195 events. 6278/10195 cut-off events. For 616745/616745 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 70597 event pairs, 322 based on Foata normal form. 32/10227 useless extension candidates. Maximal degree in co-relation 158430. Up to 7201 conditions per place. [2023-08-24 08:05:14,133 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2221 selfloop transitions, 908 changer transitions 6/3135 dead transitions. [2023-08-24 08:05:14,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 3135 transitions, 120137 flow [2023-08-24 08:05:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:05:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:05:14,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3609 transitions. [2023-08-24 08:05:14,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181438998957247 [2023-08-24 08:05:14,136 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3609 transitions. [2023-08-24 08:05:14,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3609 transitions. [2023-08-24 08:05:14,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:05:14,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3609 transitions. [2023-08-24 08:05:14,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.85714285714286) internal successors, (3609), 21 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:14,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:14,142 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:14,142 INFO L175 Difference]: Start difference. First operand has 753 places, 2896 transitions, 106107 flow. Second operand 21 states and 3609 transitions. [2023-08-24 08:05:14,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 3135 transitions, 120137 flow [2023-08-24 08:05:24,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 3135 transitions, 116887 flow, removed 1102 selfloop flow, removed 10 redundant places. [2023-08-24 08:05:24,590 INFO L231 Difference]: Finished difference. Result has 770 places, 3076 transitions, 112581 flow [2023-08-24 08:05:24,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=103734, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=743, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2097, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=112581, PETRI_PLACES=770, PETRI_TRANSITIONS=3076} [2023-08-24 08:05:24,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 750 predicate places. [2023-08-24 08:05:24,592 INFO L495 AbstractCegarLoop]: Abstraction has has 770 places, 3076 transitions, 112581 flow [2023-08-24 08:05:24,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:24,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:05:24,593 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:05:24,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-24 08:05:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:24,794 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:05:24,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:05:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash -606280111, now seen corresponding path program 73 times [2023-08-24 08:05:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:05:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661182629] [2023-08-24 08:05:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:05:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:05:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:05:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:24,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:05:24,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661182629] [2023-08-24 08:05:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661182629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:05:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308207247] [2023-08-24 08:05:24,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:05:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:05:24,870 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:05:24,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-24 08:05:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:05:24,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:05:24,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:05:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:25,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:05:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:25,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308207247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:05:25,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:05:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-24 08:05:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78127576] [2023-08-24 08:05:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:05:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:05:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:05:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:05:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:05:25,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:05:25,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 3076 transitions, 112581 flow. Second operand has 18 states, 18 states have (on average 168.77777777777777) internal successors, (3038), 18 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:25,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:05:25,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:05:25,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:05:34,716 INFO L124 PetriNetUnfolderBase]: 6481/10496 cut-off events. [2023-08-24 08:05:34,716 INFO L125 PetriNetUnfolderBase]: For 578058/578058 co-relation queries the response was YES. [2023-08-24 08:05:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162047 conditions, 10496 events. 6481/10496 cut-off events. For 578058/578058 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 72775 event pairs, 291 based on Foata normal form. 36/10532 useless extension candidates. Maximal degree in co-relation 161778. Up to 8383 conditions per place. [2023-08-24 08:05:34,896 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2584 selfloop transitions, 646 changer transitions 0/3230 dead transitions. [2023-08-24 08:05:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 3230 transitions, 122402 flow [2023-08-24 08:05:34,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 08:05:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 08:05:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4959 transitions. [2023-08-24 08:05:34,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-08-24 08:05:34,899 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4959 transitions. [2023-08-24 08:05:34,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4959 transitions. [2023-08-24 08:05:34,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:05:34,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4959 transitions. [2023-08-24 08:05:34,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 171.0) internal successors, (4959), 29 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:34,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 411.0) internal successors, (12330), 30 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:34,907 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 411.0) internal successors, (12330), 30 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:34,907 INFO L175 Difference]: Start difference. First operand has 770 places, 3076 transitions, 112581 flow. Second operand 29 states and 4959 transitions. [2023-08-24 08:05:34,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 3230 transitions, 122402 flow [2023-08-24 08:05:45,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 3230 transitions, 120118 flow, removed 782 selfloop flow, removed 11 redundant places. [2023-08-24 08:05:45,358 INFO L231 Difference]: Finished difference. Result has 798 places, 3185 transitions, 115056 flow [2023-08-24 08:05:45,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=110319, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=115056, PETRI_PLACES=798, PETRI_TRANSITIONS=3185} [2023-08-24 08:05:45,360 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 778 predicate places. [2023-08-24 08:05:45,360 INFO L495 AbstractCegarLoop]: Abstraction has has 798 places, 3185 transitions, 115056 flow [2023-08-24 08:05:45,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.77777777777777) internal successors, (3038), 18 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:45,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:05:45,361 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:05:45,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-24 08:05:45,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:45,566 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:05:45,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:05:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1770902720, now seen corresponding path program 74 times [2023-08-24 08:05:45,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:05:45,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562799483] [2023-08-24 08:05:45,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:05:45,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:05:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:05:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:45,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:05:45,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562799483] [2023-08-24 08:05:45,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562799483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:05:45,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239932485] [2023-08-24 08:05:45,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:05:45,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:05:45,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:05:45,649 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:05:45,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-24 08:05:45,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:05:45,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:05:45,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:05:45,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:05:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:45,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:05:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:05:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239932485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:05:45,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:05:45,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:05:45,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374760042] [2023-08-24 08:05:45,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:05:45,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:05:45,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:05:45,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:05:45,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:05:45,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:05:45,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 798 places, 3185 transitions, 115056 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:45,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:05:45,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:05:45,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:05:55,681 INFO L124 PetriNetUnfolderBase]: 6571/10626 cut-off events. [2023-08-24 08:05:55,681 INFO L125 PetriNetUnfolderBase]: For 565263/565263 co-relation queries the response was YES. [2023-08-24 08:05:55,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162795 conditions, 10626 events. 6571/10626 cut-off events. For 565263/565263 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 73696 event pairs, 870 based on Foata normal form. 8/10634 useless extension candidates. Maximal degree in co-relation 162514. Up to 7158 conditions per place. [2023-08-24 08:05:55,870 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2309 selfloop transitions, 963 changer transitions 9/3281 dead transitions. [2023-08-24 08:05:55,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 3281 transitions, 124249 flow [2023-08-24 08:05:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:05:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:05:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2918 transitions. [2023-08-24 08:05:55,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41763274652926863 [2023-08-24 08:05:55,873 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2918 transitions. [2023-08-24 08:05:55,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2918 transitions. [2023-08-24 08:05:55,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:05:55,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2918 transitions. [2023-08-24 08:05:55,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 171.64705882352942) internal successors, (2918), 17 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:55,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:55,878 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 411.0) internal successors, (7398), 18 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:05:55,878 INFO L175 Difference]: Start difference. First operand has 798 places, 3185 transitions, 115056 flow. Second operand 17 states and 2918 transitions. [2023-08-24 08:05:55,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 3281 transitions, 124249 flow [2023-08-24 08:06:05,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 3281 transitions, 123486 flow, removed 190 selfloop flow, removed 7 redundant places. [2023-08-24 08:06:05,896 INFO L231 Difference]: Finished difference. Result has 810 places, 3225 transitions, 118402 flow [2023-08-24 08:06:05,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=114303, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=912, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=118402, PETRI_PLACES=810, PETRI_TRANSITIONS=3225} [2023-08-24 08:06:05,898 