/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:41:01,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:41:01,866 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 02:41:01,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:41:01,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:41:01,907 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:41:01,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:41:01,908 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:41:01,909 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:41:01,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:41:01,912 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:41:01,912 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:41:01,913 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:41:01,914 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:41:01,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:41:01,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:41:01,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:41:01,915 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:41:01,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:41:01,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:41:01,915 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:41:01,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:41:01,916 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:41:01,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:41:01,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:41:01,917 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:41:01,917 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:41:01,918 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:41:01,918 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:41:01,918 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:41:01,919 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:41:01,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:41:01,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:41:01,919 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:41:01,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:41:01,920 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:41:02,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:41:02,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:41:02,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:41:02,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:41:02,265 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:41:02,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-24 02:41:03,429 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:41:03,657 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:41:03,657 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c [2023-08-24 02:41:03,667 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02e41c34/b1afab94c846426e847d4c5cc8b241eb/FLAG6305e8a4f [2023-08-24 02:41:03,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f02e41c34/b1afab94c846426e847d4c5cc8b241eb [2023-08-24 02:41:03,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:41:03,687 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:41:03,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:41:03,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:41:03,690 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:41:03,690 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:03,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe4cf96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03, skipping insertion in model container [2023-08-24 02:41:03,691 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:03,715 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:41:03,895 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-24 02:41:03,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:41:03,918 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:41:03,953 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum2.wvr.c[2599,2612] [2023-08-24 02:41:03,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:41:03,969 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:41:03,969 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:41:03,975 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:41:03,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03 WrapperNode [2023-08-24 02:41:03,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:41:03,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:41:03,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:41:03,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:41:03,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:03,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,029 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 280 [2023-08-24 02:41:04,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:41:04,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:41:04,030 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:41:04,030 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:41:04,037 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,053 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,055 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,056 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:41:04,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:41:04,068 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:41:04,068 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:41:04,069 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (1/1) ... [2023-08-24 02:41:04,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:41:04,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:04,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 02:41:04,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 02:41:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:41:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:41:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:41:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:41:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:41:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:41:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:41:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:41:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 02:41:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 02:41:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:41:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:41:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:41:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 02:41:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:41:04,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:41:04,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:41:04,153 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 02:41:04,273 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:41:04,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:41:04,662 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:41:04,918 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:41:04,918 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 02:41:04,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:41:04 BoogieIcfgContainer [2023-08-24 02:41:04,920 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:41:04,922 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:41:04,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:41:04,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:41:04,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:41:03" (1/3) ... [2023-08-24 02:41:04,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4ae754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:41:04, skipping insertion in model container [2023-08-24 02:41:04,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:41:03" (2/3) ... [2023-08-24 02:41:04,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4ae754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:41:04, skipping insertion in model container [2023-08-24 02:41:04,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:41:04" (3/3) ... [2023-08-24 02:41:04,927 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum2.wvr.c [2023-08-24 02:41:04,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:41:04,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:41:04,942 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:41:04,997 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 02:41:05,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 185 transitions, 394 flow [2023-08-24 02:41:05,091 INFO L124 PetriNetUnfolderBase]: 16/182 cut-off events. [2023-08-24 02:41:05,091 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:41:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 182 events. 16/182 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-08-24 02:41:05,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 185 transitions, 394 flow [2023-08-24 02:41:05,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 172 transitions, 362 flow [2023-08-24 02:41:05,103 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:41:05,110 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 172 transitions, 362 flow [2023-08-24 02:41:05,113 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 172 transitions, 362 flow [2023-08-24 02:41:05,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 172 transitions, 362 flow [2023-08-24 02:41:05,148 INFO L124 PetriNetUnfolderBase]: 16/172 cut-off events. [2023-08-24 02:41:05,148 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:41:05,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 16/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 120 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 145. Up to 2 conditions per place. [2023-08-24 02:41:05,151 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-24 02:41:11,571 INFO L134 LiptonReduction]: Checked pairs total: 1610 [2023-08-24 02:41:11,572 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-24 02:41:11,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:41:11,588 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;@a628124, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:41:11,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 02:41:11,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:41:11,597 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-24 02:41:11,597 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:41:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:11,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:11,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:11,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1685240423, now seen corresponding path program 1 times [2023-08-24 02:41:11,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961234976] [2023-08-24 02:41:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961234976] [2023-08-24 02:41:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961234976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:41:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:41:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:41:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93370252] [2023-08-24 02:41:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:41:12,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:41:12,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:12,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:41:12,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:41:12,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 365 [2023-08-24 02:41:12,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:12,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 365 [2023-08-24 02:41:12,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:12,629 INFO L124 PetriNetUnfolderBase]: 341/476 cut-off events. [2023-08-24 02:41:12,630 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-08-24 02:41:12,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 476 events. 341/476 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1453 event pairs, 132 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 756. Up to 366 conditions per place. [2023-08-24 02:41:12,635 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 30 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-08-24 02:41:12,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 180 flow [2023-08-24 02:41:12,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:41:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:41:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2023-08-24 02:41:12,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802739726027397 [2023-08-24 02:41:12,651 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2023-08-24 02:41:12,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2023-08-24 02:41:12,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:12,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2023-08-24 02:41:12,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,668 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,670 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 70 flow. Second operand 5 states and 694 transitions. [2023-08-24 02:41:12,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 180 flow [2023-08-24 02:41:12,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 02:41:12,675 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 106 flow [2023-08-24 02:41:12,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-08-24 02:41:12,679 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-24 02:41:12,679 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 106 flow [2023-08-24 02:41:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.8) internal successors, (674), 5 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:12,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:41:12,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:12,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1243308718, now seen corresponding path program 1 times [2023-08-24 02:41:12,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:12,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801655146] [2023-08-24 02:41:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:12,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:12,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:12,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801655146] [2023-08-24 02:41:12,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801655146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:41:12,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:41:12,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 02:41:12,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900205460] [2023-08-24 02:41:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:41:12,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 02:41:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 02:41:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 02:41:12,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 365 [2023-08-24 02:41:12,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:12,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:12,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 365 [2023-08-24 02:41:12,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:12,991 INFO L124 PetriNetUnfolderBase]: 339/475 cut-off events. [2023-08-24 02:41:12,991 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2023-08-24 02:41:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1107 conditions, 475 events. 339/475 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1450 event pairs, 177 based on Foata normal form. 3/318 useless extension candidates. Maximal degree in co-relation 1077. Up to 469 conditions per place. [2023-08-24 02:41:12,995 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 23 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-24 02:41:12,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 157 flow [2023-08-24 02:41:12,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:41:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:41:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 522 transitions. [2023-08-24 02:41:12,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35753424657534244 [2023-08-24 02:41:12,997 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 522 transitions. [2023-08-24 02:41:12,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 522 transitions. [2023-08-24 02:41:12,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:12,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 522 transitions. [2023-08-24 02:41:12,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,003 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 106 flow. Second operand 4 states and 522 transitions. [2023-08-24 02:41:13,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 157 flow [2023-08-24 02:41:13,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 02:41:13,006 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 100 flow [2023-08-24 02:41:13,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2023-08-24 02:41:13,007 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-24 02:41:13,007 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 100 flow [2023-08-24 02:41:13,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:13,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:13,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:41:13,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:13,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:13,009 INFO L85 PathProgramCache]: Analyzing trace with hash -305089118, now seen corresponding path program 1 times [2023-08-24 02:41:13,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:13,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046022641] [2023-08-24 02:41:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:13,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:41:13,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:13,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046022641] [2023-08-24 02:41:13,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046022641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:13,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778945391] [2023-08-24 02:41:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:13,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:13,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 02:41:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:13,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 02:41:13,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:41:13,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:41:13,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778945391] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:13,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 02:41:13,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 02:41:13,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866167457] [2023-08-24 02:41:13,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:41:13,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:41:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:41:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 02:41:13,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 365 [2023-08-24 02:41:13,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:13,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 365 [2023-08-24 02:41:13,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:13,526 INFO L124 PetriNetUnfolderBase]: 312/456 cut-off events. [2023-08-24 02:41:13,527 INFO L125 PetriNetUnfolderBase]: For 26/39 co-relation queries the response was YES. [2023-08-24 02:41:13,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 456 events. 312/456 cut-off events. For 26/39 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1481 event pairs, 74 based on Foata normal form. 13/328 useless extension candidates. Maximal degree in co-relation 983. Up to 352 conditions per place. [2023-08-24 02:41:13,530 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 34 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-24 02:41:13,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 204 flow [2023-08-24 02:41:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 02:41:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 02:41:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2023-08-24 02:41:13,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36767123287671233 [2023-08-24 02:41:13,533 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2023-08-24 02:41:13,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2023-08-24 02:41:13,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:13,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2023-08-24 02:41:13,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.2) internal successors, (671), 5 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,539 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 365.0) internal successors, (2190), 6 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,539 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 100 flow. Second operand 5 states and 671 transitions. [2023-08-24 02:41:13,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 204 flow [2023-08-24 02:41:13,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 191 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 02:41:13,542 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 103 flow [2023-08-24 02:41:13,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=103, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-24 02:41:13,544 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-24 02:41:13,544 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 103 flow [2023-08-24 02:41:13,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:13,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:13,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:13,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 02:41:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:13,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:13,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:13,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1306086369, now seen corresponding path program 1 times [2023-08-24 02:41:13,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:13,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935000550] [2023-08-24 02:41:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:13,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935000550] [2023-08-24 02:41:15,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935000550] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941895849] [2023-08-24 02:41:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:15,265 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:15,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 02:41:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:15,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 02:41:15,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:15,838 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:41:15,855 INFO L322 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2023-08-24 02:41:15,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 25 [2023-08-24 02:41:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:15,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:16,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:16,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-08-24 02:41:16,228 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 02:41:16,229 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-08-24 02:41:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:16,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941895849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:16,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:16,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-08-24 02:41:16,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696290269] [2023-08-24 02:41:16,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:16,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 02:41:16,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 02:41:16,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-08-24 02:41:16,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 365 [2023-08-24 02:41:16,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 103 flow. Second operand has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:16,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:16,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 365 [2023-08-24 02:41:16,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:17,899 INFO L124 PetriNetUnfolderBase]: 884/1285 cut-off events. [2023-08-24 02:41:17,899 INFO L125 PetriNetUnfolderBase]: For 463/463 co-relation queries the response was YES. [2023-08-24 02:41:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3325 conditions, 1285 events. 884/1285 cut-off events. For 463/463 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4550 event pairs, 121 based on Foata normal form. 1/1032 useless extension candidates. Maximal degree in co-relation 2211. Up to 719 conditions per place. [2023-08-24 02:41:17,906 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 101 selfloop transitions, 62 changer transitions 1/164 dead transitions. [2023-08-24 02:41:17,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 164 transitions, 819 flow [2023-08-24 02:41:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 02:41:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 02:41:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2072 transitions. [2023-08-24 02:41:17,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24681357951161406 [2023-08-24 02:41:17,912 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2072 transitions. [2023-08-24 02:41:17,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2072 transitions. [2023-08-24 02:41:17,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:17,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2072 transitions. [2023-08-24 02:41:17,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 90.08695652173913) internal successors, (2072), 23 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:17,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 365.0) internal successors, (8760), 24 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:17,928 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 365.0) internal successors, (8760), 24 states have internal predecessors, (8760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:17,928 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 103 flow. Second operand 23 states and 2072 transitions. [2023-08-24 02:41:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 164 transitions, 819 flow [2023-08-24 02:41:17,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 164 transitions, 777 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 02:41:17,932 INFO L231 Difference]: Finished difference. Result has 68 places, 89 transitions, 502 flow [2023-08-24 02:41:17,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=502, PETRI_PLACES=68, PETRI_TRANSITIONS=89} [2023-08-24 02:41:17,933 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 37 predicate places. [2023-08-24 02:41:17,933 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 89 transitions, 502 flow [2023-08-24 02:41:17,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.0) internal successors, (2550), 30 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:17,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:17,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:17,947 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 02:41:18,139 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,SelfDestructingSolverStorable3 [2023-08-24 02:41:18,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:18,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1252683873, now seen corresponding path program 2 times [2023-08-24 02:41:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:18,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837367856] [2023-08-24 02:41:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:18,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837367856] [2023-08-24 02:41:19,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837367856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052491896] [2023-08-24 02:41:19,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:41:19,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:19,214 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:19,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 02:41:19,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:41:19,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:41:19,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-24 02:41:19,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:19,861 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:41:19,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:41:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:19,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:20,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:20,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 86 [2023-08-24 02:41:20,268 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 02:41:20,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 30 [2023-08-24 02:41:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:20,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052491896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:20,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2023-08-24 02:41:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337187020] [2023-08-24 02:41:20,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:20,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 02:41:20,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 02:41:20,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2023-08-24 02:41:20,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 02:41:20,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 89 transitions, 502 flow. Second operand has 30 states, 30 states have (on average 98.06666666666666) internal successors, (2942), 30 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:20,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:20,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 02:41:20,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:23,768 INFO L124 PetriNetUnfolderBase]: 1321/1930 cut-off events. [2023-08-24 02:41:23,769 INFO L125 PetriNetUnfolderBase]: For 3697/3697 co-relation queries the response was YES. [2023-08-24 02:41:23,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7240 conditions, 1930 events. 