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-08-24 08:06:05,898 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 3225 transitions, 118402 flow [2023-08-24 08:06:05,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:05,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:06:05,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:06:05,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-08-24 08:06:06,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:06,100 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:06:06,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:06:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash -226941987, now seen corresponding path program 75 times [2023-08-24 08:06:06,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:06:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820653868] [2023-08-24 08:06:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:06:06,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:06:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:06:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:06:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820653868] [2023-08-24 08:06:06,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820653868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:06:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874367363] [2023-08-24 08:06:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:06:06,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:06,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:06:06,180 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:06:06,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-24 08:06:06,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:06:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:06:06,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:06:06,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:06:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:06,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:06:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:06:06,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874367363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:06:06,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:06:06,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-08-24 08:06:06,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788558728] [2023-08-24 08:06:06,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:06:06,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:06:06,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:06:06,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:06:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:06:06,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:06:06,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 3225 transitions, 118402 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:06,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:06:06,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:06:06,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:06:16,816 INFO L124 PetriNetUnfolderBase]: 6746/10889 cut-off events. [2023-08-24 08:06:16,816 INFO L125 PetriNetUnfolderBase]: For 621337/621337 co-relation queries the response was YES. [2023-08-24 08:06:16,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169543 conditions, 10889 events. 6746/10889 cut-off events. For 621337/621337 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 75528 event pairs, 339 based on Foata normal form. 20/10909 useless extension candidates. Maximal degree in co-relation 169258. Up to 7238 conditions per place. [2023-08-24 08:06:17,027 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2292 selfloop transitions, 1076 changer transitions 8/3376 dead transitions. [2023-08-24 08:06:17,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 3376 transitions, 129290 flow [2023-08-24 08:06:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:06:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:06:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3782 transitions. [2023-08-24 08:06:17,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41827029418270295 [2023-08-24 08:06:17,030 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3782 transitions. [2023-08-24 08:06:17,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3782 transitions. [2023-08-24 08:06:17,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:06:17,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3782 transitions. [2023-08-24 08:06:17,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 171.9090909090909) internal successors, (3782), 22 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:17,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:17,036 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 411.0) internal successors, (9453), 23 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:17,036 INFO L175 Difference]: Start difference. First operand has 810 places, 3225 transitions, 118402 flow. Second operand 22 states and 3782 transitions. [2023-08-24 08:06:17,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 3376 transitions, 129290 flow [2023-08-24 08:06:27,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 817 places, 3376 transitions, 127886 flow, removed 175 selfloop flow, removed 14 redundant places. [2023-08-24 08:06:27,510 INFO L231 Difference]: Finished difference. Result has 824 places, 3309 transitions, 123314 flow [2023-08-24 08:06:27,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=117026, PETRI_DIFFERENCE_MINUEND_PLACES=796, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=123314, PETRI_PLACES=824, PETRI_TRANSITIONS=3309} [2023-08-24 08:06:27,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 804 predicate places. [2023-08-24 08:06:27,512 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 3309 transitions, 123314 flow [2023-08-24 08:06:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:06:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:06:27,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-08-24 08:06:27,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-08-24 08:06:27,713 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:06:27,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:06:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1784494097, now seen corresponding path program 76 times [2023-08-24 08:06:27,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:06:27,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077052725] [2023-08-24 08:06:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:06:27,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:06:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:06:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:06:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077052725] [2023-08-24 08:06:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077052725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:06:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032244505] [2023-08-24 08:06:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:06:27,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:27,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:06:27,783 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:06:27,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-24 08:06:27,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:06:27,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:06:27,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:06:27,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:06:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:27,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:06:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032244505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:06:27,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:06:27,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:06:27,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287496869] [2023-08-24 08:06:27,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:06:27,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:06:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:06:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:06:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:06:27,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:06:28,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 3309 transitions, 123314 flow. Second operand has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:28,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:06:28,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:06:28,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:06:39,293 INFO L124 PetriNetUnfolderBase]: 6912/11129 cut-off events. [2023-08-24 08:06:39,294 INFO L125 PetriNetUnfolderBase]: For 660349/660349 co-relation queries the response was YES. [2023-08-24 08:06:39,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176864 conditions, 11129 events. 6912/11129 cut-off events. For 660349/660349 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 77159 event pairs, 341 based on Foata normal form. 32/11161 useless extension candidates. Maximal degree in co-relation 176572. Up to 7493 conditions per place. [2023-08-24 08:06:39,507 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2391 selfloop transitions, 1051 changer transitions 16/3458 dead transitions. [2023-08-24 08:06:39,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 3458 transitions, 134846 flow [2023-08-24 08:06:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:06:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:06:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3611 transitions. [2023-08-24 08:06:39,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183756227551848 [2023-08-24 08:06:39,509 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3611 transitions. [2023-08-24 08:06:39,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3611 transitions. [2023-08-24 08:06:39,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:06:39,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3611 transitions. [2023-08-24 08:06:39,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.95238095238096) internal successors, (3611), 21 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:39,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:39,515 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:39,515 INFO L175 Difference]: Start difference. First operand has 824 places, 3309 transitions, 123314 flow. Second operand 21 states and 3611 transitions. [2023-08-24 08:06:39,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 3458 transitions, 134846 flow [2023-08-24 08:06:51,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 3458 transitions, 132817 flow, removed 554 selfloop flow, removed 13 redundant places. [2023-08-24 08:06:51,210 INFO L231 Difference]: Finished difference. Result has 836 places, 3389 transitions, 127755 flow [2023-08-24 08:06:51,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=121621, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=127755, PETRI_PLACES=836, PETRI_TRANSITIONS=3389} [2023-08-24 08:06:51,211 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 816 predicate places. [2023-08-24 08:06:51,212 INFO L495 AbstractCegarLoop]: Abstraction has has 836 places, 3389 transitions, 127755 flow [2023-08-24 08:06:51,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.75) internal successors, (2700), 16 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:51,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:06:51,212 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:06:51,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-08-24 08:06:51,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-24 08:06:51,413 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:06:51,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:06:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash -82191279, now seen corresponding path program 77 times [2023-08-24 08:06:51,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:06:51,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451500662] [2023-08-24 08:06:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:06:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:06:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:06:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:51,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:06:51,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451500662] [2023-08-24 08:06:51,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451500662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:06:51,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434664609] [2023-08-24 08:06:51,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:06:51,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:06:51,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:06:51,477 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:06:51,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-24 08:06:51,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:06:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:06:51,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:06:51,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:06:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:51,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:06:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:06:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434664609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:06:51,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:06:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-08-24 08:06:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287087597] [2023-08-24 08:06:51,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:06:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:06:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:06:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:06:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:06:51,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:06:51,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 836 places, 3389 transitions, 127755 flow. Second operand has 16 states, 16 states have (on average 168.875) internal successors, (2702), 16 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:06:51,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:06:51,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:06:51,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:07:03,408 INFO L124 PetriNetUnfolderBase]: 6979/11222 cut-off events. [2023-08-24 08:07:03,408 INFO L125 PetriNetUnfolderBase]: For 657779/657779 co-relation queries the response was YES. [2023-08-24 08:07:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178395 conditions, 11222 events. 