1321/1930 cut-off events. For 3697/3697 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7626 event pairs, 49 based on Foata normal form. 2/1926 useless extension candidates. Maximal degree in co-relation 5529. Up to 1119 conditions per place. [2023-08-24 02:41:23,783 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 140 selfloop transitions, 155 changer transitions 9/304 dead transitions. [2023-08-24 02:41:23,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 304 transitions, 2088 flow [2023-08-24 02:41:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 02:41:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 02:41:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3889 transitions. [2023-08-24 02:41:23,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2803893294881038 [2023-08-24 02:41:23,794 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3889 transitions. [2023-08-24 02:41:23,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3889 transitions. [2023-08-24 02:41:23,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:23,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3889 transitions. [2023-08-24 02:41:23,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 102.34210526315789) internal successors, (3889), 38 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:23,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:23,822 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:23,822 INFO L175 Difference]: Start difference. First operand has 68 places, 89 transitions, 502 flow. Second operand 38 states and 3889 transitions. [2023-08-24 02:41:23,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 304 transitions, 2088 flow [2023-08-24 02:41:23,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 304 transitions, 2056 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-24 02:41:23,842 INFO L231 Difference]: Finished difference. Result has 113 places, 210 transitions, 1643 flow [2023-08-24 02:41:23,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=1643, PETRI_PLACES=113, PETRI_TRANSITIONS=210} [2023-08-24 02:41:23,844 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 82 predicate places. [2023-08-24 02:41:23,844 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 210 transitions, 1643 flow [2023-08-24 02:41:23,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.06666666666666) internal successors, (2942), 30 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:23,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:23,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:23,859 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 02:41:24,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:24,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:24,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2065015699, now seen corresponding path program 3 times [2023-08-24 02:41:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519966135] [2023-08-24 02:41:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:25,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519966135] [2023-08-24 02:41:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519966135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666201258] [2023-08-24 02:41:25,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:41:25,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:25,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:25,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:25,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 02:41:25,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:41:25,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:41:25,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 02:41:25,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:25,698 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:41:25,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:41:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:25,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:25,974 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:25,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 87 [2023-08-24 02:41:26,137 INFO L322 Elim1Store]: treesize reduction 57, result has 26.0 percent of original size [2023-08-24 02:41:26,137 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 29 [2023-08-24 02:41:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666201258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:26,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 28 [2023-08-24 02:41:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260169122] [2023-08-24 02:41:26,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:26,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 02:41:26,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:26,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 02:41:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2023-08-24 02:41:26,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 02:41:26,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 210 transitions, 1643 flow. Second operand has 30 states, 30 states have (on average 98.33333333333333) internal successors, (2950), 30 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:26,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:26,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 02:41:26,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:32,403 INFO L124 PetriNetUnfolderBase]: 2362/3509 cut-off events. [2023-08-24 02:41:32,403 INFO L125 PetriNetUnfolderBase]: For 10488/10488 co-relation queries the response was YES. [2023-08-24 02:41:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15683 conditions, 3509 events. 2362/3509 cut-off events. For 10488/10488 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16295 event pairs, 104 based on Foata normal form. 3/3512 useless extension candidates. Maximal degree in co-relation 15579. Up to 1665 conditions per place. [2023-08-24 02:41:32,437 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 320 selfloop transitions, 325 changer transitions 12/657 dead transitions. [2023-08-24 02:41:32,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 657 transitions, 5380 flow [2023-08-24 02:41:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-24 02:41:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-24 02:41:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6925 transitions. [2023-08-24 02:41:32,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28317317521979146 [2023-08-24 02:41:32,459 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6925 transitions. [2023-08-24 02:41:32,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6925 transitions. [2023-08-24 02:41:32,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:32,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6925 transitions. [2023-08-24 02:41:32,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 103.35820895522389) internal successors, (6925), 67 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:32,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 365.0) internal successors, (24820), 68 states have internal predecessors, (24820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:32,511 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 365.0) internal successors, (24820), 68 states have internal predecessors, (24820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:32,511 INFO L175 Difference]: Start difference. First operand has 113 places, 210 transitions, 1643 flow. Second operand 67 states and 6925 transitions. [2023-08-24 02:41:32,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 657 transitions, 5380 flow [2023-08-24 02:41:32,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 657 transitions, 4691 flow, removed 332 selfloop flow, removed 7 redundant places. [2023-08-24 02:41:32,613 INFO L231 Difference]: Finished difference. Result has 190 places, 407 transitions, 3490 flow [2023-08-24 02:41:32,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3490, PETRI_PLACES=190, PETRI_TRANSITIONS=407} [2023-08-24 02:41:32,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 159 predicate places. [2023-08-24 02:41:32,614 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 407 transitions, 3490 flow [2023-08-24 02:41:32,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.33333333333333) internal successors, (2950), 30 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:32,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:32,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:32,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 02:41:32,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:32,821 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:32,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 158646507, now seen corresponding path program 4 times [2023-08-24 02:41:32,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:32,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743376615] [2023-08-24 02:41:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:33,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:33,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743376615] [2023-08-24 02:41:33,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743376615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:33,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573103363] [2023-08-24 02:41:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:41:33,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:33,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:33,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 02:41:33,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:41:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:41:33,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 02:41:33,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:34,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:34,306 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:41:34,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 02:41:34,464 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:41:34,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:41:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:34,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:34,771 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:34,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 170 [2023-08-24 02:41:34,782 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:34,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 78 [2023-08-24 02:41:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:41:35,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:41:35,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:35,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:35,125 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:35,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 23 [2023-08-24 02:41:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:35,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573103363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:35,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:35,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2023-08-24 02:41:35,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527682963] [2023-08-24 02:41:35,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:35,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 02:41:35,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:35,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 02:41:35,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1039, Unknown=1, NotChecked=0, Total=1190 [2023-08-24 02:41:35,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 365 [2023-08-24 02:41:35,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 407 transitions, 3490 flow. Second operand has 35 states, 35 states have (on average 90.77142857142857) internal successors, (3177), 35 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:35,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:35,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 365 [2023-08-24 02:41:35,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:37,119 INFO L124 PetriNetUnfolderBase]: 2544/3835 cut-off events. [2023-08-24 02:41:37,119 INFO L125 PetriNetUnfolderBase]: For 16630/16630 co-relation queries the response was YES. [2023-08-24 02:41:37,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19216 conditions, 3835 events. 2544/3835 cut-off events. For 16630/16630 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18446 event pairs, 383 based on Foata normal form. 1/3830 useless extension candidates. Maximal degree in co-relation 19099. Up to 3210 conditions per place. [2023-08-24 02:41:37,153 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 350 selfloop transitions, 173 changer transitions 6/529 dead transitions. [2023-08-24 02:41:37,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 529 transitions, 5590 flow [2023-08-24 02:41:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 02:41:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 02:41:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1528 transitions. [2023-08-24 02:41:37,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26164383561643834 [2023-08-24 02:41:37,157 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1528 transitions. [2023-08-24 02:41:37,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1528 transitions. [2023-08-24 02:41:37,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:37,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1528 transitions. [2023-08-24 02:41:37,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 95.5) internal successors, (1528), 16 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:37,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 365.0) internal successors, (6205), 17 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:37,166 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 365.0) internal successors, (6205), 17 states have internal predecessors, (6205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:37,166 INFO L175 Difference]: Start difference. First operand has 190 places, 407 transitions, 3490 flow. Second operand 16 states and 1528 transitions. [2023-08-24 02:41:37,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 529 transitions, 5590 flow [2023-08-24 02:41:37,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 529 transitions, 5037 flow, removed 223 selfloop flow, removed 14 redundant places. [2023-08-24 02:41:37,260 INFO L231 Difference]: Finished difference. Result has 196 places, 482 transitions, 4189 flow [2023-08-24 02:41:37,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4189, PETRI_PLACES=196, PETRI_TRANSITIONS=482} [2023-08-24 02:41:37,261 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 165 predicate places. [2023-08-24 02:41:37,261 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 482 transitions, 4189 flow [2023-08-24 02:41:37,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.77142857142857) internal successors, (3177), 35 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:37,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:37,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:37,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 02:41:37,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:37,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:37,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1520683317, now seen corresponding path program 5 times [2023-08-24 02:41:37,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:37,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555581144] [2023-08-24 02:41:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:37,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:38,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555581144] [2023-08-24 02:41:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555581144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522052206] [2023-08-24 02:41:38,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:41:38,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:38,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:38,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:38,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 02:41:38,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:41:38,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:41:38,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 02:41:38,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:39,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:39,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:39,220 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:41:39,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 02:41:39,346 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:41:39,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:41:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:39,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:39,662 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_358 (Array Int Int)) (~M~0 Int)) (or (<= c_~res1~0 (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_358)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((v_ArrVal_358 (Array Int Int)) (~M~0 Int)) (or (< (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_358)) (.cse3 (* ~M~0 4))) (+ (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)) c_~res2~0 (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 02:41:39,778 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:39,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 166 [2023-08-24 02:41:39,792 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:39,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 74 [2023-08-24 02:41:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:41:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:41:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:40,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:40,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:40,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 25 [2023-08-24 02:41:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-24 02:41:40,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522052206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:40,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:40,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 10] total 30 [2023-08-24 02:41:40,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057787420] [2023-08-24 02:41:40,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:40,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:41:40,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:41:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=818, Unknown=1, NotChecked=58, Total=992 [2023-08-24 02:41:40,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 02:41:40,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 482 transitions, 4189 flow. Second operand has 32 states, 32 states have (on average 86.9375) internal successors, (2782), 32 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:40,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:40,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 02:41:40,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:50,547 INFO L124 PetriNetUnfolderBase]: 4580/6877 cut-off events. [2023-08-24 02:41:50,547 INFO L125 PetriNetUnfolderBase]: For 34892/34892 co-relation queries the response was YES. [2023-08-24 02:41:50,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34945 conditions, 6877 events. 4580/6877 cut-off events. For 34892/34892 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37240 event pairs, 520 based on Foata normal form. 1/6778 useless extension candidates. Maximal degree in co-relation 34824. Up to 3443 conditions per place. [2023-08-24 02:41:50,610 INFO L140 encePairwiseOnDemand]: 345/365 looper letters, 537 selfloop transitions, 404 changer transitions 1/942 dead transitions. [2023-08-24 02:41:50,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 942 transitions, 9842 flow [2023-08-24 02:41:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:41:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:41:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3394 transitions. [2023-08-24 02:41:50,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25829528158295284 [2023-08-24 02:41:50,617 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3394 transitions. [2023-08-24 02:41:50,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3394 transitions. [2023-08-24 02:41:50,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:50,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3394 transitions. [2023-08-24 02:41:50,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 94.27777777777777) internal successors, (3394), 36 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:50,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:50,635 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 365.0) internal successors, (13505), 37 states have internal predecessors, (13505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:50,635 INFO L175 Difference]: Start difference. First operand has 196 places, 482 transitions, 4189 flow. Second operand 36 states and 3394 transitions. [2023-08-24 02:41:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 942 transitions, 9842 flow [2023-08-24 02:41:50,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 942 transitions, 9676 flow, removed 49 selfloop flow, removed 5 redundant places. [2023-08-24 02:41:50,824 INFO L231 Difference]: Finished difference. Result has 241 places, 734 transitions, 7795 flow [2023-08-24 02:41:50,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=7795, PETRI_PLACES=241, PETRI_TRANSITIONS=734} [2023-08-24 02:41:50,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 210 predicate places. [2023-08-24 02:41:50,825 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 734 transitions, 7795 flow [2023-08-24 02:41:50,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 86.9375) internal successors, (2782), 32 states have internal predecessors, (2782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:50,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:50,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 02:41:51,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:51,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:51,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash -541688475, now seen corresponding path program 6 times [2023-08-24 02:41:51,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:51,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649308849] [2023-08-24 02:41:51,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:51,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:52,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649308849] [2023-08-24 02:41:52,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649308849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:52,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597726593] [2023-08-24 02:41:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:41:52,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:52,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:52,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:52,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 02:41:52,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:41:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:41:52,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 02:41:52,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:52,671 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:52,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2023-08-24 02:41:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:52,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:52,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:52,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 02:41:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:53,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597726593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:41:53,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:41:53,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2023-08-24 02:41:53,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063984486] [2023-08-24 02:41:53,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:41:53,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 02:41:53,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:41:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 02:41:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-08-24 02:41:53,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 02:41:53,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 734 transitions, 7795 flow. Second operand has 28 states, 28 states have (on average 87.10714285714286) internal successors, (2439), 28 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:53,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:41:53,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 02:41:53,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:41:55,210 INFO L124 PetriNetUnfolderBase]: 4742/7120 cut-off events. [2023-08-24 02:41:55,210 INFO L125 PetriNetUnfolderBase]: For 58057/58057 co-relation queries the response was YES. [2023-08-24 02:41:55,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45174 conditions, 7120 events. 