6979/11222 cut-off events. For 657779/657779 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 77658 event pairs, 281 based on Foata normal form. 40/11262 useless extension candidates. Maximal degree in co-relation 178100. Up to 8276 conditions per place. [2023-08-24 08:07:03,740 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2535 selfloop transitions, 957 changer transitions 0/3492 dead transitions. [2023-08-24 08:07:03,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 857 places, 3492 transitions, 136640 flow [2023-08-24 08:07:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:07:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:07:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4118 transitions. [2023-08-24 08:07:03,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41747769667477697 [2023-08-24 08:07:03,743 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4118 transitions. [2023-08-24 08:07:03,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4118 transitions. [2023-08-24 08:07:03,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:03,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4118 transitions. [2023-08-24 08:07:03,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 171.58333333333334) internal successors, (4118), 24 states have internal predecessors, (4118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:03,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:03,750 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:03,750 INFO L175 Difference]: Start difference. First operand has 836 places, 3389 transitions, 127755 flow. Second operand 24 states and 4118 transitions. [2023-08-24 08:07:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 857 places, 3492 transitions, 136640 flow [2023-08-24 08:07:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 850 places, 3492 transitions, 135516 flow, removed 244 selfloop flow, removed 7 redundant places. [2023-08-24 08:07:14,939 INFO L231 Difference]: Finished difference. Result has 856 places, 3448 transitions, 130828 flow [2023-08-24 08:07:14,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=125727, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=886, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=130828, PETRI_PLACES=856, PETRI_TRANSITIONS=3448} [2023-08-24 08:07:14,940 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 836 predicate places. [2023-08-24 08:07:14,940 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 3448 transitions, 130828 flow [2023-08-24 08:07:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.875) internal successors, (2702), 16 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:14,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:07:14,941 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:07:14,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-08-24 08:07:15,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:15,141 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:07:15,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:07:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1298170386, now seen corresponding path program 78 times [2023-08-24 08:07:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:07:15,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000591416] [2023-08-24 08:07:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:07:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:07:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:07:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000591416] [2023-08-24 08:07:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000591416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:07:15,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400211876] [2023-08-24 08:07:15,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:07:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:15,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:07:15,204 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:07:15,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-24 08:07:15,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:07:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:07:15,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:07:15,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:07:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:15,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:07:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:07:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400211876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:07:15,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:07:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2023-08-24 08:07:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643526054] [2023-08-24 08:07:15,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:07:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:07:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:07:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:07:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:07:15,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:07:15,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 3448 transitions, 130828 flow. Second operand has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:15,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:07:15,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:07:15,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:07:27,822 INFO L124 PetriNetUnfolderBase]: 7216/11525 cut-off events. [2023-08-24 08:07:27,822 INFO L125 PetriNetUnfolderBase]: For 695204/695204 co-relation queries the response was YES. [2023-08-24 08:07:27,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185217 conditions, 11525 events. 7216/11525 cut-off events. For 695204/695204 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 79401 event pairs, 1697 based on Foata normal form. 22/11547 useless extension candidates. Maximal degree in co-relation 184916. Up to 10601 conditions per place. [2023-08-24 08:07:28,057 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 3161 selfloop transitions, 427 changer transitions 9/3597 dead transitions. [2023-08-24 08:07:28,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 871 places, 3597 transitions, 143307 flow [2023-08-24 08:07:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:07:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:07:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2743 transitions. [2023-08-24 08:07:28,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171228710462287 [2023-08-24 08:07:28,060 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2743 transitions. [2023-08-24 08:07:28,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2743 transitions. [2023-08-24 08:07:28,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:28,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2743 transitions. [2023-08-24 08:07:28,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 171.4375) internal successors, (2743), 16 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:28,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:28,065 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 411.0) internal successors, (6987), 17 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:28,065 INFO L175 Difference]: Start difference. First operand has 856 places, 3448 transitions, 130828 flow. Second operand 16 states and 2743 transitions. [2023-08-24 08:07:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 871 places, 3597 transitions, 143307 flow [2023-08-24 08:07:41,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 859 places, 3597 transitions, 142259 flow, removed 171 selfloop flow, removed 12 redundant places. [2023-08-24 08:07:41,274 INFO L231 Difference]: Finished difference. Result has 865 places, 3554 transitions, 135906 flow [2023-08-24 08:07:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=129500, PETRI_DIFFERENCE_MINUEND_PLACES=844, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=135906, PETRI_PLACES=865, PETRI_TRANSITIONS=3554} [2023-08-24 08:07:41,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 845 predicate places. [2023-08-24 08:07:41,276 INFO L495 AbstractCegarLoop]: Abstraction has has 865 places, 3554 transitions, 135906 flow [2023-08-24 08:07:41,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:41,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:07:41,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:07:41,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-24 08:07:41,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2023-08-24 08:07:41,477 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:07:41,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:07:41,478 INFO L85 PathProgramCache]: Analyzing trace with hash -79181661, now seen corresponding path program 79 times [2023-08-24 08:07:41,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:07:41,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071226402] [2023-08-24 08:07:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:07:41,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:07:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:07:41,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071226402] [2023-08-24 08:07:41,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071226402] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:07:41,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029641892] [2023-08-24 08:07:41,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:07:41,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:07:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:07:41,543 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:07:41,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-24 08:07:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:07:41,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:07:41,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:07:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:41,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:07:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:07:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029641892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:07:41,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:07:41,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-08-24 08:07:41,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930102542] [2023-08-24 08:07:41,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:07:41,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:07:41,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:07:41,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:07:41,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:07:41,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:07:41,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 865 places, 3554 transitions, 135906 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:41,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:07:41,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:07:41,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:07:54,972 INFO L124 PetriNetUnfolderBase]: 7234/11543 cut-off events. [2023-08-24 08:07:54,972 INFO L125 PetriNetUnfolderBase]: For 703409/703409 co-relation queries the response was YES. [2023-08-24 08:07:55,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185565 conditions, 11543 events. 