4742/7120 cut-off events. For 58057/58057 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 38770 event pairs, 1040 based on Foata normal form. 1/7081 useless extension candidates. Maximal degree in co-relation 45023. Up to 6356 conditions per place. [2023-08-24 02:41:55,285 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 641 selfloop transitions, 178 changer transitions 3/822 dead transitions. [2023-08-24 02:41:55,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 822 transitions, 10260 flow [2023-08-24 02:41:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 02:41:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 02:41:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1928 transitions. [2023-08-24 02:41:55,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25153294194390086 [2023-08-24 02:41:55,288 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1928 transitions. [2023-08-24 02:41:55,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1928 transitions. [2023-08-24 02:41:55,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:41:55,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1928 transitions. [2023-08-24 02:41:55,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.80952380952381) internal successors, (1928), 21 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:55,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 365.0) internal successors, (8030), 22 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:55,297 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 365.0) internal successors, (8030), 22 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:55,297 INFO L175 Difference]: Start difference. First operand has 241 places, 734 transitions, 7795 flow. Second operand 21 states and 1928 transitions. [2023-08-24 02:41:55,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 822 transitions, 10260 flow [2023-08-24 02:41:55,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 822 transitions, 9776 flow, removed 180 selfloop flow, removed 14 redundant places. [2023-08-24 02:41:55,682 INFO L231 Difference]: Finished difference. Result has 252 places, 761 transitions, 8017 flow [2023-08-24 02:41:55,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7311, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8017, PETRI_PLACES=252, PETRI_TRANSITIONS=761} [2023-08-24 02:41:55,684 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2023-08-24 02:41:55,684 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 761 transitions, 8017 flow [2023-08-24 02:41:55,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 87.10714285714286) internal successors, (2439), 28 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:41:55,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:41:55,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:41:55,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 02:41:55,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:55,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:41:55,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:41:55,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1678646093, now seen corresponding path program 7 times [2023-08-24 02:41:55,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:41:55,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160164036] [2023-08-24 02:41:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:41:55,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:41:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:41:56,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:41:56,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160164036] [2023-08-24 02:41:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160164036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:41:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124568932] [2023-08-24 02:41:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:41:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:41:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:41:56,979 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:41:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 02:41:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:41:57,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 77 conjunts are in the unsatisfiable core [2023-08-24 02:41:57,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:41:57,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:41:57,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:41:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:57,679 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:41:57,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 02:41:57,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:57,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:41:57,784 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:41:57,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2023-08-24 02:41:57,951 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:41:57,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:41:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:41:58,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:41:58,365 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int))) (or (< (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ c_~res2~0 (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse3 (* ~M~0 4))) (+ c_~res2~0 (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3))))) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 02:41:58,424 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (<= c_~res1~0 (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) c_~res2~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (< (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse3 (* ~M~0 4))) (+ (select (select .cse2 c_~B~0.base) (+ .cse3 c_~B~0.offset)) c_~res2~0 (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 02:41:59,043 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse3 (select (select |c_#memory_int| c_~B~0.base) c_~B~0.offset))) (and (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (< (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~B~0.base) (+ .cse1 c_~B~0.offset)) c_~res2~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)))) (+ .cse2 .cse3 c_~res1~0 1)) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (<= (+ .cse2 .cse3 c_~res1~0) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse5 (* ~M~0 4))) (+ (select (select .cse4 c_~B~0.base) (+ .cse5 c_~B~0.offset)) c_~res2~0 (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5))))) (< (+ ~M~0 1) c_~N~0))))) is different from false [2023-08-24 02:41:59,095 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_465 (Array Int Int)) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_465))) (< (let ((.cse0 (store (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse1 (* ~M~0 4))) (+ (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~res2~0)) (+ c_~res1~0 (select (select .cse2 c_~A~0.base) c_~A~0.offset) 1 (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (< (+ ~M~0 1) c_~N~0))) (forall ((~M~0 Int) (v_ArrVal_465 (Array Int Int)) (v_ArrVal_467 (Array Int Int)) (v_ArrVal_466 (Array Int Int))) (or (<= c_~N~0 ~M~0) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_465))) (<= (+ c_~res1~0 (select (select .cse3 c_~A~0.base) c_~A~0.offset) (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (let ((.cse4 (store (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_466) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_467)) (.cse5 (* ~M~0 4))) (+ (select (select .cse4 c_~A~0.base) (+ c_~A~0.offset .cse5)) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) c_~res2~0)))) (< (+ ~M~0 1) c_~N~0)))) is different from false [2023-08-24 02:41:59,111 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:59,111 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 70 [2023-08-24 02:41:59,188 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:59,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38390 treesize of output 32314 [2023-08-24 02:41:59,361 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:59,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2006 treesize of output 1630 [2023-08-24 02:41:59,448 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:59,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1622 treesize of output 1454 [2023-08-24 02:41:59,500 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:41:59,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1398 treesize of output 1214 [2023-08-24 02:43:19,581 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:43:19,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 71 [2023-08-24 02:43:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:19,589 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:19,628 INFO L322 Elim1Store]: treesize reduction 49, result has 29.0 percent of original size [2023-08-24 02:43:19,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 630 treesize of output 457 [2023-08-24 02:43:19,675 INFO L322 Elim1Store]: treesize reduction 40, result has 29.8 percent of original size [2023-08-24 02:43:19,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 77 [2023-08-24 02:43:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-24 02:43:19,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124568932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:19,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:19,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 30 [2023-08-24 02:43:19,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474886138] [2023-08-24 02:43:19,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:19,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:43:19,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:19,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:43:19,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=641, Unknown=10, NotChecked=220, Total=992 [2023-08-24 02:43:19,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 365 [2023-08-24 02:43:19,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 761 transitions, 8017 flow. Second operand has 32 states, 32 states have (on average 90.84375) internal successors, (2907), 32 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:19,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:19,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 365 [2023-08-24 02:43:19,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:22,143 INFO L124 PetriNetUnfolderBase]: 5046/7647 cut-off events. [2023-08-24 02:43:22,143 INFO L125 PetriNetUnfolderBase]: For 59238/59397 co-relation queries the response was YES. [2023-08-24 02:43:22,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47732 conditions, 7647 events. 5046/7647 cut-off events. For 59238/59397 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43629 event pairs, 900 based on Foata normal form. 38/7537 useless extension candidates. Maximal degree in co-relation 47367. Up to 5858 conditions per place. [2023-08-24 02:43:22,215 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 621 selfloop transitions, 202 changer transitions 3/857 dead transitions. [2023-08-24 02:43:22,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 857 transitions, 10585 flow [2023-08-24 02:43:22,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:43:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:43:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1073 transitions. [2023-08-24 02:43:22,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2672478206724782 [2023-08-24 02:43:22,218 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1073 transitions. [2023-08-24 02:43:22,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1073 transitions. [2023-08-24 02:43:22,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:22,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1073 transitions. [2023-08-24 02:43:22,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 97.54545454545455) internal successors, (1073), 11 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:22,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:22,222 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:22,222 INFO L175 Difference]: Start difference. First operand has 252 places, 761 transitions, 8017 flow. Second operand 11 states and 1073 transitions. [2023-08-24 02:43:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 857 transitions, 10585 flow [2023-08-24 02:43:22,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 857 transitions, 10457 flow, removed 37 selfloop flow, removed 7 redundant places. [2023-08-24 02:43:22,567 INFO L231 Difference]: Finished difference. Result has 258 places, 799 transitions, 8978 flow [2023-08-24 02:43:22,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8978, PETRI_PLACES=258, PETRI_TRANSITIONS=799} [2023-08-24 02:43:22,568 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 227 predicate places. [2023-08-24 02:43:22,568 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 799 transitions, 8978 flow [2023-08-24 02:43:22,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 90.84375) internal successors, (2907), 32 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:22,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:22,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:22,581 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 02:43:22,774 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,SelfDestructingSolverStorable9 [2023-08-24 02:43:22,774 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:22,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash 57363835, now seen corresponding path program 8 times [2023-08-24 02:43:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:22,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410039813] [2023-08-24 02:43:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:43:24,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410039813] [2023-08-24 02:43:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410039813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305288998] [2023-08-24 02:43:24,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:43:24,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:24,209 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 02:43:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:43:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:24,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 02:43:24,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:24,770 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:24,783 INFO L322 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-24 02:43:24,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2023-08-24 02:43:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:24,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:24,985 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:43:24,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 02:43:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305288998] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:25,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:25,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 9] total 30 [2023-08-24 02:43:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716355006] [2023-08-24 02:43:25,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:25,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:43:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:43:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-08-24 02:43:25,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 02:43:25,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 799 transitions, 8978 flow. Second operand has 32 states, 32 states have (on average 83.8125) internal successors, (2682), 32 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:25,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:25,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 02:43:25,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:28,080 INFO L124 PetriNetUnfolderBase]: 5543/8367 cut-off events. [2023-08-24 02:43:28,081 INFO L125 PetriNetUnfolderBase]: For 72140/72140 co-relation queries the response was YES. [2023-08-24 02:43:28,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54560 conditions, 8367 events. 5543/8367 cut-off events. For 72140/72140 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47275 event pairs, 1234 based on Foata normal form. 1/8328 useless extension candidates. Maximal degree in co-relation 54190. Up to 7702 conditions per place. [2023-08-24 02:43:28,275 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 683 selfloop transitions, 259 changer transitions 6/948 dead transitions. [2023-08-24 02:43:28,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 948 transitions, 12432 flow [2023-08-24 02:43:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:43:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:43:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1582 transitions. [2023-08-24 02:43:28,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24079147640791476 [2023-08-24 02:43:28,278 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1582 transitions. [2023-08-24 02:43:28,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1582 transitions. [2023-08-24 02:43:28,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:28,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1582 transitions. [2023-08-24 02:43:28,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.88888888888889) internal successors, (1582), 18 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:28,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:28,286 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:28,286 INFO L175 Difference]: Start difference. First operand has 258 places, 799 transitions, 8978 flow. Second operand 18 states and 1582 transitions. [2023-08-24 02:43:28,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 948 transitions, 12432 flow [2023-08-24 02:43:28,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 948 transitions, 12350 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-24 02:43:28,663 INFO L231 Difference]: Finished difference. Result has 276 places, 905 transitions, 10921 flow [2023-08-24 02:43:28,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=8896, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10921, PETRI_PLACES=276, PETRI_TRANSITIONS=905} [2023-08-24 02:43:28,664 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 245 predicate places. [2023-08-24 02:43:28,664 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 905 transitions, 10921 flow [2023-08-24 02:43:28,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 83.8125) internal successors, (2682), 32 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:28,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:28,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:28,669 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 02:43:28,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:28,866 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:28,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1913852367, now seen corresponding path program 9 times [2023-08-24 02:43:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:28,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810737347] [2023-08-24 02:43:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:28,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:30,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:43:30,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810737347] [2023-08-24 02:43:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810737347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559315460] [2023-08-24 02:43:30,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:43:30,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:30,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:30,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:30,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 02:43:30,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:43:30,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:30,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-24 02:43:30,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:30,631 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 02:43:30,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 43 [2023-08-24 02:43:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:30,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:30,857 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:43:30,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 02:43:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559315460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:31,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:31,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 27 [2023-08-24 02:43:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906133870] [2023-08-24 02:43:31,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:31,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 02:43:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:31,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 02:43:31,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-24 02:43:31,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 02:43:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 905 transitions, 10921 flow. Second operand has 29 states, 29 states have (on average 87.10344827586206) internal successors, (2526), 29 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 02:43:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:35,267 INFO L124 PetriNetUnfolderBase]: 4886/7448 cut-off events. [2023-08-24 02:43:35,267 INFO L125 PetriNetUnfolderBase]: For 86633/86633 co-relation queries the response was YES. [2023-08-24 02:43:35,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54174 conditions, 7448 events. 4886/7448 cut-off events. For 86633/86633 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42030 event pairs, 1082 based on Foata normal form. 18/7466 useless extension candidates. Maximal degree in co-relation 54090. Up to 5760 conditions per place. [2023-08-24 02:43:35,346 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 453 selfloop transitions, 407 changer transitions 9/869 dead transitions. [2023-08-24 02:43:35,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 869 transitions, 13044 flow [2023-08-24 02:43:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 02:43:35,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 02:43:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3112 transitions. [2023-08-24 02:43:35,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2507655116841257 [2023-08-24 02:43:35,351 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3112 transitions. [2023-08-24 02:43:35,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3112 transitions. [2023-08-24 02:43:35,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:35,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3112 transitions. [2023-08-24 02:43:35,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 91.52941176470588) internal successors, (3112), 34 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:35,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 365.0) internal successors, (12775), 35 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:35,366 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 365.0) internal successors, (12775), 35 states have internal predecessors, (12775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:35,366 INFO L175 Difference]: Start difference. First operand has 276 places, 905 transitions, 10921 flow. Second operand 34 states and 3112 transitions. [2023-08-24 02:43:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 869 transitions, 13044 flow [2023-08-24 02:43:35,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 869 transitions, 12446 flow, removed 226 selfloop flow, removed 19 redundant places. [2023-08-24 02:43:35,855 INFO L231 Difference]: Finished difference. Result has 252 places, 755 transitions, 10897 flow [2023-08-24 02:43:35,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=8722, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10897, PETRI_PLACES=252, PETRI_TRANSITIONS=755} [2023-08-24 02:43:35,856 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 221 predicate places. [2023-08-24 02:43:35,856 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 755 transitions, 10897 flow [2023-08-24 02:43:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 87.10344827586206) internal successors, (2526), 29 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:35,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:35,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:35,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:36,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 02:43:36,057 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:36,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2085384497, now seen corresponding path program 10 times [2023-08-24 02:43:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:36,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079455532] [2023-08-24 02:43:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:43:37,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079455532] [2023-08-24 02:43:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079455532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493202725] [2023-08-24 02:43:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:43:37,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:37,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:37,226 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:37,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 02:43:37,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:43:37,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:37,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 02:43:37,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:43:37,681 INFO L322 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-08-24 02:43:37,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2023-08-24 02:43:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:37,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:37,856 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:43:37,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 78 [2023-08-24 02:43:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:38,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493202725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:38,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:38,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 29 [2023-08-24 02:43:38,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229370957] [2023-08-24 02:43:38,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:38,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 02:43:38,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 02:43:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-08-24 02:43:38,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 365 [2023-08-24 02:43:38,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 755 transitions, 10897 flow. Second operand has 31 states, 31 states have (on average 84.93548387096774) internal successors, (2633), 31 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:38,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:38,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 365 [2023-08-24 02:43:38,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:40,856 INFO L124 PetriNetUnfolderBase]: 5146/7906 cut-off events. [2023-08-24 02:43:40,856 INFO L125 PetriNetUnfolderBase]: For 77606/77606 co-relation queries the response was YES. [2023-08-24 02:43:40,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57224 conditions, 7906 events. 5146/7906 cut-off events. For 77606/77606 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 45716 event pairs, 1229 based on Foata normal form. 2/7908 useless extension candidates. Maximal degree in co-relation 57145. Up to 7117 conditions per place. [2023-08-24 02:43:40,920 INFO L140 encePairwiseOnDemand]: 350/365 looper letters, 650 selfloop transitions, 287 changer transitions 3/940 dead transitions. [2023-08-24 02:43:40,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 940 transitions, 15452 flow [2023-08-24 02:43:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:43:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:43:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2396 transitions. [2023-08-24 02:43:40,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24312531709791985 [2023-08-24 02:43:40,924 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2396 transitions. [2023-08-24 02:43:40,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2396 transitions. [2023-08-24 02:43:40,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:40,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2396 transitions. [2023-08-24 02:43:40,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.74074074074075) internal successors, (2396), 27 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:40,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:40,934 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:40,935 INFO L175 Difference]: Start difference. First operand has 252 places, 755 transitions, 10897 flow. Second operand 27 states and 2396 transitions. [2023-08-24 02:43:40,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 940 transitions, 15452 flow [2023-08-24 02:43:41,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 940 transitions, 14808 flow, removed 175 selfloop flow, removed 20 redundant places. [2023-08-24 02:43:41,347 INFO L231 Difference]: Finished difference. Result has 266 places, 875 transitions, 13229 flow [2023-08-24 02:43:41,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=10379, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=13229, PETRI_PLACES=266, PETRI_TRANSITIONS=875} [2023-08-24 02:43:41,348 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2023-08-24 02:43:41,348 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 875 transitions, 13229 flow [2023-08-24 02:43:41,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.93548387096774) internal successors, (2633), 31 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:41,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:41,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:41,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-24 02:43:41,549 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,SelfDestructingSolverStorable12 [2023-08-24 02:43:41,550 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:41,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:41,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1924477852, now seen corresponding path program 11 times [2023-08-24 02:43:41,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:41,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705205615] [2023-08-24 02:43:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:41,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:41,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705205615] [2023-08-24 02:43:41,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705205615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:41,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223375910] [2023-08-24 02:43:41,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:43:41,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:41,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:41,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:41,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 02:43:41,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:43:41,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:41,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:43:41,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:41,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:41,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223375910] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:41,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:41,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 02:43:41,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021684133] [2023-08-24 02:43:41,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:41,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 02:43:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 02:43:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 02:43:41,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 365 [2023-08-24 02:43:41,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 875 transitions, 13229 flow. Second operand has 14 states, 14 states have (on average 129.64285714285714) internal successors, (1815), 14 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:41,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:41,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 365 [2023-08-24 02:43:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:43,802 INFO L124 PetriNetUnfolderBase]: 4262/6981 cut-off events. [2023-08-24 02:43:43,802 INFO L125 PetriNetUnfolderBase]: For 89263/90246 co-relation queries the response was YES. [2023-08-24 02:43:43,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50697 conditions, 6981 events. 