7234/11543 cut-off events. For 703409/703409 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 79207 event pairs, 250 based on Foata normal form. 26/11569 useless extension candidates. Maximal degree in co-relation 185260. Up to 8690 conditions per place. [2023-08-24 08:07:55,196 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2631 selfloop transitions, 995 changer transitions 1/3627 dead transitions. [2023-08-24 08:07:55,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 3627 transitions, 144272 flow [2023-08-24 08:07:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 08:07:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 08:07:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4450 transitions. [2023-08-24 08:07:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41643271570278867 [2023-08-24 08:07:55,199 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4450 transitions. [2023-08-24 08:07:55,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4450 transitions. [2023-08-24 08:07:55,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:07:55,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4450 transitions. [2023-08-24 08:07:55,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.15384615384616) internal successors, (4450), 26 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:55,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:55,206 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:07:55,206 INFO L175 Difference]: Start difference. First operand has 865 places, 3554 transitions, 135906 flow. Second operand 26 states and 4450 transitions. [2023-08-24 08:07:55,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 3627 transitions, 144272 flow [2023-08-24 08:08:07,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 877 places, 3627 transitions, 143759 flow, removed 186 selfloop flow, removed 10 redundant places. [2023-08-24 08:08:07,346 INFO L231 Difference]: Finished difference. Result has 880 places, 3588 transitions, 138480 flow [2023-08-24 08:08:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=135067, PETRI_DIFFERENCE_MINUEND_PLACES=852, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=138480, PETRI_PLACES=880, PETRI_TRANSITIONS=3588} [2023-08-24 08:08:07,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 860 predicate places. [2023-08-24 08:08:07,349 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 3588 transitions, 138480 flow [2023-08-24 08:08:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:08:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:08:07,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-08-24 08:08:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:07,554 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:08:07,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:08:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash -905895552, now seen corresponding path program 80 times [2023-08-24 08:08:07,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:08:07,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437494170] [2023-08-24 08:08:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:08:07,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:08:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:08:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:07,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:08:07,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437494170] [2023-08-24 08:08:07,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437494170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:08:07,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129744252] [2023-08-24 08:08:07,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:08:07,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:07,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:08:07,627 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:08:07,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-24 08:08:07,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:08:07,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:08:07,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:08:07,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:08:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:07,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:08:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:07,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129744252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:08:07,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:08:07,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-08-24 08:08:07,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639175020] [2023-08-24 08:08:07,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:08:07,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:08:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:08:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:08:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:08:07,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:08:07,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 3588 transitions, 138480 flow. Second operand has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:08:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:08:07,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:08:20,959 INFO L124 PetriNetUnfolderBase]: 7278/11607 cut-off events. [2023-08-24 08:08:20,959 INFO L125 PetriNetUnfolderBase]: For 717450/717450 co-relation queries the response was YES. [2023-08-24 08:08:21,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188944 conditions, 11607 events. 7278/11607 cut-off events. For 717450/717450 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 79802 event pairs, 1371 based on Foata normal form. 12/11619 useless extension candidates. Maximal degree in co-relation 188637. Up to 9579 conditions per place. [2023-08-24 08:08:21,206 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2776 selfloop transitions, 866 changer transitions 6/3648 dead transitions. [2023-08-24 08:08:21,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 3648 transitions, 147467 flow [2023-08-24 08:08:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:08:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:08:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3086 transitions. [2023-08-24 08:08:21,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41713976750473103 [2023-08-24 08:08:21,209 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3086 transitions. [2023-08-24 08:08:21,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3086 transitions. [2023-08-24 08:08:21,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:08:21,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3086 transitions. [2023-08-24 08:08:21,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 171.44444444444446) internal successors, (3086), 18 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:21,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 411.0) internal successors, (7809), 19 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:21,214 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 411.0) internal successors, (7809), 19 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:21,214 INFO L175 Difference]: Start difference. First operand has 880 places, 3588 transitions, 138480 flow. Second operand 18 states and 3086 transitions. [2023-08-24 08:08:21,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 3648 transitions, 147467 flow [2023-08-24 08:08:34,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 882 places, 3648 transitions, 146563 flow, removed 108 selfloop flow, removed 14 redundant places. [2023-08-24 08:08:34,149 INFO L231 Difference]: Finished difference. Result has 888 places, 3606 transitions, 141406 flow [2023-08-24 08:08:34,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=137505, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=839, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=141406, PETRI_PLACES=888, PETRI_TRANSITIONS=3606} [2023-08-24 08:08:34,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 868 predicate places. [2023-08-24 08:08:34,151 INFO L495 AbstractCegarLoop]: Abstraction has has 888 places, 3606 transitions, 141406 flow [2023-08-24 08:08:34,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.8125) internal successors, (2701), 16 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:34,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:08:34,152 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:08:34,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-08-24 08:08:34,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:34,352 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:08:34,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:08:34,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2138017149, now seen corresponding path program 81 times [2023-08-24 08:08:34,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:08:34,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766900687] [2023-08-24 08:08:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:08:34,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:08:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:08:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:34,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:08:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766900687] [2023-08-24 08:08:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766900687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:08:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462624199] [2023-08-24 08:08:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:08:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:08:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:08:34,426 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:08:34,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-24 08:08:34,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 08:08:34,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:08:34,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:08:34,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:08:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:34,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:08:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:08:34,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462624199] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:08:34,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:08:34,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-24 08:08:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150408616] [2023-08-24 08:08:34,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:08:34,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:08:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:08:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:08:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:08:34,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:08:34,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 888 places, 3606 transitions, 141406 flow. Second operand has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:34,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:08:34,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:08:34,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:08:47,897 INFO L124 PetriNetUnfolderBase]: 7248/11577 cut-off events. [2023-08-24 08:08:47,897 INFO L125 PetriNetUnfolderBase]: For 738407/738407 co-relation queries the response was YES. [2023-08-24 08:08:48,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189666 conditions, 11577 events. 7248/11577 cut-off events. For 738407/738407 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 79693 event pairs, 271 based on Foata normal form. 66/11643 useless extension candidates. Maximal degree in co-relation 189357. Up to 7937 conditions per place. [2023-08-24 08:08:48,133 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2391 selfloop transitions, 1264 changer transitions 0/3655 dead transitions. [2023-08-24 08:08:48,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 909 places, 3655 transitions, 148417 flow [2023-08-24 08:08:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:08:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:08:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4287 transitions. [2023-08-24 08:08:48,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41722627737226275 [2023-08-24 08:08:48,135 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4287 transitions. [2023-08-24 08:08:48,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4287 transitions. [2023-08-24 08:08:48,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:08:48,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4287 transitions. [2023-08-24 08:08:48,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.48) internal successors, (4287), 25 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:48,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:48,142 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:08:48,142 INFO L175 Difference]: Start difference. First operand has 888 places, 3606 transitions, 141406 flow. Second operand 25 states and 4287 transitions. [2023-08-24 08:08:48,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 909 places, 3655 transitions, 148417 flow [2023-08-24 08:09:00,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 894 places, 3655 transitions, 147616 flow, removed 53 selfloop flow, removed 15 redundant places. [2023-08-24 08:09:00,750 INFO L231 Difference]: Finished difference. Result has 899 places, 3603 transitions, 143288 flow [2023-08-24 08:09:00,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=138556, PETRI_DIFFERENCE_MINUEND_PLACES=870, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=143288, PETRI_PLACES=899, PETRI_TRANSITIONS=3603} [2023-08-24 08:09:00,752 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 879 predicate places. [2023-08-24 08:09:00,752 INFO L495 AbstractCegarLoop]: Abstraction has has 899 places, 3603 transitions, 143288 flow [2023-08-24 08:09:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.86666666666667) internal successors, (2533), 15 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:09:00,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:09:00,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-24 08:09:00,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:00,953 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:09:00,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:09:00,953 INFO L85 PathProgramCache]: Analyzing trace with hash 940768895, now seen corresponding path program 82 times [2023-08-24 08:09:00,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:09:00,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635518419] [2023-08-24 08:09:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:09:00,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:09:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:09:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:01,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:09:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635518419] [2023-08-24 08:09:01,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635518419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:09:01,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406159060] [2023-08-24 08:09:01,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:09:01,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:09:01,025 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:09:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-24 08:09:01,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:09:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:09:01,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:09:01,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:09:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:01,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:09:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:01,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406159060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:09:01,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:09:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 08:09:01,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896302135] [2023-08-24 08:09:01,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:09:01,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:09:01,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:09:01,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:09:01,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:09:01,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:09:01,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 3603 transitions, 143288 flow. Second operand has 20 states, 20 states have (on average 168.65) internal successors, (3373), 20 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:01,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:09:01,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:09:01,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:09:15,903 INFO L124 PetriNetUnfolderBase]: 7846/12541 cut-off events. [2023-08-24 08:09:15,903 INFO L125 PetriNetUnfolderBase]: For 778807/778807 co-relation queries the response was YES. [2023-08-24 08:09:16,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207137 conditions, 12541 events. 7846/12541 cut-off events. For 778807/778807 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 87762 event pairs, 301 based on Foata normal form. 28/12569 useless extension candidates. Maximal degree in co-relation 206825. Up to 8993 conditions per place. [2023-08-24 08:09:16,171 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2798 selfloop transitions, 1195 changer transitions 0/3993 dead transitions. [2023-08-24 08:09:16,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 3993 transitions, 163850 flow [2023-08-24 08:09:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 08:09:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 08:09:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 6152 transitions. [2023-08-24 08:09:16,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157880508245472 [2023-08-24 08:09:16,177 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 6152 transitions. [2023-08-24 08:09:16,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 6152 transitions. [2023-08-24 08:09:16,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:09:16,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 6152 transitions. [2023-08-24 08:09:16,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 170.88888888888889) internal successors, (6152), 36 states have internal predecessors, (6152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:16,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 411.0) internal successors, (15207), 37 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:16,191 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 411.0) internal successors, (15207), 37 states have internal predecessors, (15207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:16,191 INFO L175 Difference]: Start difference. First operand has 899 places, 3603 transitions, 143288 flow. Second operand 36 states and 6152 transitions. [2023-08-24 08:09:16,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 3993 transitions, 163850 flow [2023-08-24 08:09:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 919 places, 3993 transitions, 162410 flow, removed 83 selfloop flow, removed 14 redundant places. [2023-08-24 08:09:30,993 INFO L231 Difference]: Finished difference. Result has 930 places, 3947 transitions, 157801 flow [2023-08-24 08:09:30,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=141745, PETRI_DIFFERENCE_MINUEND_PLACES=884, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=157801, PETRI_PLACES=930, PETRI_TRANSITIONS=3947} [2023-08-24 08:09:30,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 910 predicate places. [2023-08-24 08:09:30,995 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 3947 transitions, 157801 flow [2023-08-24 08:09:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.65) internal successors, (3373), 20 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:30,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:09:30,996 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:09:31,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-08-24 08:09:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:31,196 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:09:31,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:09:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1764093583, now seen corresponding path program 83 times [2023-08-24 08:09:31,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:09:31,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617323948] [2023-08-24 08:09:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:09:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:09:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:09:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:31,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:09:31,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617323948] [2023-08-24 08:09:31,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617323948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:09:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104741837] [2023-08-24 08:09:31,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:09:31,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:09:31,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:09:31,265 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:09:31,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-24 08:09:31,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:09:31,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:09:31,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:09:31,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:09:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:31,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:09:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:09:31,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104741837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:09:31,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:09:31,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 08:09:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123852216] [2023-08-24 08:09:31,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:09:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:09:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:09:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:09:31,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:09:31,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:09:31,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 3947 transitions, 157801 flow. Second operand has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:31,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:09:31,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:09:31,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:09:46,491 INFO L124 PetriNetUnfolderBase]: 7984/12763 cut-off events. [2023-08-24 08:09:46,491 INFO L125 PetriNetUnfolderBase]: For 808992/808992 co-relation queries the response was YES. [2023-08-24 08:09:46,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213312 conditions, 12763 events. 7984/12763 cut-off events. For 808992/808992 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 89703 event pairs, 449 based on Foata normal form. 12/12775 useless extension candidates. Maximal degree in co-relation 212989. Up to 7616 conditions per place. [2023-08-24 08:09:46,753 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2578 selfloop transitions, 1489 changer transitions 20/4087 dead transitions. [2023-08-24 08:09:46,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 954 places, 4087 transitions, 169760 flow [2023-08-24 08:09:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:09:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:09:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4294 transitions. [2023-08-24 08:09:46,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179075425790754 [2023-08-24 08:09:46,756 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4294 transitions. [2023-08-24 08:09:46,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4294 transitions. [2023-08-24 08:09:46,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:09:46,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4294 transitions. [2023-08-24 08:09:46,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.76) internal successors, (4294), 25 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:46,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:46,763 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 411.0) internal successors, (10686), 26 states have internal predecessors, (10686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:09:46,763 INFO L175 Difference]: Start difference. First operand has 930 places, 3947 transitions, 157801 flow. Second operand 25 states and 4294 transitions. [2023-08-24 08:09:46,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 954 places, 4087 transitions, 169760 flow [2023-08-24 08:10:01,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 943 places, 4087 transitions, 169028 flow, removed 287 selfloop flow, removed 11 redundant places. [2023-08-24 08:10:01,787 INFO L231 Difference]: Finished difference. Result has 949 places, 4001 transitions, 163949 flow [2023-08-24 08:10:01,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=157094, PETRI_DIFFERENCE_MINUEND_PLACES=919, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=163949, PETRI_PLACES=949, PETRI_TRANSITIONS=4001} [2023-08-24 08:10:01,789 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 929 predicate places. [2023-08-24 08:10:01,789 INFO L495 AbstractCegarLoop]: Abstraction has has 949 places, 4001 transitions, 163949 flow [2023-08-24 08:10:01,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 168.55) internal successors, (3371), 20 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:01,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:10:01,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:10:01,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-08-24 08:10:01,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:01,990 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:10:01,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:10:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1091153777, now seen corresponding path program 84 times [2023-08-24 08:10:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:10:01,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931909803] [2023-08-24 08:10:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:10:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:10:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:02,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:10:02,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931909803] [2023-08-24 08:10:02,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931909803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:10:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767546890] [2023-08-24 08:10:02,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:10:02,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:02,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:10:02,060 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:10:02,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-24 08:10:02,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:10:02,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:10:02,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:10:02,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:10:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:02,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:10:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:02,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767546890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:10:02,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:10:02,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-08-24 08:10:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725881675] [2023-08-24 08:10:02,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:10:02,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:10:02,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:10:02,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:10:02,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:10:02,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:10:02,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 949 places, 4001 transitions, 163949 flow. Second operand has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:02,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:10:02,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:10:02,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:10:18,297 INFO L124 PetriNetUnfolderBase]: 8236/13129 cut-off events. [2023-08-24 08:10:18,297 INFO L125 PetriNetUnfolderBase]: For 879997/879997 co-relation queries the response was YES. [2023-08-24 08:10:18,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224354 conditions, 13129 events. 