4262/6981 cut-off events. For 89263/90246 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46053 event pairs, 839 based on Foata normal form. 792/7522 useless extension candidates. Maximal degree in co-relation 50610. Up to 3212 conditions per place. [2023-08-24 02:43:43,861 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 702 selfloop transitions, 107 changer transitions 43/940 dead transitions. [2023-08-24 02:43:43,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 940 transitions, 15040 flow [2023-08-24 02:43:43,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:43:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:43:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1214 transitions. [2023-08-24 02:43:43,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369558599695586 [2023-08-24 02:43:43,863 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1214 transitions. [2023-08-24 02:43:43,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1214 transitions. [2023-08-24 02:43:43,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:43,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1214 transitions. [2023-08-24 02:43:43,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 134.88888888888889) internal successors, (1214), 9 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 02:43:43,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 365.0) internal successors, (3650), 10 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:43,866 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 365.0) internal successors, (3650), 10 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:43,866 INFO L175 Difference]: Start difference. First operand has 266 places, 875 transitions, 13229 flow. Second operand 9 states and 1214 transitions. [2023-08-24 02:43:43,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 940 transitions, 15040 flow [2023-08-24 02:43:44,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 940 transitions, 14666 flow, removed 92 selfloop flow, removed 15 redundant places. [2023-08-24 02:43:44,223 INFO L231 Difference]: Finished difference. Result has 262 places, 707 transitions, 10741 flow [2023-08-24 02:43:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=10701, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10741, PETRI_PLACES=262, PETRI_TRANSITIONS=707} [2023-08-24 02:43:44,224 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 231 predicate places. [2023-08-24 02:43:44,224 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 707 transitions, 10741 flow [2023-08-24 02:43:44,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 129.64285714285714) internal successors, (1815), 14 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:44,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:44,225 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:44,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:44,429 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,SelfDestructingSolverStorable13 [2023-08-24 02:43:44,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:44,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1796478652, now seen corresponding path program 12 times [2023-08-24 02:43:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:44,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507360502] [2023-08-24 02:43:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:44,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:44,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:44,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507360502] [2023-08-24 02:43:44,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507360502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:44,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409856028] [2023-08-24 02:43:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:43:44,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:44,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:44,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:44,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 02:43:44,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:43:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:44,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 02:43:44,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:45,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:45,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409856028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:45,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:45,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 02:43:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742849004] [2023-08-24 02:43:45,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:43:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:43:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:43:45,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 365 [2023-08-24 02:43:45,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 707 transitions, 10741 flow. Second operand has 17 states, 17 states have (on average 126.0) internal successors, (2142), 17 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:45,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:45,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 365 [2023-08-24 02:43:45,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:46,616 INFO L124 PetriNetUnfolderBase]: 4052/6712 cut-off events. [2023-08-24 02:43:46,616 INFO L125 PetriNetUnfolderBase]: For 86787/87071 co-relation queries the response was YES. [2023-08-24 02:43:46,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50531 conditions, 6712 events. 4052/6712 cut-off events. For 86787/87071 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 44330 event pairs, 945 based on Foata normal form. 420/7003 useless extension candidates. Maximal degree in co-relation 50448. Up to 2864 conditions per place. [2023-08-24 02:43:46,680 INFO L140 encePairwiseOnDemand]: 357/365 looper letters, 362 selfloop transitions, 118 changer transitions 200/734 dead transitions. [2023-08-24 02:43:46,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 734 transitions, 12335 flow [2023-08-24 02:43:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:43:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:43:46,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1303 transitions. [2023-08-24 02:43:46,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698630136986303 [2023-08-24 02:43:46,682 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1303 transitions. [2023-08-24 02:43:46,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1303 transitions. [2023-08-24 02:43:46,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:46,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1303 transitions. [2023-08-24 02:43:46,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 130.3) internal successors, (1303), 10 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:46,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:46,687 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:46,688 INFO L175 Difference]: Start difference. First operand has 262 places, 707 transitions, 10741 flow. Second operand 10 states and 1303 transitions. [2023-08-24 02:43:46,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 734 transitions, 12335 flow [2023-08-24 02:43:47,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 734 transitions, 12219 flow, removed 45 selfloop flow, removed 7 redundant places. [2023-08-24 02:43:47,322 INFO L231 Difference]: Finished difference. Result has 265 places, 486 transitions, 7305 flow [2023-08-24 02:43:47,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=10277, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7305, PETRI_PLACES=265, PETRI_TRANSITIONS=486} [2023-08-24 02:43:47,323 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 234 predicate places. [2023-08-24 02:43:47,323 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 486 transitions, 7305 flow [2023-08-24 02:43:47,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 126.0) internal successors, (2142), 17 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:47,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:47,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:47,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:47,524 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,SelfDestructingSolverStorable14 [2023-08-24 02:43:47,524 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:47,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1825928290, now seen corresponding path program 1 times [2023-08-24 02:43:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272191080] [2023-08-24 02:43:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272191080] [2023-08-24 02:43:47,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272191080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:47,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589789816] [2023-08-24 02:43:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:47,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:47,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 02:43:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:47,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 02:43:47,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:47,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:47,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589789816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:47,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:47,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 02:43:47,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680473660] [2023-08-24 02:43:47,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:47,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 02:43:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:47,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 02:43:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 02:43:47,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:43:47,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 486 transitions, 7305 flow. Second operand has 16 states, 16 states have (on average 121.5) internal successors, (1944), 16 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:47,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:47,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:43:47,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:49,262 INFO L124 PetriNetUnfolderBase]: 3629/5875 cut-off events. [2023-08-24 02:43:49,262 INFO L125 PetriNetUnfolderBase]: For 86239/86293 co-relation queries the response was YES. [2023-08-24 02:43:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45842 conditions, 5875 events. 3629/5875 cut-off events. For 86239/86293 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35622 event pairs, 976 based on Foata normal form. 82/5943 useless extension candidates. Maximal degree in co-relation 45758. Up to 2619 conditions per place. [2023-08-24 02:43:49,309 INFO L140 encePairwiseOnDemand]: 355/365 looper letters, 437 selfloop transitions, 127 changer transitions 34/621 dead transitions. [2023-08-24 02:43:49,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 621 transitions, 10501 flow [2023-08-24 02:43:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 02:43:49,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 02:43:49,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1532 transitions. [2023-08-24 02:43:49,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3497716894977169 [2023-08-24 02:43:49,311 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1532 transitions. [2023-08-24 02:43:49,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1532 transitions. [2023-08-24 02:43:49,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:49,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1532 transitions. [2023-08-24 02:43:49,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.66666666666667) internal successors, (1532), 12 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:49,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:49,317 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:49,317 INFO L175 Difference]: Start difference. First operand has 265 places, 486 transitions, 7305 flow. Second operand 12 states and 1532 transitions. [2023-08-24 02:43:49,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 621 transitions, 10501 flow [2023-08-24 02:43:49,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 621 transitions, 9898 flow, removed 247 selfloop flow, removed 19 redundant places. [2023-08-24 02:43:49,684 INFO L231 Difference]: Finished difference. Result has 256 places, 480 transitions, 7377 flow [2023-08-24 02:43:49,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7377, PETRI_PLACES=256, PETRI_TRANSITIONS=480} [2023-08-24 02:43:49,685 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 225 predicate places. [2023-08-24 02:43:49,685 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 480 transitions, 7377 flow [2023-08-24 02:43:49,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.5) internal successors, (1944), 16 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:49,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:49,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:49,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:49,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:49,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:49,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash 742224000, now seen corresponding path program 2 times [2023-08-24 02:43:49,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:49,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705653751] [2023-08-24 02:43:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:49,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:50,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:50,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705653751] [2023-08-24 02:43:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705653751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003777149] [2023-08-24 02:43:50,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:43:50,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:50,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:50,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:50,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 02:43:50,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:43:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:50,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 02:43:50,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:50,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:50,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003777149] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:50,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:50,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 02:43:50,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306925032] [2023-08-24 02:43:50,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:50,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:43:50,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:43:50,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:43:50,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:43:50,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 480 transitions, 7377 flow. Second operand has 18 states, 18 states have (on average 121.16666666666667) internal successors, (2181), 18 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:50,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:50,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:43:50,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:51,768 INFO L124 PetriNetUnfolderBase]: 3845/6231 cut-off events. [2023-08-24 02:43:51,768 INFO L125 PetriNetUnfolderBase]: For 88731/88822 co-relation queries the response was YES. [2023-08-24 02:43:51,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48786 conditions, 6231 events. 3845/6231 cut-off events. For 88731/88822 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 38812 event pairs, 958 based on Foata normal form. 260/6479 useless extension candidates. Maximal degree in co-relation 48704. Up to 2842 conditions per place. [2023-08-24 02:43:51,827 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 429 selfloop transitions, 184 changer transitions 55/691 dead transitions. [2023-08-24 02:43:51,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 691 transitions, 11833 flow [2023-08-24 02:43:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 02:43:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 02:43:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1903 transitions. [2023-08-24 02:43:51,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475799086757991 [2023-08-24 02:43:51,829 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1903 transitions. [2023-08-24 02:43:51,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1903 transitions. [2023-08-24 02:43:51,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:51,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1903 transitions. [2023-08-24 02:43:51,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.86666666666666) internal successors, (1903), 15 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:51,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 365.0) internal successors, (5840), 16 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:51,836 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 365.0) internal successors, (5840), 16 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:51,836 INFO L175 Difference]: Start difference. First operand has 256 places, 480 transitions, 7377 flow. Second operand 15 states and 1903 transitions. [2023-08-24 02:43:51,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 691 transitions, 11833 flow [2023-08-24 02:43:52,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 691 transitions, 11552 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-08-24 02:43:52,378 INFO L231 Difference]: Finished difference. Result has 268 places, 519 transitions, 8501 flow [2023-08-24 02:43:52,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=7208, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8501, PETRI_PLACES=268, PETRI_TRANSITIONS=519} [2023-08-24 02:43:52,379 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 237 predicate places. [2023-08-24 02:43:52,379 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 519 transitions, 8501 flow [2023-08-24 02:43:52,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.16666666666667) internal successors, (2181), 18 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:52,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:52,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:52,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:52,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 02:43:52,586 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:52,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:52,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1298980647, now seen corresponding path program 13 times [2023-08-24 02:43:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681942362] [2023-08-24 02:43:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:52,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681942362] [2023-08-24 02:43:52,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681942362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:52,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5417120] [2023-08-24 02:43:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:43:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:52,760 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:52,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 02:43:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:52,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:43:52,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:52,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:53,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5417120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:53,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:53,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-08-24 02:43:53,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465429385] [2023-08-24 02:43:53,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:53,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:43:53,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:43:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:43:53,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 365 [2023-08-24 02:43:53,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 519 transitions, 8501 flow. Second operand has 15 states, 15 states have (on average 133.26666666666668) internal successors, (1999), 15 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:53,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:53,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 365 [2023-08-24 02:43:53,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:54,210 INFO L124 PetriNetUnfolderBase]: 3314/5500 cut-off events. [2023-08-24 02:43:54,210 INFO L125 PetriNetUnfolderBase]: For 97176/98129 co-relation queries the response was YES. [2023-08-24 02:43:54,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43925 conditions, 5500 events. 3314/5500 cut-off events. For 97176/98129 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36216 event pairs, 1475 based on Foata normal form. 177/5369 useless extension candidates. Maximal degree in co-relation 43838. Up to 3329 conditions per place. [2023-08-24 02:43:54,262 INFO L140 encePairwiseOnDemand]: 360/365 looper letters, 418 selfloop transitions, 12 changer transitions 4/493 dead transitions. [2023-08-24 02:43:54,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 493 transitions, 8865 flow [2023-08-24 02:43:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:43:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:43:54,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1098 transitions. [2023-08-24 02:43:54,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37602739726027395 [2023-08-24 02:43:54,264 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1098 transitions. [2023-08-24 02:43:54,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1098 transitions. [2023-08-24 02:43:54,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:54,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1098 transitions. [2023-08-24 02:43:54,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 137.25) internal successors, (1098), 8 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:54,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 365.0) internal successors, (3285), 9 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:54,267 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 365.0) internal successors, (3285), 9 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:54,267 INFO L175 Difference]: Start difference. First operand has 268 places, 519 transitions, 8501 flow. Second operand 8 states and 1098 transitions. [2023-08-24 02:43:54,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 493 transitions, 8865 flow [2023-08-24 02:43:54,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 493 transitions, 8057 flow, removed 79 selfloop flow, removed 33 redundant places. [2023-08-24 02:43:54,643 INFO L231 Difference]: Finished difference. Result has 228 places, 349 transitions, 4951 flow [2023-08-24 02:43:54,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4955, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4951, PETRI_PLACES=228, PETRI_TRANSITIONS=349} [2023-08-24 02:43:54,644 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 197 predicate places. [2023-08-24 02:43:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 349 transitions, 4951 flow [2023-08-24 02:43:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 133.26666666666668) internal successors, (1999), 15 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:54,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:54,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:54,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:54,845 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,SelfDestructingSolverStorable17 [2023-08-24 02:43:54,845 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:54,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash -176080008, now seen corresponding path program 3 times [2023-08-24 02:43:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:54,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145509328] [2023-08-24 02:43:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:54,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:54,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145509328] [2023-08-24 02:43:54,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145509328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:54,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994405562] [2023-08-24 02:43:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:43:54,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:54,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:54,986 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:54,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 02:43:55,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:43:55,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:55,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 02:43:55,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:55,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:43:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994405562] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:55,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:55,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 02:43:55,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741635564] [2023-08-24 02:43:55,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:55,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 02:43:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 02:43:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-24 02:43:55,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:43:55,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 349 transitions, 4951 flow. Second operand has 17 states, 17 states have (on average 121.52941176470588) internal successors, (2066), 17 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:55,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:55,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:43:55,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:56,276 INFO L124 PetriNetUnfolderBase]: 3251/5380 cut-off events. [2023-08-24 02:43:56,277 INFO L125 PetriNetUnfolderBase]: For 71611/71693 co-relation queries the response was YES. [2023-08-24 02:43:56,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40345 conditions, 5380 events. 3251/5380 cut-off events. For 71611/71693 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33780 event pairs, 780 based on Foata normal form. 190/5553 useless extension candidates. Maximal degree in co-relation 40265. Up to 2278 conditions per place. [2023-08-24 02:43:56,321 INFO L140 encePairwiseOnDemand]: 355/365 looper letters, 283 selfloop transitions, 63 changer transitions 56/417 dead transitions. [2023-08-24 02:43:56,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 417 transitions, 6549 flow [2023-08-24 02:43:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 02:43:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 02:43:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1521 transitions. [2023-08-24 02:43:56,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34726027397260273 [2023-08-24 02:43:56,322 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1521 transitions. [2023-08-24 02:43:56,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1521 transitions. [2023-08-24 02:43:56,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:56,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1521 transitions. [2023-08-24 02:43:56,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.75) internal successors, (1521), 12 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:56,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:56,326 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 365.0) internal successors, (4745), 13 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:56,326 INFO L175 Difference]: Start difference. First operand has 228 places, 349 transitions, 4951 flow. Second operand 12 states and 1521 transitions. [2023-08-24 02:43:56,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 417 transitions, 6549 flow [2023-08-24 02:43:56,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 417 transitions, 6330 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-08-24 02:43:56,578 INFO L231 Difference]: Finished difference. Result has 225 places, 309 transitions, 4263 flow [2023-08-24 02:43:56,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4263, PETRI_PLACES=225, PETRI_TRANSITIONS=309} [2023-08-24 02:43:56,579 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 194 predicate places. [2023-08-24 02:43:56,579 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 309 transitions, 4263 flow [2023-08-24 02:43:56,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 121.52941176470588) internal successors, (2066), 17 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:56,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:56,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:56,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:56,780 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:56,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash -61414502, now seen corresponding path program 4 times [2023-08-24 02:43:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460503159] [2023-08-24 02:43:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:56,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460503159] [2023-08-24 02:43:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460503159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759833710] [2023-08-24 02:43:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:43:56,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:56,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:56,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:56,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 02:43:57,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:43:57,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:57,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 02:43:57,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:57,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:43:57,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759833710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:57,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:57,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 02:43:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400820215] [2023-08-24 02:43:57,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:57,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 02:43:57,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 02:43:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-24 02:43:57,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:43:57,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 309 transitions, 4263 flow. Second operand has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:57,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:57,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:43:57,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:43:57,855 INFO L124 PetriNetUnfolderBase]: 2003/3496 cut-off events. [2023-08-24 02:43:57,855 INFO L125 PetriNetUnfolderBase]: For 50365/50433 co-relation queries the response was YES. [2023-08-24 02:43:57,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25540 conditions, 3496 events. 2003/3496 cut-off events. For 50365/50433 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21902 event pairs, 526 based on Foata normal form. 440/3923 useless extension candidates. Maximal degree in co-relation 25466. Up to 1760 conditions per place. [2023-08-24 02:43:57,884 INFO L140 encePairwiseOnDemand]: 356/365 looper letters, 166 selfloop transitions, 6 changer transitions 123/304 dead transitions. [2023-08-24 02:43:57,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 304 transitions, 4575 flow [2023-08-24 02:43:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:43:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:43:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1259 transitions. [2023-08-24 02:43:57,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34493150684931506 [2023-08-24 02:43:57,886 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1259 transitions. [2023-08-24 02:43:57,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1259 transitions. [2023-08-24 02:43:57,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:43:57,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1259 transitions. [2023-08-24 02:43:57,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 125.9) internal successors, (1259), 10 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:57,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:57,890 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 365.0) internal successors, (4015), 11 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:57,890 INFO L175 Difference]: Start difference. First operand has 225 places, 309 transitions, 4263 flow. Second operand 10 states and 1259 transitions. [2023-08-24 02:43:57,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 304 transitions, 4575 flow [2023-08-24 02:43:58,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 304 transitions, 4324 flow, removed 35 selfloop flow, removed 16 redundant places. [2023-08-24 02:43:58,031 INFO L231 Difference]: Finished difference. Result has 204 places, 181 transitions, 2114 flow [2023-08-24 02:43:58,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2114, PETRI_PLACES=204, PETRI_TRANSITIONS=181} [2023-08-24 02:43:58,032 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 173 predicate places. [2023-08-24 02:43:58,032 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 181 transitions, 2114 flow [2023-08-24 02:43:58,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.4375) internal successors, (1943), 16 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:58,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:43:58,032 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:43:58,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 02:43:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:58,237 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:43:58,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:43:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1854123257, now seen corresponding path program 14 times [2023-08-24 02:43:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:43:58,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880641967] [2023-08-24 02:43:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:43:58,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:43:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:43:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:43:58,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:43:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880641967] [2023-08-24 02:43:58,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880641967] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:43:58,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085840500] [2023-08-24 02:43:58,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:43:58,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:43:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:43:58,356 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:43:58,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 02:43:58,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:43:58,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:43:58,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:43:58,488 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:43:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:43:58,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:43:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:43:58,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085840500] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:43:58,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:43:58,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 02:43:58,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488533495] [2023-08-24 02:43:58,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:43:58,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:43:58,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:43:58,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:43:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:43:58,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 365 [2023-08-24 02:43:58,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 181 transitions, 2114 flow. Second operand has 20 states, 20 states have (on average 117.85) internal successors, (2357), 20 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:43:58,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:43:58,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 365 [2023-08-24 02:43:58,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:00,151 INFO L124 PetriNetUnfolderBase]: 1214/1841 cut-off events. [2023-08-24 02:44:00,152 INFO L125 PetriNetUnfolderBase]: For 22755/22755 co-relation queries the response was YES. [2023-08-24 02:44:00,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14551 conditions, 1841 events. 1214/1841 cut-off events. For 22755/22755 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7774 event pairs, 137 based on Foata normal form. 192/2033 useless extension candidates. Maximal degree in co-relation 14483. Up to 1152 conditions per place. [2023-08-24 02:44:00,166 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 221 selfloop transitions, 252 changer transitions 0/473 dead transitions. [2023-08-24 02:44:00,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 473 transitions, 6573 flow [2023-08-24 02:44:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 02:44:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 02:44:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 5455 transitions. [2023-08-24 02:44:00,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33211567732115677 [2023-08-24 02:44:00,172 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 5455 transitions. [2023-08-24 02:44:00,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 5455 transitions. [2023-08-24 02:44:00,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:00,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 5455 transitions. [2023-08-24 02:44:00,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 121.22222222222223) internal successors, (5455), 45 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:00,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 365.0) internal successors, (16790), 46 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:00,187 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 365.0) internal successors, (16790), 46 states have internal predecessors, (16790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:00,187 INFO L175 Difference]: Start difference. First operand has 204 places, 181 transitions, 2114 flow. Second operand 45 states and 5455 transitions. [2023-08-24 02:44:00,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 473 transitions, 6573 flow [2023-08-24 02:44:00,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 473 transitions, 5532 flow, removed 412 selfloop flow, removed 31 redundant places. [2023-08-24 02:44:00,257 INFO L231 Difference]: Finished difference. Result has 185 places, 338 transitions, 4685 flow [2023-08-24 02:44:00,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4685, PETRI_PLACES=185, PETRI_TRANSITIONS=338} [2023-08-24 02:44:00,257 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 154 predicate places. [2023-08-24 02:44:00,257 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 338 transitions, 4685 flow [2023-08-24 02:44:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 117.85) internal successors, (2357), 20 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:00,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:00,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:00,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:00,458 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:00,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash 571360288, now seen corresponding path program 15 times [2023-08-24 02:44:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:00,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618093740] [2023-08-24 02:44:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:00,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618093740] [2023-08-24 02:44:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618093740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:00,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564115253] [2023-08-24 02:44:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:44:00,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:00,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:00,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:00,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 02:44:00,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:44:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:00,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:00,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:00,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:00,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564115253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:00,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:00,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 02:44:00,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897003635] [2023-08-24 02:44:00,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:00,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:44:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:44:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:44:00,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:00,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 338 transitions, 4685 flow. Second operand has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:00,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:00,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:00,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:01,435 INFO L124 PetriNetUnfolderBase]: 1413/2131 cut-off events. [2023-08-24 02:44:01,435 INFO L125 PetriNetUnfolderBase]: For 48671/48700 co-relation queries the response was YES. [2023-08-24 02:44:01,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19004 conditions, 2131 events. 1413/2131 cut-off events. For 48671/48700 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9266 event pairs, 241 based on Foata normal form. 39/2162 useless extension candidates. Maximal degree in co-relation 18942. Up to 1375 conditions per place. [2023-08-24 02:44:01,452 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 295 selfloop transitions, 90 changer transitions 0/408 dead transitions. [2023-08-24 02:44:01,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 408 transitions, 6763 flow [2023-08-24 02:44:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:44:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:44:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1380 transitions. [2023-08-24 02:44:01,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3437110834371108 [2023-08-24 02:44:01,454 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1380 transitions. [2023-08-24 02:44:01,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1380 transitions. [2023-08-24 02:44:01,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:01,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1380 transitions. [2023-08-24 02:44:01,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.45454545454545) internal successors, (1380), 11 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:01,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:01,457 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:01,457 INFO L175 Difference]: Start difference. First operand has 185 places, 338 transitions, 4685 flow. Second operand 11 states and 1380 transitions. [2023-08-24 02:44:01,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 408 transitions, 6763 flow [2023-08-24 02:44:01,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 408 transitions, 5085 flow, removed 712 selfloop flow, removed 12 redundant places. [2023-08-24 02:44:01,599 INFO L231 Difference]: Finished difference. Result has 181 places, 342 transitions, 3751 flow [2023-08-24 02:44:01,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3751, PETRI_PLACES=181, PETRI_TRANSITIONS=342} [2023-08-24 02:44:01,599 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 150 predicate places. [2023-08-24 02:44:01,599 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 342 transitions, 3751 flow [2023-08-24 02:44:01,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 121.11111111111111) internal successors, (2180), 18 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:01,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:01,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:01,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:01,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 02:44:01,800 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:01,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:01,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1664455464, now seen corresponding path program 16 times [2023-08-24 02:44:01,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:01,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126519938] [2023-08-24 02:44:01,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:01,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126519938] [2023-08-24 02:44:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126519938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079101171] [2023-08-24 02:44:01,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:44:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:01,953 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:01,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 02:44:02,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:44:02,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:02,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:02,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:02,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:02,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079101171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:02,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:02,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 02:44:02,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688498184] [2023-08-24 02:44:02,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:02,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:44:02,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:02,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:44:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:44:02,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:02,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 342 transitions, 3751 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:02,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:02,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:02,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:02,850 INFO L124 PetriNetUnfolderBase]: 1726/2587 cut-off events. [2023-08-24 02:44:02,851 INFO L125 PetriNetUnfolderBase]: For 44809/44842 co-relation queries the response was YES. [2023-08-24 02:44:02,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20432 conditions, 2587 events. 1726/2587 cut-off events. For 44809/44842 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11520 event pairs, 267 based on Foata normal form. 30/2480 useless extension candidates. Maximal degree in co-relation 20371. Up to 1538 conditions per place. [2023-08-24 02:44:02,870 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 268 selfloop transitions, 128 changer transitions 0/419 dead transitions. [2023-08-24 02:44:02,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 419 transitions, 5618 flow [2023-08-24 02:44:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:44:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:44:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1379 transitions. [2023-08-24 02:44:02,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3434620174346202 [2023-08-24 02:44:02,872 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1379 transitions. [2023-08-24 02:44:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1379 transitions. [2023-08-24 02:44:02,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:02,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1379 transitions. [2023-08-24 02:44:02,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:02,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:02,876 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:02,876 INFO L175 Difference]: Start difference. First operand has 181 places, 342 transitions, 3751 flow. Second operand 11 states and 1379 transitions. [2023-08-24 02:44:02,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 419 transitions, 5618 flow [2023-08-24 02:44:02,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 419 transitions, 5462 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-24 02:44:02,962 INFO L231 Difference]: Finished difference. Result has 188 places, 352 transitions, 4210 flow [2023-08-24 02:44:02,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4210, PETRI_PLACES=188, PETRI_TRANSITIONS=352} [2023-08-24 02:44:02,962 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 157 predicate places. [2023-08-24 02:44:02,962 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 352 transitions, 4210 flow [2023-08-24 02:44:02,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:02,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:02,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:02,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:03,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 02:44:03,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:03,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1487590734, now seen corresponding path program 17 times [2023-08-24 02:44:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:03,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447259037] [2023-08-24 02:44:03,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:03,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:03,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447259037] [2023-08-24 02:44:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447259037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198548213] [2023-08-24 02:44:03,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:44:03,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:03,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:03,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 02:44:03,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:44:03,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:03,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:44:03,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:03,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198548213] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:03,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2023-08-24 02:44:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836185888] [2023-08-24 02:44:03,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 02:44:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 02:44:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-24 02:44:03,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 365 [2023-08-24 02:44:03,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 352 transitions, 4210 flow. Second operand has 18 states, 18 states have (on average 117.88888888888889) internal successors, (2122), 18 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:03,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:03,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 365 [2023-08-24 02:44:03,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:04,991 INFO L124 PetriNetUnfolderBase]: 1937/2908 cut-off events. [2023-08-24 02:44:04,991 INFO L125 PetriNetUnfolderBase]: For 52361/52361 co-relation queries the response was YES. [2023-08-24 02:44:05,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23883 conditions, 2908 events. 1937/2908 cut-off events. For 52361/52361 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13274 event pairs, 231 based on Foata normal form. 14/2854 useless extension candidates. Maximal degree in co-relation 23819. Up to 1742 conditions per place. [2023-08-24 02:44:05,017 INFO L140 encePairwiseOnDemand]: 351/365 looper letters, 370 selfloop transitions, 259 changer transitions 0/629 dead transitions. [2023-08-24 02:44:05,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 629 transitions, 9296 flow [2023-08-24 02:44:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 02:44:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 02:44:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4715 transitions. [2023-08-24 02:44:05,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.331225851773797 [2023-08-24 02:44:05,021 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4715 transitions. [2023-08-24 02:44:05,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4715 transitions. [2023-08-24 02:44:05,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:05,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4715 transitions. [2023-08-24 02:44:05,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 120.8974358974359) internal successors, (4715), 39 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:05,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 365.0) internal successors, (14600), 40 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:05,037 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 365.0) internal successors, (14600), 40 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:05,037 INFO L175 Difference]: Start difference. First operand has 188 places, 352 transitions, 4210 flow. Second operand 39 states and 4715 transitions. [2023-08-24 02:44:05,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 629 transitions, 9296 flow [2023-08-24 02:44:05,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 629 transitions, 8877 flow, removed 50 selfloop flow, removed 8 redundant places. [2023-08-24 02:44:05,192 INFO L231 Difference]: Finished difference. Result has 229 places, 475 transitions, 6730 flow [2023-08-24 02:44:05,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=3962, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6730, PETRI_PLACES=229, PETRI_TRANSITIONS=475} [2023-08-24 02:44:05,193 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 198 predicate places. [2023-08-24 02:44:05,193 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 475 transitions, 6730 flow [2023-08-24 02:44:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.88888888888889) internal successors, (2122), 18 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:05,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:05,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:05,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-24 02:44:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:05,395 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:05,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash 579444672, now seen corresponding path program 18 times [2023-08-24 02:44:05,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:05,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878367011] [2023-08-24 02:44:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:44:05,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:05,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878367011] [2023-08-24 02:44:05,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878367011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:05,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712769751] [2023-08-24 02:44:05,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:44:05,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:05,557 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:05,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 02:44:05,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 02:44:05,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:05,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:05,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:44:05,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:44:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712769751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:05,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-08-24 02:44:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793860983] [2023-08-24 02:44:05,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:44:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:44:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:44:05,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:05,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 475 transitions, 6730 flow. Second operand has 21 states, 21 states have (on average 121.04761904761905) internal successors, (2542), 21 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:05,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:05,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:05,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:07,052 INFO L124 PetriNetUnfolderBase]: 2106/3149 cut-off events. [2023-08-24 02:44:07,052 INFO L125 PetriNetUnfolderBase]: For 62046/62067 co-relation queries the response was YES. [2023-08-24 02:44:07,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27197 conditions, 3149 events. 