8236/13129 cut-off events. For 879997/879997 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 92197 event pairs, 284 based on Foata normal form. 18/13147 useless extension candidates. Maximal degree in co-relation 224025. Up to 8347 conditions per place. [2023-08-24 08:10:18,568 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2497 selfloop transitions, 1711 changer transitions 0/4208 dead transitions. [2023-08-24 08:10:18,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 971 places, 4208 transitions, 179388 flow [2023-08-24 08:10:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 08:10:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 08:10:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4622 transitions. [2023-08-24 08:10:18,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165089663873119 [2023-08-24 08:10:18,580 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4622 transitions. [2023-08-24 08:10:18,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4622 transitions. [2023-08-24 08:10:18,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:10:18,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4622 transitions. [2023-08-24 08:10:18,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 171.1851851851852) internal successors, (4622), 27 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:18,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 411.0) internal successors, (11508), 28 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:18,591 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 411.0) internal successors, (11508), 28 states have internal predecessors, (11508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:18,591 INFO L175 Difference]: Start difference. First operand has 949 places, 4001 transitions, 163949 flow. Second operand 27 states and 4622 transitions. [2023-08-24 08:10:18,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 971 places, 4208 transitions, 179388 flow [2023-08-24 08:10:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 955 places, 4208 transitions, 177833 flow, removed 226 selfloop flow, removed 16 redundant places. [2023-08-24 08:10:34,804 INFO L231 Difference]: Finished difference. Result has 962 places, 4167 transitions, 174105 flow [2023-08-24 08:10:34,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=162442, PETRI_DIFFERENCE_MINUEND_PLACES=929, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=174105, PETRI_PLACES=962, PETRI_TRANSITIONS=4167} [2023-08-24 08:10:34,806 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 942 predicate places. [2023-08-24 08:10:34,806 INFO L495 AbstractCegarLoop]: Abstraction has has 962 places, 4167 transitions, 174105 flow [2023-08-24 08:10:34,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:34,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:10:34,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:10:34,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-08-24 08:10:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2023-08-24 08:10:35,012 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:10:35,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:10:35,012 INFO L85 PathProgramCache]: Analyzing trace with hash 36551743, now seen corresponding path program 85 times [2023-08-24 08:10:35,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:10:35,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326822889] [2023-08-24 08:10:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:10:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:10:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:35,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:10:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326822889] [2023-08-24 08:10:35,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326822889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:10:35,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129159931] [2023-08-24 08:10:35,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:10:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:10:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:10:35,081 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:10:35,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-08-24 08:10:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:10:35,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:10:35,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:10:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:35,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:10:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:10:35,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129159931] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:10:35,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:10:35,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-24 08:10:35,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427736748] [2023-08-24 08:10:35,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:10:35,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 08:10:35,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:10:35,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 08:10:35,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 08:10:35,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:10:35,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 962 places, 4167 transitions, 174105 flow. Second operand has 16 states, 16 states have (on average 168.875) internal successors, (2702), 16 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:35,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:10:35,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:10:35,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:10:51,882 INFO L124 PetriNetUnfolderBase]: 8324/13327 cut-off events. [2023-08-24 08:10:51,882 INFO L125 PetriNetUnfolderBase]: For 877683/877683 co-relation queries the response was YES. [2023-08-24 08:10:52,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230352 conditions, 13327 events. 8324/13327 cut-off events. For 877683/877683 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 94531 event pairs, 329 based on Foata normal form. 4/13331 useless extension candidates. Maximal degree in co-relation 230019. Up to 9484 conditions per place. [2023-08-24 08:10:52,167 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 3169 selfloop transitions, 1114 changer transitions 0/4283 dead transitions. [2023-08-24 08:10:52,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 979 places, 4283 transitions, 185384 flow [2023-08-24 08:10:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:10:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:10:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3254 transitions. [2023-08-24 08:10:52,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166986810090921 [2023-08-24 08:10:52,169 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3254 transitions. [2023-08-24 08:10:52,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3254 transitions. [2023-08-24 08:10:52,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:10:52,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3254 transitions. [2023-08-24 08:10:52,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.26315789473685) internal successors, (3254), 19 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:10:52,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:10:52,174 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:10:52,175 INFO L175 Difference]: Start difference. First operand has 962 places, 4167 transitions, 174105 flow. Second operand 19 states and 3254 transitions. [2023-08-24 08:10:52,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 979 places, 4283 transitions, 185384 flow [2023-08-24 08:11:09,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 4283 transitions, 184196 flow, removed 270 selfloop flow, removed 13 redundant places. [2023-08-24 08:11:09,621 INFO L231 Difference]: Finished difference. Result has 971 places, 4233 transitions, 177592 flow [2023-08-24 08:11:09,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=172855, PETRI_DIFFERENCE_MINUEND_PLACES=948, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3060, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=177592, PETRI_PLACES=971, PETRI_TRANSITIONS=4233} [2023-08-24 08:11:09,623 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 951 predicate places. [2023-08-24 08:11:09,623 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 4233 transitions, 177592 flow [2023-08-24 08:11:09,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 168.875) internal successors, (2702), 16 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:09,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:11:09,623 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:11:09,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2023-08-24 08:11:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-08-24 08:11:09,824 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:11:09,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:11:09,825 INFO L85 PathProgramCache]: Analyzing trace with hash -436257379, now seen corresponding path program 86 times [2023-08-24 08:11:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:11:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715480624] [2023-08-24 08:11:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:11:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:11:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:11:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:09,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:11:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715480624] [2023-08-24 08:11:09,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715480624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:11:09,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652931746] [2023-08-24 08:11:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:11:09,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:11:09,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:11:09,888 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:11:09,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-08-24 08:11:10,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:11:10,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:11:10,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:11:10,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:11:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:10,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:11:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652931746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:11:10,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:11:10,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-08-24 08:11:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477563529] [2023-08-24 08:11:10,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:11:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:11:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:11:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:11:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:11:10,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:11:10,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 4233 transitions, 177592 flow. Second operand has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:10,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:11:10,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:11:10,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:11:27,395 INFO L124 PetriNetUnfolderBase]: 8429/13488 cut-off events. [2023-08-24 08:11:27,396 INFO L125 PetriNetUnfolderBase]: For 927515/927515 co-relation queries the response was YES. [2023-08-24 08:11:27,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234833 conditions, 13488 events. 8429/13488 cut-off events. For 927515/927515 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 95987 event pairs, 361 based on Foata normal form. 22/13510 useless extension candidates. Maximal degree in co-relation 234495. Up to 7730 conditions per place. [2023-08-24 08:11:27,675 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2334 selfloop transitions, 2014 changer transitions 0/4348 dead transitions. [2023-08-24 08:11:27,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 4348 transitions, 189359 flow [2023-08-24 08:11:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 08:11:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 08:11:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4459 transitions. [2023-08-24 08:11:27,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4172749391727494 [2023-08-24 08:11:27,678 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4459 transitions. [2023-08-24 08:11:27,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4459 transitions. [2023-08-24 08:11:27,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:11:27,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4459 transitions. [2023-08-24 08:11:27,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 171.5) internal successors, (4459), 26 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:27,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:27,685 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 411.0) internal successors, (11097), 27 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:27,685 INFO L175 Difference]: Start difference. First operand has 971 places, 4233 transitions, 177592 flow. Second operand 26 states and 4459 transitions. [2023-08-24 08:11:27,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 4348 transitions, 189359 flow [2023-08-24 08:11:45,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 989 places, 4348 transitions, 188323 flow, removed 42 selfloop flow, removed 6 redundant places. [2023-08-24 08:11:45,409 INFO L231 Difference]: Finished difference. Result has 993 places, 4302 transitions, 184063 flow [2023-08-24 08:11:45,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=176336, PETRI_DIFFERENCE_MINUEND_PLACES=964, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=184063, PETRI_PLACES=993, PETRI_TRANSITIONS=4302} [2023-08-24 08:11:45,412 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 973 predicate places. [2023-08-24 08:11:45,412 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 4302 transitions, 184063 flow [2023-08-24 08:11:45,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 168.76470588235293) internal successors, (2869), 17 