2106/3149 cut-off events. For 62046/62067 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14543 event pairs, 216 based on Foata normal form. 20/3074 useless extension candidates. Maximal degree in co-relation 27123. Up to 1949 conditions per place. [2023-08-24 02:44:07,083 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 350 selfloop transitions, 264 changer transitions 0/645 dead transitions. [2023-08-24 02:44:07,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 645 transitions, 10522 flow [2023-08-24 02:44:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 02:44:07,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 02:44:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2531 transitions. [2023-08-24 02:44:07,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34671232876712327 [2023-08-24 02:44:07,085 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2531 transitions. [2023-08-24 02:44:07,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2531 transitions. [2023-08-24 02:44:07,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:07,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2531 transitions. [2023-08-24 02:44:07,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.55) internal successors, (2531), 20 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 02:44:07,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 365.0) internal successors, (7665), 21 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:07,091 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 365.0) internal successors, (7665), 21 states have internal predecessors, (7665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:07,091 INFO L175 Difference]: Start difference. First operand has 229 places, 475 transitions, 6730 flow. Second operand 20 states and 2531 transitions. [2023-08-24 02:44:07,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 645 transitions, 10522 flow [2023-08-24 02:44:07,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 645 transitions, 9834 flow, removed 283 selfloop flow, removed 6 redundant places. [2023-08-24 02:44:07,351 INFO L231 Difference]: Finished difference. Result has 244 places, 515 transitions, 7521 flow [2023-08-24 02:44:07,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6073, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=7521, PETRI_PLACES=244, PETRI_TRANSITIONS=515} [2023-08-24 02:44:07,352 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 213 predicate places. [2023-08-24 02:44:07,352 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 515 transitions, 7521 flow [2023-08-24 02:44:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.04761904761905) internal successors, (2542), 21 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:07,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:07,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:07,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:07,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:07,558 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:07,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:07,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1545317160, now seen corresponding path program 19 times [2023-08-24 02:44:07,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:07,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095961975] [2023-08-24 02:44:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:07,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:07,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095961975] [2023-08-24 02:44:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095961975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:07,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568607715] [2023-08-24 02:44:07,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:44:07,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:07,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:07,701 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:07,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 02:44:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:07,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:07,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:07,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:08,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568607715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:08,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:08,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 02:44:08,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659028841] [2023-08-24 02:44:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:08,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:44:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:44:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:44:08,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:08,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 515 transitions, 7521 flow. Second operand has 21 states, 21 states have (on average 121.14285714285714) internal successors, (2544), 21 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:08,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:08,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:08,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:08,884 INFO L124 PetriNetUnfolderBase]: 2093/3119 cut-off events. [2023-08-24 02:44:08,885 INFO L125 PetriNetUnfolderBase]: For 64823/64847 co-relation queries the response was YES. [2023-08-24 02:44:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27463 conditions, 3119 events. 2093/3119 cut-off events. For 64823/64847 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14251 event pairs, 477 based on Foata normal form. 20/3044 useless extension candidates. Maximal degree in co-relation 27387. Up to 2286 conditions per place. [2023-08-24 02:44:08,918 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 351 selfloop transitions, 183 changer transitions 0/564 dead transitions. [2023-08-24 02:44:08,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 564 transitions, 9195 flow [2023-08-24 02:44:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:44:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:44:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1758 transitions. [2023-08-24 02:44:08,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34403131115459884 [2023-08-24 02:44:08,921 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1758 transitions. [2023-08-24 02:44:08,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1758 transitions. [2023-08-24 02:44:08,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:08,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1758 transitions. [2023-08-24 02:44:08,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 125.57142857142857) internal successors, (1758), 14 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:08,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 365.0) internal successors, (5475), 15 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:08,927 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 365.0) internal successors, (5475), 15 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:08,927 INFO L175 Difference]: Start difference. First operand has 244 places, 515 transitions, 7521 flow. Second operand 14 states and 1758 transitions. [2023-08-24 02:44:08,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 564 transitions, 9195 flow [2023-08-24 02:44:09,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 564 transitions, 8679 flow, removed 90 selfloop flow, removed 11 redundant places. [2023-08-24 02:44:09,171 INFO L231 Difference]: Finished difference. Result has 243 places, 508 transitions, 7286 flow [2023-08-24 02:44:09,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6920, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7286, PETRI_PLACES=243, PETRI_TRANSITIONS=508} [2023-08-24 02:44:09,171 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 212 predicate places. [2023-08-24 02:44:09,172 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 508 transitions, 7286 flow [2023-08-24 02:44:09,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 121.14285714285714) internal successors, (2544), 21 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:09,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:09,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:09,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:09,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 02:44:09,380 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:09,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1054203244, now seen corresponding path program 20 times [2023-08-24 02:44:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101740193] [2023-08-24 02:44:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:09,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101740193] [2023-08-24 02:44:09,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101740193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:09,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662038061] [2023-08-24 02:44:09,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:44:09,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:09,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:09,522 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:09,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 02:44:09,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:44:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:09,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:09,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:09,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:09,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662038061] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:09,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:09,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 02:44:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814817024] [2023-08-24 02:44:09,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:09,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:44:09,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:44:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:44:09,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:09,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 508 transitions, 7286 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:09,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:09,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:09,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:10,625 INFO L124 PetriNetUnfolderBase]: 2068/3071 cut-off events. [2023-08-24 02:44:10,625 INFO L125 PetriNetUnfolderBase]: For 60805/60829 co-relation queries the response was YES. [2023-08-24 02:44:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26681 conditions, 3071 events. 2068/3071 cut-off events. For 60805/60829 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13911 event pairs, 502 based on Foata normal form. 24/3022 useless extension candidates. Maximal degree in co-relation 26605. Up to 2397 conditions per place. [2023-08-24 02:44:10,664 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 362 selfloop transitions, 141 changer transitions 0/532 dead transitions. [2023-08-24 02:44:10,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 532 transitions, 8599 flow [2023-08-24 02:44:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:44:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:44:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1374 transitions. [2023-08-24 02:44:10,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3422166874221669 [2023-08-24 02:44:10,666 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1374 transitions. [2023-08-24 02:44:10,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1374 transitions. [2023-08-24 02:44:10,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:10,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1374 transitions. [2023-08-24 02:44:10,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.9090909090909) internal successors, (1374), 11 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:10,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:10,669 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:10,670 INFO L175 Difference]: Start difference. First operand has 243 places, 508 transitions, 7286 flow. Second operand 11 states and 1374 transitions. [2023-08-24 02:44:10,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 532 transitions, 8599 flow [2023-08-24 02:44:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 532 transitions, 8195 flow, removed 25 selfloop flow, removed 13 redundant places. [2023-08-24 02:44:10,874 INFO L231 Difference]: Finished difference. Result has 232 places, 496 transitions, 7000 flow [2023-08-24 02:44:10,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7000, PETRI_PLACES=232, PETRI_TRANSITIONS=496} [2023-08-24 02:44:10,875 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 201 predicate places. [2023-08-24 02:44:10,875 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 496 transitions, 7000 flow [2023-08-24 02:44:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:10,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:10,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:10,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-24 02:44:11,080 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,SelfDestructingSolverStorable26 [2023-08-24 02:44:11,081 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:11,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:11,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1204345352, now seen corresponding path program 21 times [2023-08-24 02:44:11,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087410325] [2023-08-24 02:44:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:11,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:11,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087410325] [2023-08-24 02:44:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087410325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453775350] [2023-08-24 02:44:11,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:44:11,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:11,223 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:11,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 02:44:11,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:44:11,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:11,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:11,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:11,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:11,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453775350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:11,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 02:44:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357753828] [2023-08-24 02:44:11,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:11,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 02:44:11,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 02:44:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-24 02:44:11,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:11,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 496 transitions, 7000 flow. Second operand has 21 states, 21 states have (on average 120.95238095238095) internal successors, (2540), 21 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:11,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:11,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:11,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:12,748 INFO L124 PetriNetUnfolderBase]: 2032/3006 cut-off events. [2023-08-24 02:44:12,748 INFO L125 PetriNetUnfolderBase]: For 53813/53813 co-relation queries the response was YES. [2023-08-24 02:44:12,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25754 conditions, 3006 events. 2032/3006 cut-off events. For 53813/53813 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13470 event pairs, 216 based on Foata normal form. 24/2956 useless extension candidates. Maximal degree in co-relation 25679. Up to 1760 conditions per place. [2023-08-24 02:44:12,779 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 324 selfloop transitions, 247 changer transitions 0/599 dead transitions. [2023-08-24 02:44:12,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 599 transitions, 9542 flow [2023-08-24 02:44:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 02:44:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 02:44:12,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2275 transitions. [2023-08-24 02:44:12,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462709284627093 [2023-08-24 02:44:12,782 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2275 transitions. [2023-08-24 02:44:12,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2275 transitions. [2023-08-24 02:44:12,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:12,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2275 transitions. [2023-08-24 02:44:12,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 126.38888888888889) internal successors, (2275), 18 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:12,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:12,791 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 365.0) internal successors, (6935), 19 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:12,791 INFO L175 Difference]: Start difference. First operand has 232 places, 496 transitions, 7000 flow. Second operand 18 states and 2275 transitions. [2023-08-24 02:44:12,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 599 transitions, 9542 flow [2023-08-24 02:44:13,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 599 transitions, 9224 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-08-24 02:44:13,059 INFO L231 Difference]: Finished difference. Result has 235 places, 485 transitions, 7060 flow [2023-08-24 02:44:13,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6566, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7060, PETRI_PLACES=235, PETRI_TRANSITIONS=485} [2023-08-24 02:44:13,060 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 204 predicate places. [2023-08-24 02:44:13,060 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 485 transitions, 7060 flow [2023-08-24 02:44:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 120.95238095238095) internal successors, (2540), 21 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:13,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:13,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:13,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:13,266 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,SelfDestructingSolverStorable27 [2023-08-24 02:44:13,266 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:13,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 655996130, now seen corresponding path program 22 times [2023-08-24 02:44:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989016604] [2023-08-24 02:44:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989016604] [2023-08-24 02:44:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989016604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706619279] [2023-08-24 02:44:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:44:13,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:13,434 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:13,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 02:44:13,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:44:13,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:13,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 02:44:13,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:13,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:44:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706619279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:44:13,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:44:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 02:44:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832861457] [2023-08-24 02:44:13,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:44:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 02:44:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:44:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 02:44:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-24 02:44:13,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 365 [2023-08-24 02:44:13,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 485 transitions, 7060 flow. Second operand has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:13,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:44:13,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 365 [2023-08-24 02:44:13,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:44:14,688 INFO L124 PetriNetUnfolderBase]: 2012/2969 cut-off events. [2023-08-24 02:44:14,688 INFO L125 PetriNetUnfolderBase]: For 53069/53090 co-relation queries the response was YES. [2023-08-24 02:44:14,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25693 conditions, 2969 events. 2012/2969 cut-off events. For 53069/53090 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13140 event pairs, 464 based on Foata normal form. 20/2920 useless extension candidates. Maximal degree in co-relation 25619. Up to 2194 conditions per place. [2023-08-24 02:44:14,716 INFO L140 encePairwiseOnDemand]: 354/365 looper letters, 344 selfloop transitions, 136 changer transitions 0/507 dead transitions. [2023-08-24 02:44:14,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 507 transitions, 8343 flow [2023-08-24 02:44:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 02:44:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 02:44:14,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1373 transitions. [2023-08-24 02:44:14,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34196762141967624 [2023-08-24 02:44:14,718 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1373 transitions. [2023-08-24 02:44:14,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1373 transitions. [2023-08-24 02:44:14,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:44:14,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1373 transitions. [2023-08-24 02:44:14,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.81818181818181) internal successors, (1373), 11 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:14,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:14,722 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 365.0) internal successors, (4380), 12 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:14,722 INFO L175 Difference]: Start difference. First operand has 235 places, 485 transitions, 7060 flow. Second operand 11 states and 1373 transitions. [2023-08-24 02:44:14,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 507 transitions, 8343 flow [2023-08-24 02:44:14,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 507 transitions, 7915 flow, removed 23 selfloop flow, removed 18 redundant places. [2023-08-24 02:44:14,916 INFO L231 Difference]: Finished difference. Result has 224 places, 479 transitions, 6860 flow [2023-08-24 02:44:14,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6860, PETRI_PLACES=224, PETRI_TRANSITIONS=479} [2023-08-24 02:44:14,917 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2023-08-24 02:44:14,917 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 479 transitions, 6860 flow [2023-08-24 02:44:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 121.1) internal successors, (2422), 20 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:44:14,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:44:14,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:44:14,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 02:44:15,119 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,SelfDestructingSolverStorable28 [2023-08-24 02:44:15,119 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:44:15,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:44:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 98513679, now seen corresponding path program 5 times [2023-08-24 02:44:15,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:44:15,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507970959] [2023-08-24 02:44:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:44:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:44:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:44:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:44:16,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:44:16,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507970959] [2023-08-24 02:44:16,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507970959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:44:16,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977054288] [2023-08-24 02:44:16,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:44:16,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:44:16,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:44:16,929 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:44:16,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 02:44:17,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:44:17,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:44:17,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 105 conjunts are in the unsatisfiable core [2023-08-24 02:44:17,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:44:17,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 101 [2023-08-24 02:44:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:44:17,655 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:44:17,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 02:44:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:44:17,719 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 02:44:17,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-24 02:44:17,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:44:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:44:17,956 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 02:44:17,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 02:44:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:44:17,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:44:18,278 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse0 (select .cse3 c_~B~0.base)) (.cse1 (* ~M~0 4)) (.cse2 (select .cse3 c_~A~0.base))) (+ (select .cse0 (+ .cse1 c_~B~0.offset)) (select .cse0 c_~B~0.offset) c_~res2~0 (select .cse2 (+ c_~A~0.offset .cse1)) (select .cse2 c_~A~0.offset))))) (<= c_~N~0 ~M~0) (<= ~M~0 0))) (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int))) (or (< (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse4 (select .cse7 c_~B~0.base)) (.cse5 (* ~M~0 4)) (.cse6 (select .cse7 c_~A~0.base))) (+ (select .cse4 (+ .cse5 c_~B~0.offset)) (select .cse4 c_~B~0.offset) c_~res2~0 (select .cse6 (+ c_~A~0.offset .cse5)) (select .cse6 c_~A~0.offset)))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (<= ~M~0 0)))) is different from false [2023-08-24 02:44:18,328 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (< (let ((.cse3 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse1 (select .cse3 c_~B~0.base)) (.cse0 (select .cse3 c_~A~0.base)) (.cse2 (* ~M~0 4))) (+ (select .cse0 c_~A~0.offset) (select .cse1 (+ .cse2 c_~B~0.offset)) (select .cse1 c_~B~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset .cse2))))) (+ c_~res1~0 1)) (<= c_~N~0 ~M~0) (<= ~M~0 0))) (forall ((~M~0 Int) (v_ArrVal_1596 (Array Int Int)) (v_ArrVal_1595 (Array Int Int))) (or (<= c_~res1~0 (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1595) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1596))) (let ((.cse5 (select .cse7 c_~B~0.base)) (.cse4 (select .cse7 c_~A~0.base)) (.cse6 (* ~M~0 4))) (+ (select .cse4 c_~A~0.offset) (select .cse5 (+ .cse6 c_~B~0.offset)) (select .cse5 c_~B~0.offset) c_~res2~0 (select .cse4 (+ c_~A~0.offset .cse6)))))) (<= c_~N~0 ~M~0) (<= ~M~0 0)))) is different from false [2023-08-24 02:44:20,865 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 02:44:20,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 4790 treesize of output 2542 [2023-08-24 02:44:20,908 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:44:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:44:20,935 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:44:20,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 550 treesize of output 526 [2023-08-24 02:44:20,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:44:20,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:44:20,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:44:20,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 486 treesize of output 398 [2023-08-24 02:45:01,990 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:01,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:01,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:02,114 INFO L322 Elim1Store]: treesize reduction 248, result has 24.6 percent of original size [2023-08-24 02:45:02,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 95 [2023-08-24 02:45:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:45:02,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977054288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:45:02,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:45:02,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2023-08-24 02:45:02,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592006933] [2023-08-24 02:45:02,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:45:02,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 02:45:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 02:45:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1483, Unknown=7, NotChecked=158, Total=1806 [2023-08-24 02:45:02,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 02:45:02,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 479 transitions, 6860 flow. Second operand has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:02,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:02,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 02:45:02,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:07,815 INFO L124 PetriNetUnfolderBase]: 3504/5161 cut-off events. [2023-08-24 02:45:07,816 INFO L125 PetriNetUnfolderBase]: For 90976/90976 co-relation queries the response was YES. [2023-08-24 02:45:07,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46136 conditions, 5161 events. 