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:45,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:11:45,413 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:11:45,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-08-24 08:11:45,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-08-24 08:11:45,618 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:11:45,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:11:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1741401153, now seen corresponding path program 87 times [2023-08-24 08:11:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:11:45,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495341696] [2023-08-24 08:11:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:11:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:11:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:11:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:11:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495341696] [2023-08-24 08:11:45,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495341696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:11:45,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937806396] [2023-08-24 08:11:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:11:45,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:11:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:11:45,681 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:11:45,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-08-24 08:11:45,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:11:45,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:11:45,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:11:45,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:11:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:45,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:11:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:11:45,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937806396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:11:45,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:11:45,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:11:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021494948] [2023-08-24 08:11:45,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:11:45,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:11:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:11:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:11:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:11:45,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:11:45,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 4302 transitions, 184063 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:11:45,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:11:45,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:11:45,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:12:04,277 INFO L124 PetriNetUnfolderBase]: 8518/13661 cut-off events. [2023-08-24 08:12:04,277 INFO L125 PetriNetUnfolderBase]: For 950542/950542 co-relation queries the response was YES. [2023-08-24 08:12:04,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241391 conditions, 13661 events. 8518/13661 cut-off events. For 950542/950542 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 97470 event pairs, 283 based on Foata normal form. 18/13679 useless extension candidates. Maximal degree in co-relation 241049. Up to 9223 conditions per place. [2023-08-24 08:12:04,564 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 3047 selfloop transitions, 1364 changer transitions 0/4411 dead transitions. [2023-08-24 08:12:04,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1013 places, 4411 transitions, 195600 flow [2023-08-24 08:12:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:12:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:12:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3599 transitions. [2023-08-24 08:12:04,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169852855984243 [2023-08-24 08:12:04,567 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3599 transitions. [2023-08-24 08:12:04,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3599 transitions. [2023-08-24 08:12:04,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:12:04,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3599 transitions. [2023-08-24 08:12:04,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 171.38095238095238) internal successors, (3599), 21 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:04,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:04,572 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 411.0) internal successors, (9042), 22 states have internal predecessors, (9042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:04,573 INFO L175 Difference]: Start difference. First operand has 993 places, 4302 transitions, 184063 flow. Second operand 21 states and 3599 transitions. [2023-08-24 08:12:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1013 places, 4411 transitions, 195600 flow [2023-08-24 08:12:23,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 4411 transitions, 192008 flow, removed 283 selfloop flow, removed 18 redundant places. [2023-08-24 08:12:23,802 INFO L231 Difference]: Finished difference. Result has 1001 places, 4363 transitions, 186280 flow [2023-08-24 08:12:23,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=180219, PETRI_DIFFERENCE_MINUEND_PLACES=975, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=186280, PETRI_PLACES=1001, PETRI_TRANSITIONS=4363} [2023-08-24 08:12:23,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 981 predicate places. [2023-08-24 08:12:23,805 INFO L495 AbstractCegarLoop]: Abstraction has has 1001 places, 4363 transitions, 186280 flow [2023-08-24 08:12:23,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:23,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:12:23,805 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:12:23,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-08-24 08:12:24,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2023-08-24 08:12:24,010 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:12:24,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:12:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 588346205, now seen corresponding path program 88 times [2023-08-24 08:12:24,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:12:24,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207803129] [2023-08-24 08:12:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:12:24,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:12:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:12:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:12:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:12:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207803129] [2023-08-24 08:12:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207803129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:12:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021599635] [2023-08-24 08:12:24,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:12:24,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:12:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:12:24,074 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:12:24,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-08-24 08:12:24,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:12:24,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:12:24,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:12:24,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:12:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:12:24,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:12:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:12:24,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021599635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:12:24,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:12:24,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:12:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801311720] [2023-08-24 08:12:24,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:12:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:12:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:12:24,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:12:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:12:24,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:12:24,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1001 places, 4363 transitions, 186280 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:24,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:12:24,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:12:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:12:42,605 INFO L124 PetriNetUnfolderBase]: 8532/13693 cut-off events. [2023-08-24 08:12:42,605 INFO L125 PetriNetUnfolderBase]: For 966430/966430 co-relation queries the response was YES. [2023-08-24 08:12:42,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241672 conditions, 13693 events. 8532/13693 cut-off events. For 966430/966430 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 97895 event pairs, 275 based on Foata normal form. 12/13705 useless extension candidates. Maximal degree in co-relation 241325. Up to 8243 conditions per place. [2023-08-24 08:12:42,902 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2727 selfloop transitions, 1697 changer transitions 0/4424 dead transitions. [2023-08-24 08:12:42,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 4424 transitions, 195897 flow [2023-08-24 08:12:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:12:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:12:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4117 transitions. [2023-08-24 08:12:42,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173763179237632 [2023-08-24 08:12:42,905 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4117 transitions. [2023-08-24 08:12:42,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4117 transitions. [2023-08-24 08:12:42,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:12:42,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4117 transitions. [2023-08-24 08:12:42,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 171.54166666666666) internal successors, (4117), 24 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:42,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:42,912 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 411.0) internal successors, (10275), 25 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:12:42,912 INFO L175 Difference]: Start difference. First operand has 1001 places, 4363 transitions, 186280 flow. Second operand 24 states and 4117 transitions. [2023-08-24 08:12:42,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 4424 transitions, 195897 flow [2023-08-24 08:13:03,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1006 places, 4424 transitions, 193858 flow, removed 232 selfloop flow, removed 16 redundant places. [2023-08-24 08:13:03,168 INFO L231 Difference]: Finished difference. Result has 1008 places, 4377 transitions, 188510 flow [2023-08-24 08:13:03,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=183985, PETRI_DIFFERENCE_MINUEND_PLACES=983, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1679, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=188510, PETRI_PLACES=1008, PETRI_TRANSITIONS=4377} [2023-08-24 08:13:03,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 988 predicate places. [2023-08-24 08:13:03,170 INFO L495 AbstractCegarLoop]: Abstraction has has 1008 places, 4377 transitions, 188510 flow [2023-08-24 08:13:03,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:13:03,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:13:03,170 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:13:03,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-08-24 08:13:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:13:03,371 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:13:03,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:13:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -263063698, now seen corresponding path program 89 times [2023-08-24 08:13:03,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:13:03,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672503817] [2023-08-24 08:13:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:13:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:13:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:13:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:13:03,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672503817] [2023-08-24 08:13:03,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672503817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:13:03,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963294685] [2023-08-24 08:13:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:13:03,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:13:03,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:13:03,431 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:13:03,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-08-24 08:13:03,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:13:03,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:13:03,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:13:03,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:13:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:03,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:13:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963294685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:13:03,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:13:03,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-08-24 08:13:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717974963] [2023-08-24 08:13:03,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:13:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:13:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:13:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:13:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:13:03,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 411 [2023-08-24 08:13:03,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1008 places, 4377 transitions, 188510 flow. Second operand has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:13:03,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:13:03,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 411 [2023-08-24 08:13:03,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:13:22,269 INFO L124 PetriNetUnfolderBase]: 8532/13689 cut-off events. [2023-08-24 08:13:22,269 INFO L125 PetriNetUnfolderBase]: For 990943/990943 co-relation queries the response was YES. [2023-08-24 08:13:22,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242945 conditions, 13689 events. 