3504/5161 cut-off events. For 90976/90976 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 25387 event pairs, 217 based on Foata normal form. 2/5081 useless extension candidates. Maximal degree in co-relation 46064. Up to 3466 conditions per place. [2023-08-24 02:45:07,870 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 661 selfloop transitions, 377 changer transitions 1/1039 dead transitions. [2023-08-24 02:45:07,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1039 transitions, 17553 flow [2023-08-24 02:45:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 02:45:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 02:45:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3334 transitions. [2023-08-24 02:45:07,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2468715290633099 [2023-08-24 02:45:07,873 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3334 transitions. [2023-08-24 02:45:07,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3334 transitions. [2023-08-24 02:45:07,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:07,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3334 transitions. [2023-08-24 02:45:07,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.10810810810811) internal successors, (3334), 37 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:07,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 365.0) internal successors, (13870), 38 states have internal predecessors, (13870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:07,884 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 365.0) internal successors, (13870), 38 states have internal predecessors, (13870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:07,884 INFO L175 Difference]: Start difference. First operand has 224 places, 479 transitions, 6860 flow. Second operand 37 states and 3334 transitions. [2023-08-24 02:45:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1039 transitions, 17553 flow [2023-08-24 02:45:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1039 transitions, 16871 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-24 02:45:08,464 INFO L231 Difference]: Finished difference. Result has 266 places, 817 transitions, 13925 flow [2023-08-24 02:45:08,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13925, PETRI_PLACES=266, PETRI_TRANSITIONS=817} [2023-08-24 02:45:08,465 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 235 predicate places. [2023-08-24 02:45:08,465 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 817 transitions, 13925 flow [2023-08-24 02:45:08,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 83.67441860465117) internal successors, (3598), 43 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:08,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:08,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:45:08,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-24 02:45:08,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:08,670 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:45:08,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:08,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1669165277, now seen corresponding path program 6 times [2023-08-24 02:45:08,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:08,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348591413] [2023-08-24 02:45:08,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:08,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:08,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:45:09,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348591413] [2023-08-24 02:45:09,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348591413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:09,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596247476] [2023-08-24 02:45:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:45:09,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:09,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:09,761 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:09,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 02:45:09,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 02:45:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:45:09,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 02:45:09,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:45:10,457 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 02:45:10,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2023-08-24 02:45:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:10,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:45:11,139 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 02:45:11,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 326 [2023-08-24 02:45:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:45:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596247476] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:45:23,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:45:23,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 30 [2023-08-24 02:45:23,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851459318] [2023-08-24 02:45:23,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:45:23,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:45:23,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:45:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:45:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-08-24 02:45:23,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 02:45:23,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 817 transitions, 13925 flow. Second operand has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:23,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:45:23,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 02:45:23,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:45:27,078 INFO L124 PetriNetUnfolderBase]: 5391/7818 cut-off events. [2023-08-24 02:45:27,078 INFO L125 PetriNetUnfolderBase]: For 190247/190247 co-relation queries the response was YES. [2023-08-24 02:45:27,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77158 conditions, 7818 events. 5391/7818 cut-off events. For 190247/190247 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39888 event pairs, 448 based on Foata normal form. 2/7796 useless extension candidates. Maximal degree in co-relation 77070. Up to 5611 conditions per place. [2023-08-24 02:45:27,166 INFO L140 encePairwiseOnDemand]: 349/365 looper letters, 873 selfloop transitions, 578 changer transitions 1/1452 dead transitions. [2023-08-24 02:45:27,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1452 transitions, 27762 flow [2023-08-24 02:45:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 02:45:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 02:45:27,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3955 transitions. [2023-08-24 02:45:27,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28514780100937276 [2023-08-24 02:45:27,169 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3955 transitions. [2023-08-24 02:45:27,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3955 transitions. [2023-08-24 02:45:27,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:45:27,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3955 transitions. [2023-08-24 02:45:27,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 104.07894736842105) internal successors, (3955), 38 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:27,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:27,178 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 365.0) internal successors, (14235), 39 states have internal predecessors, (14235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:27,178 INFO L175 Difference]: Start difference. First operand has 266 places, 817 transitions, 13925 flow. Second operand 38 states and 3955 transitions. [2023-08-24 02:45:27,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1452 transitions, 27762 flow [2023-08-24 02:45:28,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1452 transitions, 25572 flow, removed 1087 selfloop flow, removed 5 redundant places. [2023-08-24 02:45:28,552 INFO L231 Difference]: Finished difference. Result has 320 places, 1231 transitions, 22327 flow [2023-08-24 02:45:28,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=12603, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=22327, PETRI_PLACES=320, PETRI_TRANSITIONS=1231} [2023-08-24 02:45:28,554 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 289 predicate places. [2023-08-24 02:45:28,554 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1231 transitions, 22327 flow [2023-08-24 02:45:28,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.96875) internal successors, (3135), 32 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:45:28,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:45:28,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:45:28,563 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 02:45:28,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:28,760 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:45:28,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:45:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2114852935, now seen corresponding path program 7 times [2023-08-24 02:45:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:45:28,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875635459] [2023-08-24 02:45:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:45:28,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:45:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:45:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:45:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875635459] [2023-08-24 02:45:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875635459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:45:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340107783] [2023-08-24 02:45:29,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:45:29,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:45:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:45:29,791 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:45:29,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 02:45:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:45:30,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 02:45:30,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:45:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:45:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:45:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:45:30,047 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 02:45:30,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 02:45:30,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:45:30,239 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:45:30,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 02:45:30,303 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:45:30,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:45:30,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:45:30,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:45:30,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:45:30,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:45:30,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:45:30,834 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 02:45:30,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2023-08-24 02:45:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:45:30,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:45:47,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:47,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 94 [2023-08-24 02:45:47,942 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:47,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9306102 treesize of output 8912954 [2023-08-24 02:45:48,379 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:48,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8694 treesize of output 8238 [2023-08-24 02:45:48,493 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:48,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8182 treesize of output 7982 [2023-08-24 02:45:48,620 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:48,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 7926 treesize of output 6958 [2023-08-24 02:45:48,765 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:45:48,766 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6902 treesize of output 4910 [2023-08-24 02:51:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:51:31,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340107783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:51:31,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:51:31,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 38 [2023-08-24 02:51:31,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131637228] [2023-08-24 02:51:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:51:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 02:51:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:51:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 02:51:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1313, Unknown=47, NotChecked=0, Total=1560 [2023-08-24 02:51:31,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 365 [2023-08-24 02:51:31,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1231 transitions, 22327 flow. Second operand has 40 states, 40 states have (on average 84.775) internal successors, (3391), 40 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:51:31,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:51:31,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 365 [2023-08-24 02:51:31,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:51:35,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:42,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:44,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:46,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:48,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:50,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:51:53,456 INFO L124 PetriNetUnfolderBase]: 5997/8721 cut-off events. [2023-08-24 02:51:53,456 INFO L125 PetriNetUnfolderBase]: For 212214/212214 co-relation queries the response was YES. [2023-08-24 02:51:53,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86121 conditions, 8721 events. 5997/8721 cut-off events. For 212214/212214 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45709 event pairs, 531 based on Foata normal form. 2/8699 useless extension candidates. Maximal degree in co-relation 86011. Up to 6988 conditions per place. [2023-08-24 02:51:53,605 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 1060 selfloop transitions, 429 changer transitions 1/1490 dead transitions. [2023-08-24 02:51:53,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1490 transitions, 29286 flow [2023-08-24 02:51:53,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:51:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:51:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2632 transitions. [2023-08-24 02:51:53,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24865375531412376 [2023-08-24 02:51:53,608 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2632 transitions. [2023-08-24 02:51:53,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2632 transitions. [2023-08-24 02:51:53,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:51:53,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2632 transitions. [2023-08-24 02:51:53,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 90.75862068965517) internal successors, (2632), 29 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:51:53,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:51:53,615 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 365.0) internal successors, (10950), 30 states have internal predecessors, (10950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:51:53,616 INFO L175 Difference]: Start difference. First operand has 320 places, 1231 transitions, 22327 flow. Second operand 29 states and 2632 transitions. [2023-08-24 02:51:53,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1490 transitions, 29286 flow [2023-08-24 02:51:55,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1490 transitions, 27619 flow, removed 822 selfloop flow, removed 9 redundant places. [2023-08-24 02:51:55,404 INFO L231 Difference]: Finished difference. Result has 351 places, 1335 transitions, 24104 flow [2023-08-24 02:51:55,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=20720, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=841, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=24104, PETRI_PLACES=351, PETRI_TRANSITIONS=1335} [2023-08-24 02:51:55,405 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 320 predicate places. [2023-08-24 02:51:55,405 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1335 transitions, 24104 flow [2023-08-24 02:51:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 84.775) internal successors, (3391), 40 states have internal predecessors, (3391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:51:55,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:51:55,406 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:51:55,410 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 02:51:55,606 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,SelfDestructingSolverStorable31 [2023-08-24 02:51:55,606 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:51:55,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:51:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1299037899, now seen corresponding path program 8 times [2023-08-24 02:51:55,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:51:55,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723289331] [2023-08-24 02:51:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:51:55,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:51:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:51:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:51:56,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:51:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723289331] [2023-08-24 02:51:56,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723289331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:51:56,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887603661] [2023-08-24 02:51:56,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:51:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:51:56,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:51:56,685 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:51:56,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 02:51:56,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:51:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:51:56,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 02:51:56,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:51:57,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:51:57,463 INFO L322 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2023-08-24 02:51:57,463 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 55 [2023-08-24 02:51:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:51:57,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:51:58,353 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 02:51:58,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 327 [2023-08-24 02:52:05,131 INFO L322 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2023-08-24 02:52:05,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2023-08-24 02:52:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:52:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887603661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:52:05,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:52:05,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 35 [2023-08-24 02:52:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503926365] [2023-08-24 02:52:05,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:52:05,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 02:52:05,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:52:05,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 02:52:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 02:52:05,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 365 [2023-08-24 02:52:05,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1335 transitions, 24104 flow. Second operand has 37 states, 37 states have (on average 98.02702702702703) internal successors, (3627), 37 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:05,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:52:05,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 365 [2023-08-24 02:52:05,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:52:09,922 INFO L124 PetriNetUnfolderBase]: 6577/9571 cut-off events. [2023-08-24 02:52:09,922 INFO L125 PetriNetUnfolderBase]: For 251193/251193 co-relation queries the response was YES. [2023-08-24 02:52:10,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95678 conditions, 9571 events. 6577/9571 cut-off events. For 251193/251193 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 51170 event pairs, 598 based on Foata normal form. 1/9548 useless extension candidates. Maximal degree in co-relation 95555. Up to 7558 conditions per place. [2023-08-24 02:52:10,093 INFO L140 encePairwiseOnDemand]: 350/365 looper letters, 1074 selfloop transitions, 563 changer transitions 1/1638 dead transitions. [2023-08-24 02:52:10,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 1638 transitions, 32611 flow [2023-08-24 02:52:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:52:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:52:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2828 transitions. [2023-08-24 02:52:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.286960933536276 [2023-08-24 02:52:10,095 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2828 transitions. [2023-08-24 02:52:10,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2828 transitions. [2023-08-24 02:52:10,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:52:10,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2828 transitions. [2023-08-24 02:52:10,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 104.74074074074075) internal successors, (2828), 27 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:10,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:10,103 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 365.0) internal successors, (10220), 28 states have internal predecessors, (10220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:10,103 INFO L175 Difference]: Start difference. First operand has 351 places, 1335 transitions, 24104 flow. Second operand 27 states and 2828 transitions. [2023-08-24 02:52:10,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 1638 transitions, 32611 flow [2023-08-24 02:52:12,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1638 transitions, 31807 flow, removed 290 selfloop flow, removed 13 redundant places. [2023-08-24 02:52:12,921 INFO L231 Difference]: Finished difference. Result has 373 places, 1457 transitions, 27568 flow [2023-08-24 02:52:12,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=23300, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=27568, PETRI_PLACES=373, PETRI_TRANSITIONS=1457} [2023-08-24 02:52:12,922 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 342 predicate places. [2023-08-24 02:52:12,922 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 1457 transitions, 27568 flow [2023-08-24 02:52:12,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.02702702702703) internal successors, (3627), 37 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:12,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:52:12,923 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:52:12,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 02:52:13,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:52:13,127 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:52:13,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:52:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2085320665, now seen corresponding path program 9 times [2023-08-24 02:52:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:52:13,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591045130] [2023-08-24 02:52:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:52:13,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:52:13,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:52:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:52:14,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:52:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591045130] [2023-08-24 02:52:14,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591045130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:52:14,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612604000] [2023-08-24 02:52:14,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:52:14,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:52:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:52:14,517 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:52:14,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 02:52:14,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 02:52:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:52:14,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 02:52:14,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:52:15,474 INFO L322 Elim1Store]: treesize reduction 48, result has 54.3 percent of original size [2023-08-24 02:52:15,474 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 71 [2023-08-24 02:52:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:52:15,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:52:16,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:52:16,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 71 treesize of output 342 [2023-08-24 02:52:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:52:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612604000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:52:47,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:52:47,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 43 [2023-08-24 02:52:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040719355] [2023-08-24 02:52:47,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:52:47,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 02:52:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:52:47,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 02:52:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 02:52:47,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 365 [2023-08-24 02:52:47,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 1457 transitions, 27568 flow. Second operand has 45 states, 45 states have (on average 86.75555555555556) internal successors, (3904), 45 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:47,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:52:47,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 365 [2023-08-24 02:52:47,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:52:54,730 INFO L124 PetriNetUnfolderBase]: 7756/11330 cut-off events. [2023-08-24 02:52:54,731 INFO L125 PetriNetUnfolderBase]: For 323987/323987 co-relation queries the response was YES. [2023-08-24 02:52:55,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116412 conditions, 11330 events. 