8532/13689 cut-off events. For 990943/990943 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 97818 event pairs, 1264 based on Foata normal form. 6/13695 useless extension candidates. Maximal degree in co-relation 242599. Up to 9364 conditions per place. [2023-08-24 08:13:22,562 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 2949 selfloop transitions, 1479 changer transitions 2/4430 dead transitions. [2023-08-24 08:13:22,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 4430 transitions, 198447 flow [2023-08-24 08:13:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:13:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:13:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3260 transitions. [2023-08-24 08:13:22,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41746702522730184 [2023-08-24 08:13:22,565 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3260 transitions. [2023-08-24 08:13:22,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3260 transitions. [2023-08-24 08:13:22,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:13:22,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3260 transitions. [2023-08-24 08:13:22,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 171.57894736842104) internal successors, (3260), 19 states have internal predecessors, (3260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:13:22,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:13:22,570 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 411.0) internal successors, (8220), 20 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) [2023-08-24 08:13:22,570 INFO L175 Difference]: Start difference. First operand has 1008 places, 4377 transitions, 188510 flow. Second operand 19 states and 3260 transitions. [2023-08-24 08:13:22,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 4430 transitions, 198447 flow [2023-08-24 08:13:42,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1004 places, 4430 transitions, 195436 flow, removed 108 selfloop flow, removed 21 redundant places. [2023-08-24 08:13:42,894 INFO L231 Difference]: Finished difference. Result has 1005 places, 4376 transitions, 188618 flow [2023-08-24 08:13:42,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=185445, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=188618, PETRI_PLACES=1005, PETRI_TRANSITIONS=4376} [2023-08-24 08:13:42,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 985 predicate places. [2023-08-24 08:13:42,896 INFO L495 AbstractCegarLoop]: Abstraction has has 1005 places, 4376 transitions, 188618 flow [2023-08-24 08:13:42,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 168.8) internal successors, (2532), 15 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:13:42,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:13:42,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:13:42,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2023-08-24 08:13:43,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-08-24 08:13:43,097 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:13:43,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:13:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1881778685, now seen corresponding path program 90 times [2023-08-24 08:13:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:13:43,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016194655] [2023-08-24 08:13:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:13:43,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:13:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:13:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:43,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:13:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016194655] [2023-08-24 08:13:43,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016194655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:13:43,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393489243] [2023-08-24 08:13:43,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:13:43,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:13:43,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:13:43,497 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:13:43,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-08-24 08:13:43,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:13:43,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:13:43,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 134 conjunts are in the unsatisfiable core [2023-08-24 08:13:43,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:13:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:43,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:13:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:13:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393489243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:13:44,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:13:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 08:13:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623754030] [2023-08-24 08:13:44,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:13:44,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:13:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:13:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:13:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:13:44,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 411 [2023-08-24 08:13:44,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1005 places, 4376 transitions, 188618 flow. Second operand has 22 states, 22 states have (on average 158.9090909090909) internal successors, (3496), 22 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:13:44,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:13:44,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 411 [2023-08-24 08:13:44,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 08:13:56,769 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:13:56,775 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:13:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:13:56,873 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 08:13:56,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-08-24 08:13:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-08-24 08:13:57,074 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 157/411 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 158848 conditions, 8988 events (5521/8987 cut-off events. For 740917/740919 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 69748 event pairs, 113 based on Foata normal form. 0/9965 useless extension candidates. Maximal degree in co-relation 158503. Up to 7179 conditions per place.). [2023-08-24 08:13:57,075 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 08:13:57,075 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 08:13:57,075 INFO L445 BasicCegarLoop]: Path program histogram: [90, 6, 6, 2] [2023-08-24 08:13:57,077 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:13:57,077 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:13:57,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:13:57 BasicIcfg [2023-08-24 08:13:57,079 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:13:57,080 INFO L158 Benchmark]: Toolchain (without parser) took 808477.65ms. Allocated memory was 362.8MB in the beginning and 9.6GB in the end (delta: 9.3GB). Free memory was 339.3MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.9GB. Max. memory is 16.0GB. [2023-08-24 08:13:57,080 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 339.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:13:57,080 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.16ms. Allocated memory is still 362.8MB. Free memory was 339.3MB in the beginning and 328.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 08:13:57,080 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.46ms. Allocated memory is still 362.8MB. Free memory was 328.0MB in the beginning and 325.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:13:57,080 INFO L158 Benchmark]: Boogie Preprocessor took 40.64ms. Allocated memory is still 362.8MB. Free memory was 325.9MB in the beginning and 324.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:13:57,081 INFO L158 Benchmark]: RCFGBuilder took 506.96ms. Allocated memory is still 362.8MB. Free memory was 324.4MB in the beginning and 306.6MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 08:13:57,081 INFO L158 Benchmark]: TraceAbstraction took 807706.60ms. Allocated memory was 362.8MB in the beginning and 9.6GB in the end (delta: 9.3GB). Free memory was 305.9MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.8GB. Max. memory is 16.0GB. [2023-08-24 08:13:57,082 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 339.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 188.16ms. Allocated memory is still 362.8MB. Free memory was 339.3MB in the beginning and 328.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.46ms. Allocated memory is still 362.8MB. Free memory was 328.0MB in the beginning and 325.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.64ms. Allocated memory is still 362.8MB. Free memory was 325.9MB in the beginning and 324.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 506.96ms. Allocated memory is still 362.8MB. Free memory was 324.4MB in the beginning and 306.6MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 807706.60ms. Allocated memory was 362.8MB in the beginning and 9.6GB in the end (delta: 9.3GB). Free memory was 305.9MB in the beginning and 7.6GB in the end (delta: -7.3GB). Peak memory consumption was 2.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 181 PlacesBefore, 20 PlacesAfterwards, 188 TransitionsBefore, 15 TransitionsAfterwards, 7700 CoEnabledTransitionPairs, 8 FixpointIterations, 63 TrivialSequentialCompositions, 99 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 34 ConcurrentYvCompositions, 12 ChoiceCompositions, 213 TotalNumberOfCompositions, 6419 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6419, independent: 6419, independent conditional: 0, independent unconditional: 6419, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4347, independent: 4347, independent conditional: 0, independent unconditional: 4347, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6419, independent: 2072, independent conditional: 0, independent unconditional: 2072, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 4347, unknown conditional: 0, unknown unconditional: 4347] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 157/411 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 158848 conditions, 8988 events (5521/8987 cut-off events. For 740917/740919 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 69748 event pairs, 113 based on Foata normal form. 0/9965 useless extension candidates. Maximal degree in co-relation 158503. Up to 7179 conditions per place.). - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 157/411 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 158848 conditions, 8988 events (5521/8987 cut-off events. For 740917/740919 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 69748 event pairs, 113 based on Foata normal form. 0/9965 useless extension candidates. Maximal degree in co-relation 158503. Up to 7179 conditions per place.). - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 157/411 universal loopers) in iteration 104,while PetriNetUnfolder was constructing finite prefix that currently has 158848 conditions, 8988 events (5521/8987 cut-off events. For 740917/740919 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 69748 event pairs, 113 based on Foata normal form. 0/9965 useless extension candidates. Maximal degree in co-relation 158503. Up to 7179 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 287 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: 807.6s, OverallIterations: 104, TraceHistogramMax: 3, PathProgramHistogramMax: 90, EmptinessCheckTime: 0.0s, AutomataDifference: 747.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4581 SdHoareTripleChecker+Valid, 14.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4581 mSDsluCounter, 841 SdHoareTripleChecker+Invalid, 11.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 549 mSDsCounter, 822 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29246 IncrementalHoareTripleChecker+Invalid, 30068 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 822 mSolverCounterUnsat, 292 mSDtfsCounter, 29246 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4727 GetRequests, 2460 SyntacticMatches, 352 SemanticMatches, 1915 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12589 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188618occurred in iteration=103, InterpolantAutomatonStates: 1573, 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: 1.2s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 23.5s InterpolantComputationTime, 3324 NumberOfCodeBlocks, 3324 NumberOfCodeBlocksAsserted, 316 NumberOfCheckSat, 4625 ConstructedInterpolants, 0 QuantifiedInterpolants, 25034 SizeOfPredicates, 687 NumberOfNonLiveVariables, 24359 ConjunctsInSsa, 2082 ConjunctsInUnsatCore, 292 InterpolantComputations, 10 PerfectInterpolantSequences, 606/1817 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