7756/11330 cut-off events. For 323987/323987 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 62609 event pairs, 659 based on Foata normal form. 3/11309 useless extension candidates. Maximal degree in co-relation 116279. Up to 8902 conditions per place. [2023-08-24 02:52:55,073 INFO L140 encePairwiseOnDemand]: 348/365 looper letters, 1285 selfloop transitions, 692 changer transitions 6/1983 dead transitions. [2023-08-24 02:52:55,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1983 transitions, 40593 flow [2023-08-24 02:52:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 02:52:55,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 02:52:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3722 transitions. [2023-08-24 02:52:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2549315068493151 [2023-08-24 02:52:55,077 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3722 transitions. [2023-08-24 02:52:55,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3722 transitions. [2023-08-24 02:52:55,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:52:55,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3722 transitions. [2023-08-24 02:52:55,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 93.05) internal successors, (3722), 40 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:55,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:55,088 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:55,088 INFO L175 Difference]: Start difference. First operand has 373 places, 1457 transitions, 27568 flow. Second operand 40 states and 3722 transitions. [2023-08-24 02:52:55,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1983 transitions, 40593 flow [2023-08-24 02:52:59,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1983 transitions, 39059 flow, removed 490 selfloop flow, removed 9 redundant places. [2023-08-24 02:52:59,036 INFO L231 Difference]: Finished difference. Result has 417 places, 1732 transitions, 34419 flow [2023-08-24 02:52:59,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=26283, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=34419, PETRI_PLACES=417, PETRI_TRANSITIONS=1732} [2023-08-24 02:52:59,038 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 386 predicate places. [2023-08-24 02:52:59,038 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1732 transitions, 34419 flow [2023-08-24 02:52:59,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 86.75555555555556) internal successors, (3904), 45 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:52:59,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:52:59,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:52:59,048 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 02:52:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:52:59,246 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:52:59,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:52:59,246 INFO L85 PathProgramCache]: Analyzing trace with hash -958003223, now seen corresponding path program 10 times [2023-08-24 02:52:59,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:52:59,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035489751] [2023-08-24 02:52:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:52:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:52:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:53:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:53:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:53:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035489751] [2023-08-24 02:53:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035489751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:53:00,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190246714] [2023-08-24 02:53:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:53:00,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:53:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:53:00,712 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:53:00,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 02:53:00,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:53:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:53:00,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 02:53:00,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:53:01,385 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:53:01,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:53:01,411 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 02:53:01,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 44 [2023-08-24 02:53:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:53:01,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:53:02,436 INFO L322 Elim1Store]: treesize reduction 16, result has 95.1 percent of original size [2023-08-24 02:53:02,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 327 [2023-08-24 02:53:12,986 INFO L322 Elim1Store]: treesize reduction 47, result has 35.6 percent of original size [2023-08-24 02:53:12,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 35 [2023-08-24 02:53:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:53:13,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190246714] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:53:13,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:53:13,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 11] total 37 [2023-08-24 02:53:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688522162] [2023-08-24 02:53:13,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:53:13,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 02:53:13,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:53:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 02:53:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 02:53:13,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 365 [2023-08-24 02:53:13,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1732 transitions, 34419 flow. Second operand has 39 states, 39 states have (on average 84.84615384615384) internal successors, (3309), 39 states have internal predecessors, (3309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:13,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:53:13,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 365 [2023-08-24 02:53:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:53:19,572 INFO L124 PetriNetUnfolderBase]: 7888/11523 cut-off events. [2023-08-24 02:53:19,572 INFO L125 PetriNetUnfolderBase]: For 336092/336092 co-relation queries the response was YES. [2023-08-24 02:53:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121591 conditions, 11523 events. 7888/11523 cut-off events. For 336092/336092 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 63808 event pairs, 593 based on Foata normal form. 1/11500 useless extension candidates. Maximal degree in co-relation 121443. Up to 8935 conditions per place. [2023-08-24 02:53:19,799 INFO L140 encePairwiseOnDemand]: 350/365 looper letters, 1116 selfloop transitions, 759 changer transitions 1/1876 dead transitions. [2023-08-24 02:53:19,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1876 transitions, 40443 flow [2023-08-24 02:53:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 02:53:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 02:53:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1984 transitions. [2023-08-24 02:53:19,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24707347447073474 [2023-08-24 02:53:19,801 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1984 transitions. [2023-08-24 02:53:19,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1984 transitions. [2023-08-24 02:53:19,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:53:19,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1984 transitions. [2023-08-24 02:53:19,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 90.18181818181819) internal successors, (1984), 22 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:19,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 365.0) internal successors, (8395), 23 states have internal predecessors, (8395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:19,870 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 365.0) internal successors, (8395), 23 states have internal predecessors, (8395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:19,870 INFO L175 Difference]: Start difference. First operand has 417 places, 1732 transitions, 34419 flow. Second operand 22 states and 1984 transitions. [2023-08-24 02:53:19,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1876 transitions, 40443 flow [2023-08-24 02:53:23,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1876 transitions, 39507 flow, removed 305 selfloop flow, removed 17 redundant places. [2023-08-24 02:53:23,683 INFO L231 Difference]: Finished difference. Result has 427 places, 1775 transitions, 36532 flow [2023-08-24 02:53:23,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=33485, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=36532, PETRI_PLACES=427, PETRI_TRANSITIONS=1775} [2023-08-24 02:53:23,684 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 396 predicate places. [2023-08-24 02:53:23,684 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1775 transitions, 36532 flow [2023-08-24 02:53:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 84.84615384615384) internal successors, (3309), 39 states have internal predecessors, (3309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:23,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:53:23,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:53:23,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 02:53:23,885 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,SelfDestructingSolverStorable34 [2023-08-24 02:53:23,886 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:53:23,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:53:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash 963725815, now seen corresponding path program 23 times [2023-08-24 02:53:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:53:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132959263] [2023-08-24 02:53:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:53:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:53:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:53:25,982 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 02:53:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:53:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132959263] [2023-08-24 02:53:25,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132959263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:53:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620197350] [2023-08-24 02:53:25,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:53:25,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:53:25,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:53:25,983 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:53:25,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 02:53:26,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:53:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:53:26,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 02:53:26,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:53:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:53:26,872 INFO L322 Elim1Store]: treesize reduction 72, result has 52.9 percent of original size [2023-08-24 02:53:26,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 59 treesize of output 95 [2023-08-24 02:53:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:53:27,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:53:27,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:53:27,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 338 [2023-08-24 02:53:33,413 INFO L322 Elim1Store]: treesize reduction 237, result has 27.1 percent of original size [2023-08-24 02:53:33,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 102 [2023-08-24 02:53:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:53:33,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620197350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:53:33,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:53:33,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 38 [2023-08-24 02:53:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846564771] [2023-08-24 02:53:33,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:53:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 02:53:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:53:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 02:53:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2023-08-24 02:53:33,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 365 [2023-08-24 02:53:33,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1775 transitions, 36532 flow. Second operand has 40 states, 40 states have (on average 84.025) internal successors, (3361), 40 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:33,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:53:33,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 365 [2023-08-24 02:53:33,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:53:43,390 INFO L124 PetriNetUnfolderBase]: 9400/13886 cut-off events. [2023-08-24 02:53:43,390 INFO L125 PetriNetUnfolderBase]: For 436448/436448 co-relation queries the response was YES. [2023-08-24 02:53:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149914 conditions, 13886 events. 9400/13886 cut-off events. For 436448/436448 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 81003 event pairs, 660 based on Foata normal form. 5/13867 useless extension candidates. Maximal degree in co-relation 149761. Up to 8400 conditions per place. [2023-08-24 02:53:43,873 INFO L140 encePairwiseOnDemand]: 347/365 looper letters, 1218 selfloop transitions, 1153 changer transitions 9/2380 dead transitions. [2023-08-24 02:53:43,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2380 transitions, 53062 flow [2023-08-24 02:53:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 02:53:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 02:53:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3604 transitions. [2023-08-24 02:53:43,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24684931506849314 [2023-08-24 02:53:43,884 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3604 transitions. [2023-08-24 02:53:43,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3604 transitions. [2023-08-24 02:53:43,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:53:43,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3604 transitions. [2023-08-24 02:53:43,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 90.1) internal successors, (3604), 40 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:43,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:43,892 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 365.0) internal successors, (14965), 41 states have internal predecessors, (14965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:43,892 INFO L175 Difference]: Start difference. First operand has 427 places, 1775 transitions, 36532 flow. Second operand 40 states and 3604 transitions. [2023-08-24 02:53:43,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2380 transitions, 53062 flow [2023-08-24 02:53:48,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2380 transitions, 52127 flow, removed 215 selfloop flow, removed 13 redundant places. [2023-08-24 02:53:48,818 INFO L231 Difference]: Finished difference. Result has 467 places, 2102 transitions, 47179 flow [2023-08-24 02:53:48,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=35753, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=862, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=47179, PETRI_PLACES=467, PETRI_TRANSITIONS=2102} [2023-08-24 02:53:48,820 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 436 predicate places. [2023-08-24 02:53:48,820 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 2102 transitions, 47179 flow [2023-08-24 02:53:48,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 84.025) internal successors, (3361), 40 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:53:48,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:53:48,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:53:48,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 02:53:49,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 02:53:49,023 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:53:49,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:53:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1118940277, now seen corresponding path program 11 times [2023-08-24 02:53:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:53:49,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732479992] [2023-08-24 02:53:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:53:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:53:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:53:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:53:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:53:50,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732479992] [2023-08-24 02:53:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732479992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:53:50,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833528797] [2023-08-24 02:53:50,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:53:50,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:53:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:53:50,457 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:53:50,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 02:53:50,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:53:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:53:50,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 106 conjunts are in the unsatisfiable core [2023-08-24 02:53:50,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:53:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:53:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:53:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:53:50,675 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 02:53:50,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 02:53:50,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 02:53:50,847 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:53:50,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 02:53:50,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:53:50,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:53:51,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:53:51,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:53:51,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:53:51,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:53:51,538 INFO L322 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2023-08-24 02:53:51,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 37 [2023-08-24 02:53:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:53:51,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:54:08,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:08,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 94 [2023-08-24 02:54:08,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:08,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 581622 treesize of output 557114 [2023-08-24 02:54:09,178 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:09,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8694 treesize of output 6702 [2023-08-24 02:54:09,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:09,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6646 treesize of output 6446 [2023-08-24 02:54:09,414 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:09,414 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 6390 treesize of output 5422 [2023-08-24 02:54:09,545 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:54:09,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 5366 treesize of output 4910 Received shutdown request... [2023-08-24 02:54:13,793 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:54:13,794 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:54:13,800 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 02:54:13,802 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 02:54:13,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 02:54:14,003 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,SelfDestructingSolverStorable36 [2023-08-24 02:54:14,003 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 64ms.. [2023-08-24 02:54:14,004 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 02:54:14,005 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 02:54:14,005 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 02:54:14,005 INFO L445 BasicCegarLoop]: Path program histogram: [23, 11, 1, 1, 1] [2023-08-24 02:54:14,007 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 02:54:14,007 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 02:54:14,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:54:14 BasicIcfg [2023-08-24 02:54:14,009 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 02:54:14,009 INFO L158 Benchmark]: Toolchain (without parser) took 790322.42ms. Allocated memory was 369.1MB in the beginning and 6.6GB in the end (delta: 6.2GB). Free memory was 343.8MB in the beginning and 4.7GB in the end (delta: -4.4GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-08-24 02:54:14,009 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 369.1MB. Free memory is still 345.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:54:14,009 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.97ms. Allocated memory is still 369.1MB. Free memory was 343.3MB in the beginning and 331.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 02:54:14,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.01ms. Allocated memory is still 369.1MB. Free memory was 331.6MB in the beginning and 328.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:54:14,010 INFO L158 Benchmark]: Boogie Preprocessor took 37.27ms. Allocated memory is still 369.1MB. Free memory was 328.9MB in the beginning and 326.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:54:14,010 INFO L158 Benchmark]: RCFGBuilder took 852.18ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 326.8MB in the beginning and 400.6MB in the end (delta: -73.8MB). Peak memory consumption was 50.6MB. Max. memory is 16.0GB. [2023-08-24 02:54:14,010 INFO L158 Benchmark]: TraceAbstraction took 789087.01ms. Allocated memory was 444.6MB in the beginning and 6.6GB in the end (delta: 6.2GB). Free memory was 399.6MB in the beginning and 4.7GB in the end (delta: -4.3GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. [2023-08-24 02:54:14,011 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 369.1MB. Free memory is still 345.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 287.97ms. Allocated memory is still 369.1MB. Free memory was 343.3MB in the beginning and 331.6MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 53.01ms. Allocated memory is still 369.1MB. Free memory was 331.6MB in the beginning and 328.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.27ms. Allocated memory is still 369.1MB. Free memory was 328.9MB in the beginning and 326.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 852.18ms. Allocated memory was 369.1MB in the beginning and 444.6MB in the end (delta: 75.5MB). Free memory was 326.8MB in the beginning and 400.6MB in the end (delta: -73.8MB). Peak memory consumption was 50.6MB. Max. memory is 16.0GB. * TraceAbstraction took 789087.01ms. Allocated memory was 444.6MB in the beginning and 6.6GB in the end (delta: 6.2GB). Free memory was 399.6MB in the beginning and 4.7GB in the end (delta: -4.3GB). Peak memory consumption was 3.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.5s, 166 PlacesBefore, 31 PlacesAfterwards, 172 TransitionsBefore, 26 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 7 FixpointIterations, 109 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 6 ConcurrentYvCompositions, 11 ChoiceCompositions, 180 TotalNumberOfCompositions, 1610 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1498, independent: 1480, independent conditional: 0, independent unconditional: 1480, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 802, independent: 794, independent conditional: 0, independent unconditional: 794, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1498, independent: 686, independent conditional: 0, independent unconditional: 686, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 802, unknown conditional: 0, unknown unconditional: 802] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 49, Positive conditional cache size: 0, Positive unconditional cache size: 49, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 64ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 64ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 64ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 64ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 203 locations, 4 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: 789.0s, OverallIterations: 37, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 141.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.6s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 5946 SdHoareTripleChecker+Valid, 35.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5946 mSDsluCounter, 2886 SdHoareTripleChecker+Invalid, 32.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1261 IncrementalHoareTripleChecker+Unchecked, 2653 mSDsCounter, 816 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35200 IncrementalHoareTripleChecker+Invalid, 37307 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 816 mSolverCounterUnsat, 233 mSDtfsCounter, 35200 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2650 GetRequests, 1220 SyntacticMatches, 85 SemanticMatches, 1345 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 17303 ImplicationChecksByTransitivity, 69.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47179occurred in iteration=36, InterpolantAutomatonStates: 794, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 601.9s InterpolantComputationTime, 1863 NumberOfCodeBlocks, 1863 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 2669 ConstructedInterpolants, 84 QuantifiedInterpolants, 42650 SizeOfPredicates, 575 NumberOfNonLiveVariables, 11050 ConjunctsInSsa, 1454 ConjunctsInUnsatCore, 104 InterpolantComputations, 3 PerfectInterpolantSequences, 332/742 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